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  • 1.
    Andgren, Karin
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Cederwall, Bo
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Bäck, Torbjörn
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Hadinia, Baharak
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Johnson, Arne
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Khaplanov, Anton
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Sandzelius, Mikael
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Wyss, Ramon
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    gamma-ray spectroscopy of At-1972008Inngår i: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 78, nr 4, s. 044328-1-044328-8Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Excited states of the extremely neutron-deficient nucleus At-197 have been studied in an in-beam experiment using the fusion-evaporation reaction Sn-118(Kr-82,p2n)At-197. gamma rays belonging to At-197 feeding the I-pi=(9/2(-)) ground state, as well as gamma rays feeding the 311-keV I-pi=(13/2(+)) isomer, decaying via the emission of gamma rays, and the 52-keV I-pi=(1/2(+)) alpha-decaying isomer have been identified using the recoil-alpha-decay tagging technique. Total Routhian surface calculations predict a near-spherical shape for the (9/2(-)) ground state and oblate shapes with beta(2) around -0.2 for the (1/2(+)) and the (13/2(+)) states. These predictions agree with our experimental findings.

  • 2. Axelsson, A
    et al.
    Nyberg, J
    Atac, A
    Bergstrom, M H
    Herskind, B
    de Angelis, G
    Back, T
    Bazzacco, D
    Bracco, A
    Camera, F
    Cederwall, B
    Fahlander, C
    Huijnen, J H
    Lunardi, S
    Million, B
    Napoli, D R
    Persson, J
    Piiparinen, M
    Alvarez, C R
    Sletten, G
    Varmette, P G
    Weiszflog, M
    Excited superdeformed band in Eu-1431999Inngår i: European Physical Journal A, ISSN 1434-6001, E-ISSN 1434-601X, Vol. 6, nr 2, s. 175-183Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A new superdeformed band has been discovered in a EUROBALL experiment and assigned to Eu-143. It has a maximum intensity of 35% of the Eu-143 yrast superdeformed band and the transition energies of the two bands are very similar. Based on comparison with cranked shell model calculations the new band is tentatively assigned the high-N intruder configuration pi 6(2)nu 7(0) and the parity and signature quantum numbers (pi, alpha) = (-1, +1/2). In addition to the already known high-energy transition at 3361 keV another discrete line at 2715 keV was found to be in coincidence with the yrast superdeformed band. However, it was not possible to connect the decay out of either of the superdeformed bands to, known normally deformed states.

  • 3. B Singh,
    et al.
    Bäck, Torbjörn
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Cederwall, Bo
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Zmeskal, J.
    et al.,
    Technical design report for the (P)over-barANDA Barrel DIRC detector2019Inngår i: JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS, nr 4Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The (P) over bar ANDA (anti-Proton ANnihiliation at DArmstadt) experiment will be one of the four flagship experiments at the new international accelerator complex FAIR (Facility for Antiproton and Ion Research) in Darmstadt, Germany. (P) over bar ANDA will address fundamental questions of hadron physics and quantum chromodynamics using high-intensity cooled antiproton beams with momenta between 1.5 and 15 GeV/c and a design luminosity of up to 2 x 10(32) cm(-2) S-1. Excellent particle identification (PID) is crucial to the success of the (P) over bar ANDA physics program. Hadronic PID in the barrel region of the target spectrometer will be performed by a fast and compact Cherenkov counter using the detection of internally reflected Cherenkov light (DIRC) technology. It is designed to cover the polar angle range from 22 degrees to 140 degrees and will provide at least 3 standard deviations (s.d.) pi/K separation up to 3.5 GeV/c, matching the expected upper limit of the final state kaon momentum distribution from simulation. This documents describes the technical design and the expected performance of the (P) over bar ANDA Barrel DIRC detector. The design is based on the successful BaBar DIRC with several key improvements. The performance and system cost were optimized in detailed detector simulations and validated with full system prototypes using particle beams at GSI and CERN. The final design meets or exceeds the PID goal of clean pi/K separation with at least 3 s.d. over the entire phase space of charged kaons in the Barrel DIRC.

  • 4.
    Barday, R.
    et al.
    Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany..
    Tashenov, Stanislav
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik. Stockholm Univ, Dept Atom Phys, SE-10691 Stockholm, Sweden.
    Bäck, Torbjörn
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Cederwall, Bo
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Eckardt, C.
    Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany..
    Enders, J.
    Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany..
    Goeoek, A.
    Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany..
    Khaplanov, Anton
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Poltoratska, Y.
    Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany..
    Schassburger, Kai-Uwe
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Surzhykov, A.
    Heidelberg Univ, Phys Inst Heidelberg, D-69120 Heidelberg, Germany..
    Wagner, M.
    Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany..
    ELECTRON BEAM POLARIMETRY AT LOW ENERGIES AND ITS APPLICATIONS2011Inngår i: POLARIZED SOURCES, TARGETS AND POLARIMETRY / [ed] Ciullo, G Contalbrigo, M Lenisa, P, WORLD SCIENTIFIC PUBL CO PTE LTD , 2011, s. 105-112Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Low energy (E-k similar to 100 keV) Mott scattering polarimetry is a widely established technique to measure the polarization of an electron beam. We analyze the feasibility of Mott scattering at energies up to 20 MeV. For further studies of the electron spin dynamics in the scattering process a correlation between the linear polarization of bremsstrahlung radiation and the electron beam polarization has been measured for the first time using a planar HPGe Compton polarimeter at the 100 keV source of polarized electrons at TU Darmstadt.

  • 5. Bark, R A
    et al.
    Tormanen, S
    Bäck, Torbjörn
    Cederwall, Bo
    Odegard, S W
    Cocks, J F C
    Helariutta, K
    Jones, P
    Julin, R
    Juutinen, S
    Kankaanpaa, H
    Kettunen, H
    Kuusiniemi, P
    Leino, M
    Muikku, M
    Rahkila, P
    Savelius, A
    Bandcrossings in Os-1711999Inngår i: Nuclear Physics A, ISSN 0375-9474, E-ISSN 1873-1554, Vol. 646, nr 4, s. 399-413Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The nucleus Os-171 has been populated using the reaction Sn-116(Ni-58,2pn). Four new bands are identified, and the previously known bands are extended in spin, to a maximum of 53/2 (h) over bar. One- and three-quasiparticle configurations are identified, and beta, gamma, and octupole configurations are assigned tentatively. The effects of a possible intruder configuration on the negative parity bands are tested using band-mixing calculations.

  • 6. Bark, R A
    et al.
    Tormanen, S
    Bäck, Torbjörn
    Cederwall, Bo
    Odegard, S W
    Cocks, J F C
    Helariutta, K
    Jones, P
    Julin, R
    Juutinen, S
    Kankaanpaa, H
    Kettunen, H
    Kuusiniemi, P
    Leino, M
    Muikku, M
    Rahkila, P
    Savelius, A
    Bergstrom, M
    Ingebretsen, F
    Maj, A
    Mattiuzzi, M
    Mueller, W
    Riedinger, L L
    Saitoh, T
    Tjom, P O
    Coexistence of triaxial and prolate shapes in Ir-1711999Inngår i: Nuclear Physics A, ISSN 0375-9474, E-ISSN 1873-1554, Vol. 657, nr 2, s. 113-133Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Excited states in Ir-171 have been observed for the first time. Gamma-rays were assigned to the nucleus by the recoil-decay tagging method, The ground-state band has a structure consistent with an h(11/2) proton coupled to a core of large triaxial deformation. At high spins, a bandcrossing occurs which is interpreted as a change in shape to a prolate deformation, Band-mixing calculations are performed for Ir171-175. These show that shape-coexistence between triaxial and prolate states in these nuclei follows the same systematics found in their Pt and Os neighbours. The systematics are also compared with deformations calculated for Ir171-179 using the code "Ultimate Cranker". Dipole bands were also observed, but tilted axis cranking calculations suggest that they are associated with a collective rotation.

  • 7.
    Barucca, G.
    et al.
    Univ Politecn Marche Ancona, Ancona, Italy..
    Davi, F.
    Univ Politecn Marche Ancona, Ancona, Italy..
    Lancioni, G.
    Univ Politecn Marche Ancona, Ancona, Italy..
    Mengucci, P.
    Univ Politecn Marche Ancona, Ancona, Italy..
    Montalto, L.
    Univ Politecn Marche Ancona, Ancona, Italy..
    Natali, P. P.
    Univ Politecn Marche Ancona, Ancona, Italy..
    Paone, N.
    Univ Politecn Marche Ancona, Ancona, Italy..
    Rinaldi, D.
    Univ Politecn Marche Ancona, Ancona, Italy..
    Scalise, L.
    Univ Politecn Marche Ancona, Ancona, Italy..
    Erni, W.
    Univ Basel, Basel, Switzerland..
    Krusche, B.
    Univ Basel, Basel, Switzerland..
    Steinacher, M.
    Univ Basel, Basel, Switzerland..
    Walford, N.
    Univ Basel, Basel, Switzerland..
    Cao, N.
    Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China..
    Liu, Z.
    Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China.;Johannes Gutenberg Univ Mainz, Inst Kernphys, Mainz, Germany..
    Liu, C.
    Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China..
    Liu, B.
    Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China..
    Shen, X.
    Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China..
    Sun, S.
    Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China..
    Tao, J.
    Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China..
    Zhao, G.
    Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China..
    Zhao, J.
    Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China..
    Albrecht, M.
    Ruhr Univ Bochum, Inst Expt Phys I, Bochum, Germany..
    Boekelmann, S.
    Ruhr Univ Bochum, Inst Expt Phys I, Bochum, Germany..
    Erlen, T.
    Ruhr Univ Bochum, Inst Expt Phys I, Bochum, Germany..
    Feldbauer, F.
    Ruhr Univ Bochum, Inst Expt Phys I, Bochum, Germany..
    Fink, M.
    Ruhr Univ Bochum, Inst Expt Phys I, Bochum, Germany..
    Frech, J.
    Ruhr Univ Bochum, Inst Expt Phys I, Bochum, Germany..
    Freudenreich, V.
    Ruhr Univ Bochum, Inst Expt Phys I, Bochum, Germany..
    Fritsch, M.
    Ruhr Univ Bochum, Inst Expt Phys I, Bochum, Germany..
    Hagdorn, R.
    Ruhr Univ Bochum, Inst Expt Phys I, Bochum, Germany..
    Heinsius, F. H.
    Ruhr Univ Bochum, Inst Expt Phys I, Bochum, Germany..
    Held, T.
    Ruhr Univ Bochum, Inst Expt Phys I, Bochum, Germany..
    Holtmann, T.
    Ruhr Univ Bochum, Inst Expt Phys I, Bochum, Germany..
    Keshk, I.
    Ruhr Univ Bochum, Inst Expt Phys I, Bochum, Germany..
    Koch, H.
    Ruhr Univ Bochum, Inst Expt Phys I, Bochum, Germany..
    Kopf, B.
    Ruhr Univ Bochum, Inst Expt Phys I, Bochum, Germany..
    Kuhlmann, M.
    Ruhr Univ Bochum, Inst Expt Phys I, Bochum, Germany..
    Kuemmel, M.
    Ruhr Univ Bochum, Inst Expt Phys I, Bochum, Germany..
    Kuessner, M.
    Ruhr Univ Bochum, Inst Expt Phys I, Bochum, Germany..
    Leiber, S.
    Ruhr Univ Bochum, Inst Expt Phys I, Bochum, Germany..
    Musiol, P.
    Ruhr Univ Bochum, Inst Expt Phys I, Bochum, Germany..
    Mustafa, A.
    Ruhr Univ Bochum, Inst Expt Phys I, Bochum, Germany..
    Pelizaeus, M.
    Ruhr Univ Bochum, Inst Expt Phys I, Bochum, Germany..
    Pitka, A.
    Ruhr Univ Bochum, Inst Expt Phys I, Bochum, Germany..
    Reher, J.
    Ruhr Univ Bochum, Inst Expt Phys I, Bochum, Germany..
    Reicherz, G.
    Ruhr Univ Bochum, Inst Expt Phys I, Bochum, Germany..
    Richter, M.
    Ruhr Univ Bochum, Inst Expt Phys I, Bochum, Germany..
    Schnier, C.
    Ruhr Univ Bochum, Inst Expt Phys I, Bochum, Germany..
    Sersin, S.
    Ruhr Univ Bochum, Inst Expt Phys I, Bochum, Germany..
    Sohl, L.
    Ruhr Univ Bochum, Inst Expt Phys I, Bochum, Germany..
    Sowa, C.
    Ruhr Univ Bochum, Inst Expt Phys I, Bochum, Germany..
    Steinke, M.
    Ruhr Univ Bochum, Inst Expt Phys I, Bochum, Germany..
    Triffterer, T.
    Ruhr Univ Bochum, Inst Expt Phys I, Bochum, Germany..
    Weber, T.
    Ruhr Univ Bochum, Inst Expt Phys I, Bochum, Germany..
    Wiedner, U.
    Ruhr Univ Bochum, Inst Expt Phys I, Bochum, Germany..
    Beck, R.
    Rhein Friedrich Wilhelms Univ Bonn, Bonn, Germany..
    Hammann, C.
    Rhein Friedrich Wilhelms Univ Bonn, Bonn, Germany..
    Hartmann, J.
    Rhein Friedrich Wilhelms Univ Bonn, Bonn, Germany..
    Ketzer, B.
    Rhein Friedrich Wilhelms Univ Bonn, Bonn, Germany..
    Muellers, J.
    Rhein Friedrich Wilhelms Univ Bonn, Bonn, Germany..
    Rossbach, M.
    Rhein Friedrich Wilhelms Univ Bonn, Bonn, Germany..
    Salisbury, B.
    Rhein Friedrich Wilhelms Univ Bonn, Bonn, Germany..
    Schmidt, C.
    Rhein Friedrich Wilhelms Univ Bonn, Bonn, Germany..
    Thoma, U.
    Rhein Friedrich Wilhelms Univ Bonn, Bonn, Germany..
    Urban, M.
    Rhein Friedrich Wilhelms Univ Bonn, Bonn, Germany..
    Bianconi, A.
    Univ Brescia, Brescia, Italy..
    Bragadireanu, M.
    Inst Natl C&D Pentru Fiz Inginerie Nucl Horia Hul, Bucharest, Romania..
    Pantea, D.
    Inst Natl C&D Pentru Fiz Inginerie Nucl Horia Hul, Bucharest, Romania..
    Czyzycki, W.
    Univ Technol Inst Appl Informat, Krakow, Poland..
    Domagala, M.
    Univ Technol Inst Appl Informat, Krakow, Poland..
    Filo, G.
    Univ Technol Inst Appl Informat, Krakow, Poland..
    Jaworowski, J.
    Univ Technol Inst Appl Informat, Krakow, Poland..
    Krawczyk, M.
    Univ Technol Inst Appl Informat, Krakow, Poland..
    Lisowski, E.
    Univ Technol Inst Appl Informat, Krakow, Poland..
    Lisowski, F.
    Univ Technol Inst Appl Informat, Krakow, Poland..
    Michalek, M.
    Univ Technol Inst Appl Informat, Krakow, Poland..
    Plazek, J.
    Univ Technol Inst Appl Informat, Krakow, Poland..
    Korcyl, K.
    Inst Nucl Phys PAN, IFJ, Krakow, Poland..
    Kozela, A.
    Inst Nucl Phys PAN, IFJ, Krakow, Poland..
    Kulessa, P.
    Inst Nucl Phys PAN, IFJ, Krakow, Poland..
    Lebiedowicz, P.
    Inst Nucl Phys PAN, IFJ, Krakow, Poland..
    Pysz, K.
    Inst Nucl Phys PAN, IFJ, Krakow, Poland..
    Schaefer, W.
    Inst Nucl Phys PAN, IFJ, Krakow, Poland..
    Szczurek, A.
    Inst Nucl Phys PAN, IFJ, Krakow, Poland..
    Fiutowski, T.
    Univ Sci & Technol, AGH, Krakow, Poland..
    Idzik, M.
    Univ Sci & Technol, AGH, Krakow, Poland..
    Swientek, K.
    Univ Sci & Technol, AGH, Krakow, Poland..
    Terlecki, P.
    Univ Sci & Technol, AGH, Krakow, Poland..
    Korcyl, G.
    Uniwersytet Jagiellonski, Ins Fiz, Krakow, Poland..
    Lalik, R.
    Uniwersytet Jagiellonski, Ins Fiz, Krakow, Poland..
    Malige, A.
    Uniwersytet Jagiellonski, Ins Fiz, Krakow, Poland..
    Moskal, P.
    Uniwersytet Jagiellonski, Ins Fiz, Krakow, Poland..
    Nowakowski, K.
    Uniwersytet Jagiellonski, Ins Fiz, Krakow, Poland..
    Przygoda, W.
    Uniwersytet Jagiellonski, Ins Fiz, Krakow, Poland..
    Rathod, N.
    Uniwersytet Jagiellonski, Ins Fiz, Krakow, Poland..
    Rudy, Z.
    Uniwersytet Jagiellonski, Ins Fiz, Krakow, Poland..
    Salabura, P.
    Uniwersytet Jagiellonski, Ins Fiz, Krakow, Poland..
    Smyrski, J.
    Uniwersytet Jagiellonski, Ins Fiz, Krakow, Poland..
    Augustin, I.
    Facil Antiproton & Ion Res Europe, FAIR, Darmstadt, Germany..
    Boehm, R.
    Facil Antiproton & Ion Res Europe, FAIR, Darmstadt, Germany..
    Lehmann, I.
    Facil Antiproton & Ion Res Europe, FAIR, Darmstadt, Germany..
    Nicmorus Marinescu, D.
    Facil Antiproton & Ion Res Europe, FAIR, Darmstadt, Germany..
    Schmitt, L.
    Facil Antiproton & Ion Res Europe, FAIR, Darmstadt, Germany..
    Varentsov, V.
    Facil Antiproton & Ion Res Europe, FAIR, Darmstadt, Germany..
    Al-Turany, M.
    GSI Helmholtzzentrum Schwerionenforschung GmbH, Darmstadt, Germany..
    Belias, A.
    GSI Helmholtzzentrum Schwerionenforschung GmbH, Darmstadt, Germany..
    Deppe, H.
    GSI Helmholtzzentrum Schwerionenforschung GmbH, Darmstadt, Germany..
    Dzhygadlo, R.
    GSI Helmholtzzentrum Schwerionenforschung GmbH, Darmstadt, Germany..
    Flemming, H.
    GSI Helmholtzzentrum Schwerionenforschung GmbH, Darmstadt, Germany..
    Gerhardt, A.
    GSI Helmholtzzentrum Schwerionenforschung GmbH, Darmstadt, Germany..
    Goetzen, K.
    GSI Helmholtzzentrum Schwerionenforschung GmbH, Darmstadt, Germany..
    Heinz, A.
    GSI Helmholtzzentrum Schwerionenforschung GmbH, Darmstadt, Germany..
    Karabowicz, R.
    GSI Helmholtzzentrum Schwerionenforschung GmbH, Darmstadt, Germany..
    Kurilla, U.
    GSI Helmholtzzentrum Schwerionenforschung GmbH, Darmstadt, Germany..
    Lehmann, D.
    GSI Helmholtzzentrum Schwerionenforschung GmbH, Darmstadt, Germany..
    Luehning, J.
    GSI Helmholtzzentrum Schwerionenforschung GmbH, Darmstadt, Germany..
    Lynen, U.
    GSI Helmholtzzentrum Schwerionenforschung GmbH, Darmstadt, Germany..
    Nakhoul, S.
    GSI Helmholtzzentrum Schwerionenforschung GmbH, Darmstadt, Germany..
    Orth, H.
    GSI Helmholtzzentrum Schwerionenforschung GmbH, Darmstadt, Germany..
    Peters, K.
    GSI Helmholtzzentrum Schwerionenforschung GmbH, Darmstadt, Germany.;Goethe Univ, Inst Kernphys, Frankfurt, Germany..
    Saito, T.
    GSI Helmholtzzentrum Schwerionenforschung GmbH, Darmstadt, Germany..
    Schepers, G.
    GSI Helmholtzzentrum Schwerionenforschung GmbH, Darmstadt, Germany..
    Schmidt, C. J.
    GSI Helmholtzzentrum Schwerionenforschung GmbH, Darmstadt, Germany..
    Schwarz, C.
    GSI Helmholtzzentrum Schwerionenforschung GmbH, Darmstadt, Germany..
    Schwiening, J.
    GSI Helmholtzzentrum Schwerionenforschung GmbH, Darmstadt, Germany..
    Taeschner, A.
    GSI Helmholtzzentrum Schwerionenforschung GmbH, Darmstadt, Germany..
    Traxler, M.
    GSI Helmholtzzentrum Schwerionenforschung GmbH, Darmstadt, Germany..
    Voss, B.
    GSI Helmholtzzentrum Schwerionenforschung GmbH, Darmstadt, Germany..
    Wieczorek, P.
    GSI Helmholtzzentrum Schwerionenforschung GmbH, Darmstadt, Germany..
    Abazov, V.
    Joint Inst Nucl Res, Dubna, Russia..
    Alexeev, G.
    Joint Inst Nucl Res, Dubna, Russia..
    Arefiev, V. A.
    Joint Inst Nucl Res, Dubna, Russia..
    Astakhov, V.
    Joint Inst Nucl Res, Dubna, Russia..
    Barabanov, M. Yu.
    Joint Inst Nucl Res, Dubna, Russia..
    Batyunya, B. V.
    Joint Inst Nucl Res, Dubna, Russia..
    Dodokhov, V. Kh.
    Joint Inst Nucl Res, Dubna, Russia..
    Fechtchenko, A.
    Joint Inst Nucl Res, Dubna, Russia..
    Galoyan, A.
    Joint Inst Nucl Res, Dubna, Russia..
    Golovanov, G.
    Joint Inst Nucl Res, Dubna, Russia..
    Koshurnikov, E. K.
    Joint Inst Nucl Res, Dubna, Russia..
    Lobanov, Y. Yu.
    Joint Inst Nucl Res, Dubna, Russia..
    Olshevskiy, A. G.
    Joint Inst Nucl Res, Dubna, Russia..
    Piskun, A. A.
    Joint Inst Nucl Res, Dubna, Russia..
    Samartsev, A.
    Joint Inst Nucl Res, Dubna, Russia..
    Shimanski, S.
    Joint Inst Nucl Res, Dubna, Russia..
    Skachkov, N. B.
    Joint Inst Nucl Res, Dubna, Russia..
    Skachkova, A. N.
    Joint Inst Nucl Res, Dubna, Russia..
    Strokovsky, E. A.
    Joint Inst Nucl Res, Dubna, Russia..
    Tokmenin, V.
    Joint Inst Nucl Res, Dubna, Russia..
    Uzhinsky, V.
    Joint Inst Nucl Res, Dubna, Russia..
    Verkheev, A.
    Joint Inst Nucl Res, Dubna, Russia..
    Vodopianov, A.
    Joint Inst Nucl Res, Dubna, Russia..
    Zhuravlev, N. I.
    Joint Inst Nucl Res, Dubna, Russia..
    Branford, D.
    Univ Edinburgh, Edinburgh, Midlothian, Scotland..
    Glazier, D.
    Univ Edinburgh, Edinburgh, Midlothian, Scotland..
    Watts, D.
    Univ Edinburgh, Edinburgh, Midlothian, Scotland..
    Boehm, M.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen, Germany..
    Eyrich, W.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen, Germany..
    Lehmann, A.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen, Germany..
    Miehling, D.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen, Germany..
    Pfaffinger, M.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen, Germany..
    Stelter, S.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen, Germany..
    Quin, N.
    Northwestern Univ, Evanston, IL USA..
    Robison, L.
    Northwestern Univ, Evanston, IL USA..
    Seth, K.
    Northwestern Univ, Evanston, IL USA..
    Xiao, T.
    Northwestern Univ, Evanston, IL USA..
    Bettoni, D.
    Univ Ferrara, Ferrara, Italy.;INFN, Sez Ferrara, Ferrara, Italy..
    Ali, A.
    Goethe Univ, Inst Kernphys, Frankfurt, Germany..
    Hamdi, A.
    Goethe Univ, Inst Kernphys, Frankfurt, Germany..
    Krebs, M.
    Goethe Univ, Inst Kernphys, Frankfurt, Germany..
    Nerling, F.
    GSI Helmholtzzentrum Schwerionenforschung GmbH, Darmstadt, Germany.;Goethe Univ, Inst Kernphys, Frankfurt, Germany..
    Belousov, A.
    Frankfurt Inst Adv Studies, Frankfurt, Germany..
    Kisel, I.
    Frankfurt Inst Adv Studies, Frankfurt, Germany..
    Kozlov, G.
    Frankfurt Inst Adv Studies, Frankfurt, Germany..
    Pugach, M.
    Frankfurt Inst Adv Studies, Frankfurt, Germany..
    Zyzak, M.
    Frankfurt Inst Adv Studies, Frankfurt, Germany..
    Bianchi, N.
    INFN, Lab Nazl Frascati, Frascati, Italy..
    Gianotti, P.
    INFN, Lab Nazl Frascati, Frascati, Italy..
    Lucherini, V.
    INFN, Lab Nazl Frascati, Frascati, Italy..
    Bracco, G.
    Univ Genoa, Dept Phys, Genoa, Italy.;INFN Genova, Genoa, Italy..
    Bodenschatz, S.
    INFN Genova, Genoa, Italy.;Justus Liebig Univ Giessen II, Phys Inst, Giessen, Germany..
    Brinkmann, K. T.
    INFN Genova, Genoa, Italy.;Justus Liebig Univ Giessen II, Phys Inst, Giessen, Germany..
    Diehl, S.
    INFN Genova, Genoa, Italy.;Justus Liebig Univ Giessen II, Phys Inst, Giessen, Germany..
    Dormenev, V.
    INFN Genova, Genoa, Italy.;Justus Liebig Univ Giessen II, Phys Inst, Giessen, Germany..
    Dueren, M.
    INFN Genova, Genoa, Italy.;Justus Liebig Univ Giessen II, Phys Inst, Giessen, Germany..
    Etzelmueller, E.
    INFN Genova, Genoa, Italy.;Justus Liebig Univ Giessen II, Phys Inst, Giessen, Germany..
    Foehl, K.
    INFN Genova, Genoa, Italy.;Justus Liebig Univ Giessen II, Phys Inst, Giessen, Germany..
    Galuska, M.
    INFN Genova, Genoa, Italy.;Justus Liebig Univ Giessen II, Phys Inst, Giessen, Germany..
    Gessler, T.
    INFN Genova, Genoa, Italy.;Justus Liebig Univ Giessen II, Phys Inst, Giessen, Germany..
    Gutz, E.
    INFN Genova, Genoa, Italy.;Justus Liebig Univ Giessen II, Phys Inst, Giessen, Germany..
    Hahn, C.
    INFN Genova, Genoa, Italy.;Justus Liebig Univ Giessen II, Phys Inst, Giessen, Germany..
    Hayrapetyan, A.
    INFN Genova, Genoa, Italy.;Justus Liebig Univ Giessen II, Phys Inst, Giessen, Germany..
    Kesselkaul, M.
    INFN Genova, Genoa, Italy.;Justus Liebig Univ Giessen II, Phys Inst, Giessen, Germany..
    Kuehn, W.
    INFN Genova, Genoa, Italy.;Justus Liebig Univ Giessen II, Phys Inst, Giessen, Germany..
    Lange, J. S.
    INFN Genova, Genoa, Italy.;Justus Liebig Univ Giessen II, Phys Inst, Giessen, Germany..
    Liang, Y.
    INFN Genova, Genoa, Italy.;Justus Liebig Univ Giessen II, Phys Inst, Giessen, Germany..
    Metag, V.
    INFN Genova, Genoa, Italy.;Justus Liebig Univ Giessen II, Phys Inst, Giessen, Germany..
    Moritz, M.
    INFN Genova, Genoa, Italy.;Justus Liebig Univ Giessen II, Phys Inst, Giessen, Germany..
    Nanova, M.
    INFN Genova, Genoa, Italy.;Justus Liebig Univ Giessen II, Phys Inst, Giessen, Germany..
    Novotny, R.
    INFN Genova, Genoa, Italy.;Justus Liebig Univ Giessen II, Phys Inst, Giessen, Germany..
    Schmidt, M.
    INFN Genova, Genoa, Italy.;Justus Liebig Univ Giessen II, Phys Inst, Giessen, Germany..
    Stenzel, H.
    INFN Genova, Genoa, Italy.;Justus Liebig Univ Giessen II, Phys Inst, Giessen, Germany..
    Strickert, M.
    INFN Genova, Genoa, Italy.;Justus Liebig Univ Giessen II, Phys Inst, Giessen, Germany..
    Thoering, U.
    INFN Genova, Genoa, Italy.;Justus Liebig Univ Giessen II, Phys Inst, Giessen, Germany..
    Wasem, T.
    INFN Genova, Genoa, Italy.;Justus Liebig Univ Giessen II, Phys Inst, Giessen, Germany..
    Wohlfahrt, B.
    INFN Genova, Genoa, Italy.;Justus Liebig Univ Giessen II, Phys Inst, Giessen, Germany..
    Zaunick, H. G.
    INFN Genova, Genoa, Italy.;Justus Liebig Univ Giessen II, Phys Inst, Giessen, Germany..
    Tomasi-Gustafsson, E.
    Univ Paris Saclay, IRFU, CEA, Gif Sur Yvette, France..
    Ireland, D.
    Univ Glasgow, Glasgow, Lanark, Scotland..
    Seitz, B.
    Univ Glasgow, Glasgow, Lanark, Scotland..
    Deepak, P. N.
    Birla Inst Technol & Sci, K K Birla Goa Campus, Pilani, Rajasthan, India..
    Kulkarni, A.
    Birla Inst Technol & Sci, K K Birla Goa Campus, Pilani, Rajasthan, India..
    Apostolou, A.
    Univ Groningen, KVI Ctr Adv Radiat Technol CART, Groningen, Netherlands..
    Kappert, R.
    Univ Groningen, KVI Ctr Adv Radiat Technol CART, Groningen, Netherlands..
    Kavatsyuk, M.
    Univ Groningen, KVI Ctr Adv Radiat Technol CART, Groningen, Netherlands..
    Loehner, H.
    Univ Groningen, KVI Ctr Adv Radiat Technol CART, Groningen, Netherlands..
    Messchendorp, J.
    Univ Groningen, KVI Ctr Adv Radiat Technol CART, Groningen, Netherlands..
    Rodin, V.
    Univ Groningen, KVI Ctr Adv Radiat Technol CART, Groningen, Netherlands..
    Schakel, P.
    Univ Groningen, KVI Ctr Adv Radiat Technol CART, Groningen, Netherlands..
    Vejdani, S.
    Univ Groningen, KVI Ctr Adv Radiat Technol CART, Groningen, Netherlands..
    Dutta, K.
    Gauhati Univ, Dept Phys, Gauhati, India..
    Kalita, K.
    Gauhati Univ, Dept Phys, Gauhati, India..
    Sohlbach, H.
    Fachhochschule Sudwestfalen, Iserlohn, Germany..
    Bianchi, L.
    Forschungszentrum Julich, Inst Kernphys, Julich, Germany..
    Deermann, D.
    Forschungszentrum Julich, Inst Kernphys, Julich, Germany..
    Derichs, A.
    Forschungszentrum Julich, Inst Kernphys, Julich, Germany..
    Dosdall, R.
    Forschungszentrum Julich, Inst Kernphys, Julich, Germany..
    Erven, A.
    Forschungszentrum Julich, Inst Kernphys, Julich, Germany..
    Gillitzer, A.
    Forschungszentrum Julich, Inst Kernphys, Julich, Germany..
    Goldenbaum, F.
    Forschungszentrum Julich, Inst Kernphys, Julich, Germany..
    Grunwald, D.
    Forschungszentrum Julich, Inst Kernphys, Julich, Germany..
    Jokhovets, L.
    Forschungszentrum Julich, Inst Kernphys, Julich, Germany..
    Lai, A.
    Forschungszentrum Julich, Inst Kernphys, Julich, Germany..
    Orfanitski, S.
    Forschungszentrum Julich, Inst Kernphys, Julich, Germany..
    Prasuhn, D.
    Forschungszentrum Julich, Inst Kernphys, Julich, Germany..
    Prencipe, E.
    Forschungszentrum Julich, Inst Kernphys, Julich, Germany..
    Puetz, J.
    Forschungszentrum Julich, Inst Kernphys, Julich, Germany..
    Ritman, J.
    Forschungszentrum Julich, Inst Kernphys, Julich, Germany..
    Rosenthal, E.
    Forschungszentrum Julich, Inst Kernphys, Julich, Germany..
    Schadmand, S.
    Forschungszentrum Julich, Inst Kernphys, Julich, Germany..
    Schmitz, R.
    Forschungszentrum Julich, Inst Kernphys, Julich, Germany..
    Sefzick, T.
    Forschungszentrum Julich, Inst Kernphys, Julich, Germany..
    Serdyuk, V.
    Forschungszentrum Julich, Inst Kernphys, Julich, Germany..
    Sterzenbach, G.
    Forschungszentrum Julich, Inst Kernphys, Julich, Germany..
    Stockmanns, T.
    Forschungszentrum Julich, Inst Kernphys, Julich, Germany..
    Wintz, P.
    Forschungszentrum Julich, Inst Kernphys, Julich, Germany..
    Wuestner, P.
    Forschungszentrum Julich, Inst Kernphys, Julich, Germany..
    Xu, H.
    Forschungszentrum Julich, Inst Kernphys, Julich, Germany..
    Zhou, Y.
    Forschungszentrum Julich, Inst Kernphys, Julich, Germany..
    Cao, X.
    Chinese Acad Sci, Inst Modern Phys, Lanzhou, Peoples R China..
    Hu, Q.
    Chinese Acad Sci, Inst Modern Phys, Lanzhou, Peoples R China..
    Li, H.
    Chinese Acad Sci, Inst Modern Phys, Lanzhou, Peoples R China..
    Li, Z.
    Chinese Acad Sci, Inst Modern Phys, Lanzhou, Peoples R China..
    Ma, X.
    Chinese Acad Sci, Inst Modern Phys, Lanzhou, Peoples R China..
    Rigato, V.
    INFN, Lab Nazl Legnaro, Legnaro, Italy..
    Isaksson, L.
    Lund Univ, Dept Phys, Lund, Sweden..
    Achenbach, P.
    Johannes Gutenberg Univ Mainz, Inst Kernphys, Mainz, Germany..
    Aycock, A.
    Johannes Gutenberg Univ Mainz, Inst Kernphys, Mainz, Germany..
    Corell, O.
    Johannes Gutenberg Univ Mainz, Inst Kernphys, Mainz, Germany..
    Denig, A.
    Johannes Gutenberg Univ Mainz, Inst Kernphys, Mainz, Germany..
    Distler, M.
    Johannes Gutenberg Univ Mainz, Inst Kernphys, Mainz, Germany..
    Hoek, M.
    Johannes Gutenberg Univ Mainz, Inst Kernphys, Mainz, Germany..
    Lauth, W.
    Johannes Gutenberg Univ Mainz, Inst Kernphys, Mainz, Germany..
    Merkel, H.
    Johannes Gutenberg Univ Mainz, Inst Kernphys, Mainz, Germany..
    Mueller, U.
    Johannes Gutenberg Univ Mainz, Inst Kernphys, Mainz, Germany..
    Pochodzalla, J.
    Johannes Gutenberg Univ Mainz, Inst Kernphys, Mainz, Germany..
    Schlimme, S.
    Johannes Gutenberg Univ Mainz, Inst Kernphys, Mainz, Germany..
    Sfienti, C.
    Johannes Gutenberg Univ Mainz, Inst Kernphys, Mainz, Germany..
    Thiel, M.
    Johannes Gutenberg Univ Mainz, Inst Kernphys, Mainz, Germany..
    Zambrana, M.
    Johannes Gutenberg Univ Mainz, Inst Kernphys, Mainz, Germany..
    Ahmadi, H.
    Helmholtz Inst Mainz, Mainz, Germany..
    Ahmed, S.
    Helmholtz Inst Mainz, Mainz, Germany..
    Bleser, S.
    Helmholtz Inst Mainz, Mainz, Germany..
    Boelting, M.
    Helmholtz Inst Mainz, Mainz, Germany..
    Capozza, L.
    Helmholtz Inst Mainz, Mainz, Germany..
    Dbeyssi, A.
    Helmholtz Inst Mainz, Mainz, Germany..
    Grasemann, P.
    Helmholtz Inst Mainz, Mainz, Germany..
    Klasen, R.
    Helmholtz Inst Mainz, Mainz, Germany..
    Kliemt, R.
    Helmholtz Inst Mainz, Mainz, Germany..
    Leithoff, H. H.
    Helmholtz Inst Mainz, Mainz, Germany..
    Maas, F.
    Helmholtz Inst Mainz, Mainz, Germany..
    Maldaner, S.
    Helmholtz Inst Mainz, Mainz, Germany..
    Michel, M.
    Helmholtz Inst Mainz, Mainz, Germany..
    Morales Morales, C.
    Helmholtz Inst Mainz, Mainz, Germany..
    Motzko, C.
    Helmholtz Inst Mainz, Mainz, Germany..
    Noll, O.
    Helmholtz Inst Mainz, Mainz, Germany..
    Pflueger, S.
    Helmholtz Inst Mainz, Mainz, Germany..
    Rodriguez Pineiro, D.
    Helmholtz Inst Mainz, Mainz, Germany..
    Steinen, M.
    Helmholtz Inst Mainz, Mainz, Germany..
    Wolff, S.
    Helmholtz Inst Mainz, Mainz, Germany..
    Zimmermann, I.
    Helmholtz Inst Mainz, Mainz, Germany..
    Fedorov, A.
    Belarusian State Univ, Res Inst Nucl Problems, Minsk, BELARUS..
    Korzhik, M.
    Belarusian State Univ, Res Inst Nucl Problems, Minsk, BELARUS..
    Missevitch, O.
    Belarusian State Univ, Res Inst Nucl Problems, Minsk, BELARUS..
    Balashoff, A.
    Moscow Power Engn Inst, Moscow, Russia..
    Boukharov, A.
    Moscow Power Engn Inst, Moscow, Russia..
    Malyshev, O.
    Moscow Power Engn Inst, Moscow, Russia..
    Balanutsa, P.
    Inst Theoret & Expt Phys, Moscow, Russia..
    Chernetsky, V.
    Inst Theoret & Expt Phys, Moscow, Russia..
    Demekhin, A.
    Inst Theoret & Expt Phys, Moscow, Russia..
    Dolgolenko, A.
    Inst Theoret & Expt Phys, Moscow, Russia..
    Fedorets, P.
    Inst Theoret & Expt Phys, Moscow, Russia..
    Gerasimov, A.
    Inst Theoret & Expt Phys, Moscow, Russia..
    Golubev, A.
    Inst Theoret & Expt Phys, Moscow, Russia..
    Goryachev, V.
    Inst Theoret & Expt Phys, Moscow, Russia..
    Kantsyrev, A.
    Inst Theoret & Expt Phys, Moscow, Russia..
    Kirin, D. Y.
    Inst Theoret & Expt Phys, Moscow, Russia..
    Kotov, A.
    Inst Theoret & Expt Phys, Moscow, Russia..
    Kristi, N.
    Inst Theoret & Expt Phys, Moscow, Russia..
    Ladygina, E.
    Inst Theoret & Expt Phys, Moscow, Russia..
    Luschevskaya, E.
    Inst Theoret & Expt Phys, Moscow, Russia..
    Matveev, V. A.
    Inst Theoret & Expt Phys, Moscow, Russia..
    Panjushkin, V.
    Inst Theoret & Expt Phys, Moscow, Russia..
    Stavinskiy, A. V.
    Inst Theoret & Expt Phys, Moscow, Russia..
    Basant, K. N.
    Bhabha Atom Res Ctr, Div Nucl Phys, Mumbai, Maharashtra, India..
    Jha, V.
    Bhabha Atom Res Ctr, Div Nucl Phys, Mumbai, Maharashtra, India..
    Kumawat, H.
    Bhabha Atom Res Ctr, Div Nucl Phys, Mumbai, Maharashtra, India..
    Mohanty, A. K.
    Bhabha Atom Res Ctr, Div Nucl Phys, Mumbai, Maharashtra, India..
    Roy, B.
    Bhabha Atom Res Ctr, Div Nucl Phys, Mumbai, Maharashtra, India..
    Saxena, A.
    Bhabha Atom Res Ctr, Div Nucl Phys, Mumbai, Maharashtra, India..
    Yogesh, S.
    Bhabha Atom Res Ctr, Div Nucl Phys, Mumbai, Maharashtra, India..
    Bonaventura, D.
    Westfal Wilhelms Univ Munster, Munster, Germany..
    Fritzsch, C.
    Westfal Wilhelms Univ Munster, Munster, Germany..
    Grieser, S.
    Westfal Wilhelms Univ Munster, Munster, Germany..
    Hargens, C.
    Westfal Wilhelms Univ Munster, Munster, Germany..
    Hergemoeller, A. K.
    Westfal Wilhelms Univ Munster, Munster, Germany..
    Hetz, B.
    Westfal Wilhelms Univ Munster, Munster, Germany..
    Huesken, N.
    Westfal Wilhelms Univ Munster, Munster, Germany..
    Khoukaz, A.
    Westfal Wilhelms Univ Munster, Munster, Germany..
    Wessels, J. P.
    Westfal Wilhelms Univ Munster, Munster, Germany..
    Herold, C.
    Suranaree Univ Technol, Nakhon Ratchasima, Thailand..
    Khosonthongkee, K.
    Suranaree Univ Technol, Nakhon Ratchasima, Thailand..
    Kobdaj, C.
    Suranaree Univ Technol, Nakhon Ratchasima, Thailand..
    Limphirat, A.
    Suranaree Univ Technol, Nakhon Ratchasima, Thailand..
    Nasawad, T.
    Suranaree Univ Technol, Nakhon Ratchasima, Thailand..
    Simantathammakul, T.
    Suranaree Univ Technol, Nakhon Ratchasima, Thailand..
    Srisawad, P.
    Suranaree Univ Technol, Nakhon Ratchasima, Thailand..
    Yan, Y.
    Suranaree Univ Technol, Nakhon Ratchasima, Thailand..
    Blinov, A. E.
    Novosibirsk State Univ, Novosibirsk, Russia..
    Kononov, S.
    Novosibirsk State Univ, Novosibirsk, Russia..
    Kravchenko, E. A.
    Novosibirsk State Univ, Novosibirsk, Russia..
    Antokhin, E.
    Budker Inst Nucl Phys, Novosibirsk, Russia..
    Barnyakov, M.
    Budker Inst Nucl Phys, Novosibirsk, Russia..
    Beloborodov, K.
    Budker Inst Nucl Phys, Novosibirsk, Russia..
    Blinov, V. E.
    Budker Inst Nucl Phys, Novosibirsk, Russia..
    Kuyanov, I. A.
    Budker Inst Nucl Phys, Novosibirsk, Russia..
    Pivovarov, S.
    Budker Inst Nucl Phys, Novosibirsk, Russia..
    Pyata, E.
    Budker Inst Nucl Phys, Novosibirsk, Russia..
    Tikhonov, Y.
    Budker Inst Nucl Phys, Novosibirsk, Russia..
    Kunne, R.
    Univ Paris Sud, Univ Paris Saclay, Inst Phys Nucl, CNRS IN2P3, F-91406 Orsay, France..
    Ramstein, B.
    Univ Paris Sud, Univ Paris Saclay, Inst Phys Nucl, CNRS IN2P3, F-91406 Orsay, France..
    Boca, G.
    Univ Pavia, INFN, Dipartimento Fis, Sez Pavia, Pavia, Italy..
    Duda, D.
    Univ Bohemia, Plzen, Czech Republic.;Charles Univ Prague, Fac Math & Phys, Prague, Czech Republic..
    Finger, M.
    Charles Univ Prague, Fac Math & Phys, Prague, Czech Republic.;Charles Univ Prague, Fac Math & Phys, Prague, Czech Republic..
    Kveton, A.
    Charles Univ Prague, Fac Math & Phys, Prague, Czech Republic..
    Pesek, M.
    Charles Univ Prague, Fac Math & Phys, Prague, Czech Republic..
    Peskova, M.
    Charles Univ Prague, Fac Math & Phys, Prague, Czech Republic..
    Prochazka, I.
    Charles Univ Prague, Fac Math & Phys, Prague, Czech Republic..
    Slunecka, M.
    Charles Univ Prague, Fac Math & Phys, Prague, Czech Republic..
    Gallus, P.
    Czech Tech Univ, Fac Nucl Sci & Phys Engn, Prague, Czech Republic..
    Jary, V.
    Czech Tech Univ, Fac Nucl Sci & Phys Engn, Prague, Czech Republic..
    Novy, J.
    Czech Tech Univ, Fac Nucl Sci & Phys Engn, Prague, Czech Republic..
    Tomasek, M.
    Czech Tech Univ, Fac Nucl Sci & Phys Engn, Prague, Czech Republic..
    Tomasek, L.
    Czech Tech Univ, Fac Nucl Sci & Phys Engn, Prague, Czech Republic..
    Virius, M.
    Czech Tech Univ, Fac Nucl Sci & Phys Engn, Prague, Czech Republic..
    Vrba, V.
    Czech Tech Univ, Fac Nucl Sci & Phys Engn, Prague, Czech Republic..
    Abramov, V.
    Inst High Energy Phys, Protvino, Russia..
    Bukreeva, S.
    Inst High Energy Phys, Protvino, Russia..
    Chernichenko, S.
    Inst High Energy Phys, Protvino, Russia..
    Derevschikov, A.
    Inst High Energy Phys, Protvino, Russia..
    Ferapontov, V.
    Inst High Energy Phys, Protvino, Russia..
    Goncharenko, Y.
    Inst High Energy Phys, Protvino, Russia..
    Levin, A.
    Inst High Energy Phys, Protvino, Russia..
    Maslova, E.
    Inst High Energy Phys, Protvino, Russia..
    Melnik, Y.
    Inst High Energy Phys, Protvino, Russia..
    Meschanin, A.
    Inst High Energy Phys, Protvino, Russia..
    Minaev, N.
    Inst High Energy Phys, Protvino, Russia..
    Mochalov, V.
    Inst High Energy Phys, Protvino, Russia..
    Moiseev, V.
    Inst High Energy Phys, Protvino, Russia..
    Morozov, D.
    Inst High Energy Phys, Protvino, Russia..
    Nogach, L.
    Inst High Energy Phys, Protvino, Russia..
    Poslavskiy, S.
    Inst High Energy Phys, Protvino, Russia..
    Ryazantsev, A.
    Inst High Energy Phys, Protvino, Russia..
    Ryzhikov, S.
    Inst High Energy Phys, Protvino, Russia..
    Semenov, P.
    Inst High Energy Phys, Protvino, Russia..
    Shein, I.
    Inst High Energy Phys, Protvino, Russia..
    Uzunian, A.
    Inst High Energy Phys, Protvino, Russia..
    Vasiliev, A.
    Inst High Energy Phys, Protvino, Russia..
    Yakutin, A.
    Inst High Energy Phys, Protvino, Russia..
    Roy, U.
    Visva Bharati, Sikaha Bhavana, Santini Ketan, W Bengal, India..
    Yabsley, B.
    Univ Sydney, Sch Phys, Sydney, NSW, Australia..
    Belostotski, S.
    B P Konstantinov Petersburg Nucl Phys Inst, Natl Res Ctr Kurchatov Inst, Gatchina, Russia..
    Gavrilov, G.
    B P Konstantinov Petersburg Nucl Phys Inst, Natl Res Ctr Kurchatov Inst, Gatchina, Russia..
    Izotov, A.
    B P Konstantinov Petersburg Nucl Phys Inst, Natl Res Ctr Kurchatov Inst, Gatchina, Russia..
    Manaenkov, S.
    B P Konstantinov Petersburg Nucl Phys Inst, Natl Res Ctr Kurchatov Inst, Gatchina, Russia..
    Miklukho, O.
    B P Konstantinov Petersburg Nucl Phys Inst, Natl Res Ctr Kurchatov Inst, Gatchina, Russia..
    Veretennikov, D.
    B P Konstantinov Petersburg Nucl Phys Inst, Natl Res Ctr Kurchatov Inst, Gatchina, Russia..
    Zhdanov, A.
    B P Konstantinov Petersburg Nucl Phys Inst, Natl Res Ctr Kurchatov Inst, Gatchina, Russia..
    Makonyi, K.
    Stockholms Univ, Stockholm, Sweden..
    Preston, M.
    Stockholms Univ, Stockholm, Sweden..
    Tegner, P. E.
    Stockholms Univ, Stockholm, Sweden..
    Woelbing, D.
    Stockholms Univ, Stockholm, Sweden..
    Atac, Ayse
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Bäck, Torbjörn
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Cederwall, Bo
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Gandhi, K.
    Sardar Vallabhbhai Natl Inst Technol, Dept Appl Phys, Surat, India..
    Rai, A. K.
    Sardar Vallabhbhai Natl Inst Technol, Dept Appl Phys, Surat, India..
    Godre, S.
    Veer Narmad South Gujarat Univ, Dept Phys, Surat, India..
    Calvo, D.
    INFN, Sez Torino, Turin, Italy..
    De Remigis, P.
    INFN, Sez Torino, Turin, Italy..
    Filippi, A.
    INFN, Sez Torino, Turin, Italy..
    Mazza, G.
    INFN, Sez Torino, Turin, Italy..
    Rivetti, A.
    INFN, Sez Torino, Turin, Italy..
    Wheadon, R.
    INFN, Sez Torino, Turin, Italy..
    Iazzi, F.
    Politecn Torino, Turin, Italy.;INFN, Sez Torino, Turin, Italy..
    Lavagno, A.
    Politecn Torino, Turin, Italy.;INFN, Sez Torino, Turin, Italy..
    Bussa, M. P.
    Univ Torino, Turin, Italy.;INFN, Sez Torino, Turin, Italy..
    Spataro, S.
    Univ Torino, Turin, Italy.;INFN, Sez Torino, Turin, Italy..
    Martin, A.
    Univ Trieste, Trieste, Italy.;INFN, Sez Trieste, Trieste, Italy.;Uppsala Univ, Inst Fysik astronomi, Uppsala, Sweden..
    Akram, A.
    Uppsala Univ, Inst Fysik astronomi, Uppsala, Sweden..
    Calen, H.
    Uppsala Univ, Inst Fysik astronomi, Uppsala, Sweden..
    Ikegami Andersson, W.
    Uppsala Univ, Inst Fysik astronomi, Uppsala, Sweden..
    Johansson, T.
    Uppsala Univ, Inst Fysik astronomi, Uppsala, Sweden..
    Kupsc, A.
    Uppsala Univ, Inst Fysik astronomi, Uppsala, Sweden..
    Marciniewski, P.
    Uppsala Univ, Inst Fysik astronomi, Uppsala, Sweden..
    Papenbrock, M.
    Uppsala Univ, Inst Fysik astronomi, Uppsala, Sweden..
    Regina, J.
    Uppsala Univ, Inst Fysik astronomi, Uppsala, Sweden..
    Schoenning, K.
    Uppsala Univ, Inst Fysik astronomi, Uppsala, Sweden..
    Wolke, M.
    Uppsala Univ, Inst Fysik astronomi, Uppsala, Sweden..
    Diaz, J.
    Univ Valencia, Inst Fis Corpuscular, CSIC, Valencia, Spain..
    Pothodi Chackara, V.
    Sardar Patel Univ, Dept Phys, Vallabh Vidynagar, India..
    Chlopik, A.
    Natl Ctr Nucl Res, Warsaw, Poland..
    Kesik, G.
    Natl Ctr Nucl Res, Warsaw, Poland..
    Melnychuk, D.
    Natl Ctr Nucl Res, Warsaw, Poland..
    Trzcinski, A.
    Natl Ctr Nucl Res, Warsaw, Poland..
    Wojciechowski, M.
    Natl Ctr Nucl Res, Warsaw, Poland..
    Wronka, S.
    Natl Ctr Nucl Res, Warsaw, Poland..
    Zwieglinski, B.
    Natl Ctr Nucl Res, Warsaw, Poland..
    Amsler, C.
    Stefan Meyer Inst Subatomare Phys, Osterreich Akad Wissensch, Vienna, Austria..
    Buehler, P.
    Stefan Meyer Inst Subatomare Phys, Osterreich Akad Wissensch, Vienna, Austria..
    Kratochwil, N.
    Stefan Meyer Inst Subatomare Phys, Osterreich Akad Wissensch, Vienna, Austria..
    Marton, J.
    Stefan Meyer Inst Subatomare Phys, Osterreich Akad Wissensch, Vienna, Austria..
    Nalti, W.
    Stefan Meyer Inst Subatomare Phys, Osterreich Akad Wissensch, Vienna, Austria..
    Steinschaden, D.
    Stefan Meyer Inst Subatomare Phys, Osterreich Akad Wissensch, Vienna, Austria..
    Suzuki, K.
    Stefan Meyer Inst Subatomare Phys, Osterreich Akad Wissensch, Vienna, Austria..
    Widmann, E.
    Stefan Meyer Inst Subatomare Phys, Osterreich Akad Wissensch, Vienna, Austria..
    Zimmermann, S.
    Stefan Meyer Inst Subatomare Phys, Osterreich Akad Wissensch, Vienna, Austria..
    Zmeskal, J.
    Stefan Meyer Inst Subatomare Phys, Osterreich Akad Wissensch, Vienna, Austria..
    Precision resonance energy scans with the PANDA experiment at FAIR: Sensitivity study for width and line shape measurements of the X(3872)2019Inngår i: European Physical Journal A, ISSN 1434-6001, E-ISSN 1434-601X, Vol. 55, nr 3, artikkel-id 42Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    .This paper summarises a comprehensive Monte Carlo simulation study for precision resonance energy scan measurements. Apart from the proof of principle for natural width and line shape measurements of very narrow resonances with PANDA, the achievable sensitivities are quantified for the concrete example of the charmonium-like X(3872) state discussed to be exotic, and for a larger parameter space of various assumed signal cross-sections, input widths and luminosity combinations. PANDA is the only experiment that will be able to perform precision resonance energy scans of such narrow states with quantum numbers of spin and parities that differ from JPC=1--.

  • 8.
    Bäck, Torbjörn
    KTH, Tidigare Institutioner                               , Fysik.
    Spectroscopy of neutron deficient nuclei in the A=90 and A=170 mass regions2002Doktoravhandling, med artikler (Annet vitenskapelig)
  • 9.
    Bäck, Torbjörn
    KTH, Tidigare Institutioner                               , Fysik.
    Superdeformed states in A90 nuclei1999Licentiatavhandling, med artikler (Annet vitenskapelig)
  • 10.
    Bäck, Torbjörn
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Cederkall, J.
    Cederwall, Bo
    KTH, Tidigare Institutioner, Fysik.
    Johnson, Arne
    KTH, Tidigare Institutioner, Fysik.
    Kerek, Andras
    KTH, Tidigare Institutioner, Fysik.
    Klamra, Wlodzimierz
    KTH, Tidigare Institutioner, Fysik.
    van der Marel, J.
    Molnar, J.
    Novak, D.
    Sohler, D.
    Steen, M.
    Uhlen, P.
    A TOF-PET system for educational purposes2002Inngår i: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 477, nr 03-jan, s. 82-87Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A TOF-PET system has been designed and constructed for educational purposes. The aim of this system is to demonstrate the possibilities of positron emission tomography in general and the time-of-flight method in particular to the students of various courses at the Royal Institute of Technology, Stockholm, Sweden. The set-up consists of 48 small BaF2 crystals coupled to fast photomultipliers placed in a ring geometry. The signals of the photomultipliers are fed into fast constant fraction discriminators (CFD). The outputs of these are directed to a specially designed logic VME unit. which combines the CFD signals of 6 neighbouring channels to one signal by adding a different delay to each channel. The logic circuitry produces a prompt pulse for each event that serves as the start pulse for the 8-channel fast TDC. The delayed pulses act as the stop pulses for the TDC. In a computer. the measured times are converted into information about which the photomultipliers fired with the difference in the time of flight. The set-up is described and the results are presented.

  • 11.
    Bäck, Torbjörn
    et al.
    KTH, Tidigare Institutioner                               , Fysik.
    Cederkäll, Joakim
    KTH, Tidigare Institutioner                               , Fysik.
    Cederwall, Bo
    KTH, Tidigare Institutioner                               , Fysik.
    Johnson, Arne
    KTH, Tidigare Institutioner                               , Fysik.
    Kerek, Andras
    KTH, Tidigare Institutioner                               , Fysik.
    Klamra, Wlodzimierz
    van der Marel, J
    Molnar, J
    Novak, D
    Sohler, D
    Steen, M
    Uhlen, P
    An educational tool for demonstrating the TOF-PET technique2001Inngår i: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 471, nr 1-2, s. 200-204Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A detector system for positron emission tomography with time-of-flight capability has been built to serve as an educational tool for undergraduate students. The set-up consists of 48 BaF2 scintillator crystals, each coupled to a fast photo-multiplier tube, mounted in a circular geometry. The analogue detector pulses are handled by fast constant fraction discriminators. A dedicated unit reduces the 48 channels to eight channels via delay-fine encoding, and the signals are then fed to an eight channel fast time-to-digital converter. A VME processor sorts the events and sends them to a workstation where the coincident events are extracted. The time resolution of the detectors together with fast VME based electronics allows for time-of-flight measurements to improve on the signal-to-noise ratio in the, reconstructed images. The system can be used for different types of exercises for the students, varying from the fundamentals of scintillator detectors to advanced image reconstruction. The set-up is described and some results are presented. (C) 2001 Elsevier Science B.V. All rights reserved.

  • 12.
    Bäck, Torbjörn
    et al.
    KTH, Tidigare Institutioner                               , Fysik.
    Cederwall, Bo
    KTH, Tidigare Institutioner                               , Fysik.
    Lagergren, Karin
    KTH, Tidigare Institutioner                               , Fysik.
    Wyss, Ramon
    KTH, Tidigare Institutioner                               , Fysik.
    Johnson, Arne
    KTH, Tidigare Institutioner                               , Fysik.
    Greenlees, P
    Jenkins, D
    Jones, P
    Joss, T
    Julin, R
    Juutinen, S
    Keenan, A
    Kettunen, H
    Kuusiniemi, P
    Leino, M
    Leppanen, P
    Muikku, M
    Nieminen, P
    Pakarinen, J
    Rahkila, P
    Uusitalo, J
    Spectroscopy of the neutron-deficient nuclide Pt-1712003Inngår i: European Physical Journal A, ISSN 1434-6001, E-ISSN 1434-601X, Vol. 17, nr 1, s. 1-5Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A number of previously unobserved gamma-rays emitted from the neutron-deficient nuclide Pt-171 have been identified using the recoil decay tagging technique. The level scheme has been updated using information from gamma-gamma coincidences and angular distribution measurements. To further confirm the assignments of the gamma-rays to Pt-171, the events were correlated with the alpha-decay of the daughter nucleus Os-167.

  • 13.
    Bäck, Torbjörn
    et al.
    KTH, Tidigare Institutioner                               , Fysik.
    Cederwall, Bo
    KTH, Tidigare Institutioner                               , Fysik.
    Lagergren, Karin
    KTH, Tidigare Institutioner                               , Fysik.
    Wyss, Ramon
    KTH, Tidigare Institutioner                               , Fysik.
    Johnson, Arne
    KTH, Tidigare Institutioner                               , Fysik.
    Karlgren, Daniel
    KTH, Tidigare Institutioner                               , Fysik.
    Greenlees, P
    Jenkins, D
    Jones, P
    Joss, T
    Julin, R
    Juutinen, S
    Keenan, A
    Kettunen, H
    Kuusiniemi, P
    Leino, M
    Leppanen, P
    Muikku, M
    Nieminen, P
    Pakarinen, J
    Rahkila, P
    Uusitalo, J
    First observation of gamma-rays from the proton emitter Au-1712003Inngår i: European Physical Journal A, ISSN 1434-6001, E-ISSN 1434-601X, Vol. 16, nr 4, s. 489-494Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Gamma-rays from the alpha- and proton-unstable nuclide Au-171 have been observed for the first time. The gamma-rays were correlated with both a proton- and an alpha-particle decay branch, confirming that the nucleus decays by alpha and proton emission from a single (11/2(-)) state. The measurement confirms the previously determined half-lives for these particle decays but the present values are of higher precision. In addition, a longer half-life than determined in previous work was measured for the proton-unstable tentative ground state. The results are discussed in relation to structures in neighbouring nuclei and compared with a Strutinsky-type TRS calculation.

  • 14.
    Bäck, Torbjörn
    et al.
    KTH, Tidigare Institutioner, Fysik.
    Cederwall, Bo
    KTH, Tidigare Institutioner, Fysik.
    Wyss, Ramon
    KTH, Tidigare Institutioner, Fysik.
    Johnson, Arne
    KTH, Tidigare Institutioner, Fysik.
    Cederkäll, Joakim
    KTH, Tidigare Institutioner, Fysik.
    Devlin, M
    Elson, J
    LaFosse, R
    Lerma, F
    Sarantites, G
    Clark, M
    Fallon, P
    Lee, Y
    Macchiavelli, O
    Macleod, W
    Observation of superdeformed states in Mo-881999Inngår i: European Physical Journal A, ISSN 1434-6001, E-ISSN 1434-601X, Vol. 6, nr 4, s. 391-397Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    High-spin states in Mo-88 were studied using the GAMMASPHERE germanium detector array in conjunction with the MICROBALL CsI(TI) charged-particle detector system. Three gamma-ray cascades with dynamic moments of inertia showing similar characteristics to superdeformed rotational bands observed in the neighbouring A = 80 region have been identified and assigned to the nucleus Mo-88. The quadrupole moment of the strongest band, deduced by the Residual Doppler Shift Method, corresponds to a quadrupole deformation of beta(2) approximate to 0.6. This confirms the superdeformed nature of this band. The experimental data are interpreted in the framework of total routhian surface calculations. All three hands are assigned to two-quasi-particle proton configurations at superdeformed shape.

  • 15.
    Bäck, Torbjörn
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Qi, Chong
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Cederwall, Bo
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Liotta, Roberto
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Ghazi Moradi, Farnaz
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Johnson, Arne
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Wyss, Ramon
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Wadsworth, R.
    Transition probabilities near Sn-100 and the stability of the N, Z=50 shell closure2013Inngår i: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 87, nr 3, s. 031306-Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Recent B(E2; 0(g.s.)(+) -> 2(1)(+)) measurements in light tin isotopes have revealed surprisingly large values relative to standard shell model predictions, generating an unexpected asymmetry in the B(E2) values with respect to the neutron midshell. This effect has triggered various speculations as to its origin, such as a possible weakening of the N, Z = 50 shell closure. Here we present new shell model calculations to investigate the origin of the observed asymmetric character of the B(E2) values in the tin isotopes. By including the effects of the neutron g(9/2) orbital below the N = 50 shell gap it is shown that Pauli blocking effects may play an important role near the N = 50 shell closure. A new set of single-particle energies and monopole interactions, fitted to the experimental data in the region, together with the isospin-dependent effective charge suggested by Bohr and Mottelson is shown to reproduce the experimental transition rate values in the Sn isotopic chain.

  • 16.
    Bäck, Torbjörn
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Qi, Chong
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Cederwall, Bo
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Liotta, Roberto
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Partikel- och astropartikelfysik.
    Moradi, Farnaz Ghazi
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Johnson, Arne
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Wyss, Ramon
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Wadsworth, R.
    The B(E2;0(gs)(+) -> 2(+)) systematics of Sn and Te isotopes in light of data in the light Sn region including a recent measurement in Te-108 using the combined recoil-decay-tagging-recoil-distance Doppler technique2012Inngår i: Physica Scripta, ISSN 0031-8949, E-ISSN 1402-4896, Vol. T150, s. 014003-Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    An experimental technique combining the well-established alpha/p-decay-recoil-tagging method with a differential plunger has recently been successful in producing results in the neutron-deficient region near Sn-100. This experimental technique is briefly presented here and the result of a recent measurement for Te-108 is put in the context of the systematics of B(E-2) values for the Te and Sn isotopic chains. New state-of-the-art shell-model calculations are presented for the Sn data, and possible explanations for the unusually large B(E-2) values for the Sn isotopes near the N = 50 shell closure are given.

  • 17.
    Bäck, Torbjörn
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Qi, Chong
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Ghazi Moradi, Farnaz
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Cederwall, Bo
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Johnson, Arne
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Liotta, Roberto
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Wyss, Ramon
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Al-Azri, H.
    Bloor, D.
    Brock, T.
    Wadsworth, R.
    Grahn, T.
    Greenlees, P. T.
    Hauschild, K.
    Herzan, A.
    Jacobsson, U.
    Jones, P. M.
    Julin, R.
    Juutinen, S.
    Ketelhut, S.
    Leino, M.
    Lopez-Martens, A.
    Nieminen, P.
    Peura, P.
    Rahkila, P.
    Rinta-Antila, S.
    Ruotsalainen, P.
    Sandzelius, M.
    Saren, J.
    Scholey, C.
    Sorri, J.
    Uusitalo, J.
    Go, S.
    Ideguchi, E.
    Cullen, D. M.
    Procter, M. G.
    Braunroth, T.
    Dewald, A.
    Fransen, C.
    Hackstein, M.
    Litzinger, J.
    Rother, W.
    Lifetime measurement of the first excited 2(+) state in (108)Te2011Inngår i: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 84, nr 4, s. 041306-Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The lifetime of the first excited 2(+) state in the neutron deficient nuclide (108)Te has been measured for the first time, using a combined recoil decay tagging and recoil distance Doppler shift technique. The deduced reduced transition probability is B(E2;0(g.s.)(+) -> 2(+)) = 0.39(-0.04)(+0.05)e(2)b(2). Compared to previous experimental data on neutron deficient tellurium isotopes, the new data point constitutes a large step (six neutrons) toward the N = 50 shell closure. In contrast to what has earlier been reported for the light tin isotopes, our result for tellurium does not show any enhanced transition probability with respect to the theoretical predictions and the tellurium systematics including the new data is successfully reproduced by state-of-the-art shell model calculations.

  • 18.
    Cederwall, Bo
    et al.
    KTH, Tidigare Institutioner                               , Fysik.
    Bäck, Torbjörn
    KTH, Tidigare Institutioner                               , Fysik.
    Bark, R
    Tormanen, S
    Odegard, S
    King, L
    Simpson, J
    Page, D
    Amzal, N
    Cullen, M
    Greenlees, T
    Keenan, A
    Lemmon, R
    Cocks, C
    Helariutta, K
    Jones, M
    Julin, R
    Juutinen, S
    Kettunen, H
    Kankaanpaa, H
    Kuusiniemi, P
    Leino, M
    Muikku, M
    Rahkila, P
    Savelius, A
    Uusitalo, J
    Magierski, P
    Wyss, Ramon
    KTH, Tidigare Institutioner                               , Fysik.
    Collective rotational-vibrational transition in the very neutron-deficient nuclei (171,172)-Pt1998Inngår i: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 443, nr 1-4, s. 69-76Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Excited states have been identified for the first time in very neutron deficient Pt-171.172 nuclei using the recoil-or-decay tagging technique. The ground-state band in Pt-172 has been established up to I-pi = 8+. A similar level sequence, presumably built on the I-pi = 13/2(+) state, is observed for Pt-171. The data are compared with theoretical calculations based on the mean field approach and the random phase approximation and are put into the context of the systematics of platinum isotopes. (C) 1998 Elsevier Science B.V. All rights reserved.

  • 19. Cederwall, Bo
    et al.
    Bäck, Torbjörn
    Cederkall, J
    Johnson, A
    LaFosse, D R
    Devlin, M
    Elson, J
    Lerma, F
    Sarantites, D G
    Clark, R M
    Lee, I Y
    Macchiavelli, A O
    Macleod, R W
    Bark, R
    Tormanen, S
    Odegard, S
    King, S L
    Simpson, J
    Page, R D
    Amzal, N
    Cullen, D M
    Greenlees, P T
    Keenan, A
    Lemmon, R
    Cocks, J F C
    Helariutta, K
    Jones, P M
    Julin, R
    Juutinen, S
    Hettunen, H
    Kankaanp, H
    Kuusiniemi, P
    Leino, M
    Muikko, M
    Savelius, A
    Uusitalo, J
    Coexistence in proton rich A-90 and A-170 nuclei.1998Inngår i: Abstract of Papers of the American Chemical Society, ISSN 0065-7727, Vol. 215, s. U955-U955Artikkel i tidsskrift (Fagfellevurdert)
  • 20.
    Cederwall, Bo
    et al.
    KTH, Tidigare Institutioner, Fysik.
    Bäck, Torbjörn
    KTH, Tidigare Institutioner, Fysik.
    Wyss, Ramon
    KTH, Tidigare Institutioner, Fysik.
    Johnson, Arne
    KTH, Tidigare Institutioner, Fysik.
    Cederkäll, Joakim
    KTH, Tidigare Institutioner, Fysik.
    Devlin, M
    Elson, J
    LaFosse, R
    Lerma, F
    Sarantites, G
    Clark, M
    Fallon, P
    Lee, Y
    Macchiavelli, O
    Macleod, W
    Favoured superdeformed states in 89TC1999Inngår i: European Physical Journal A, ISSN 1434-6001, E-ISSN 1434-601X, Vol. 6, nr 3, s. 251-255Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A superdeformed band consisting of a cascade of ten gamma-ray transitions has been identified and assigned to the nucleus Tc-89, close to the proton dripline. The quadrupole moment of the band (Q(t) = 6.7(-2.3)(+3.0) eb, as measured by the Residual Doppler Shift Method) as well as a large dynamic moment of inertia point to a highly elongated shape. With a relative population of approximately 15% of the gamma-ray flux in the Tc-89 exit channel, thp band is among the most intense superdeformed bands observed to date.

  • 21.
    Cederwall, Bo
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Ghazi Moradi, Farnaz
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Bäck, Torbjörn
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Johnson, Arne
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Blomqvist, Jan-Erik
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Clément, E.
    Grand Accélérateur National d´lons Lourds, Cean Cedex, France.
    de France, G.
    Grand Accélérateur National d´lons Lourds, Cean Cedex, France.
    Wadsworth, R.
    Department of Physics, University of York, UK.
    Andgren, Karin
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Lagergren, Karin
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Dijon, A.
    Grand Accélérateur National d´lons Lourds, Cean Cedex, France.
    Jaworski, G.
    Heavy Ion Laboratory, Univeristy of Warsaw, Warsaw, Poland.
    Liotta, Roberto
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Partikel- och astropartikelfysik.
    Qi, Chong
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Nyakó, B. M.
    Institute of Nuclear Research of the Hungarian Academy of Sciences, Debrecen, Hungary.
    Nyberg, J.
    Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden.
    Palacz, M.
    Heavy Ion Laboratory, Univeristy of Warsaw, Warsaw, Poland.
    Al-Azri, H.
    Department of Physics, University of York, UK.
    Algora, A.
    IFIC, CSIC University of Valencia, Valencia, Spain.
    de Angelis, G.
    Instituto Nazionael di Fisica Nucleare, Laboratori Nazionali di Legnaro, Legnaro, Italy.
    Atac, Ayse
    KTH, Skolan för teknikvetenskap (SCI).
    Bhattacharyya, S.
    Grand Accélérateur National d´lons Lourds, Cean Cedex, France.
    Brock, T.
    Department of Physics, University of York, York, UK.
    Brown, J. R.
    Department of Physics, University of York, York, UK.
    Davies, P.
    Department of Physics, University of York, York, UK.
    Di Nitto, A.
    Dipartimento di Scienze Fisiche, Universitá di Napoli and Instituto Nazionale di Fisica Nucleare, Napoli, Italy.
    Dombrádi, Zs.
    Institute of Nuclear Research of the Hungarian Academy of Science, Debrecen, Hungary.
    Gadea, A.
    IFIC, CSIC, University of Valencia, Valencia, Spain.
    Gál, J.
    Institute of Nuclear Research of the Hungarian Academy of Science, Debrecen, Hungary.
    Hadinia, Baharak
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Johnston-Theasby, F.
    Department of Physics, University of York, York, UK.
    Joshi, P.
    Department of Physics, University of York, York, UK.
    Juhász, K.
    Department of Information Technology, Universty of Debrecen, Debrecen, Hungary.
    Julin, R.
    Department of Physics, University of Jyväskylä, Jyväskylä, Finland.
    Jungclaus, A.
    Instituto de Estructura de la Materia, Madrid, Spain .
    Kalinka, G.
    Institute of Nuclear Research of the Hungarian Academy of Sciences, Debrecen, Hungary.
    Kara, S. O.
    Department of Physics, Ankara University, Tandogan Ankarar, Turkey.
    Khaplanov, Anton
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Kownacki, J.
    Heavy Ion Laboratory, Universty of Warsaw, Warsaw, Poland.
    La Rana, G.
    Dipartimento di Scienze Fisiche, Universitá di Napoli and Instituto Nazionale di Fisica Nucleare, Napoli, Italy.
    Lenzi, S. M.
    Dipartimento di Fisica dell'Universitá di Padova and Instituto Nazionale di Fisica Nucleare, Sezione di Padova, Padova, Italy.
    Molnár, J.
    Institute of Nuclear Research of the Hungarian Academy of Sciences, Debrecen, Hungary.
    Moro, R.
    Dipartimento di Scienze Fisiche, Universitá di Napoli and Instituto Nazionale di Fisica Nucleare, Napoli, Italy.
    Napoli, D. R.
    Instituto Nazionale di Fisica Nucleare, Laboratori Natzionali di Legnaro, Legnaro, Italy.
    Nara Singh, B. S.
    Department of Physics, University of York, York, UK.
    Persson, Andreas
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Recchia, F.
    Dipartimento di Fisica dell'Universitá di Padova and Instituto Nazionale di Fisica Nucleare, Sezione di Padova, Padova, Italy.
    Sandzelius, Mikael
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Scheurer, J. -N
    Université Bordeaux, Centre d'Etudes Nucléaires de Bordeaux Gradignan, Gradignan, France.
    Sletten, G.
    The Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark.
    Sohler, D.
    Institute of Nuclear Research of the Hungarian Academy of Sciences, Debrecen, Hungary.
    Söderström, P. -A
    Department of Physics and Astromony, Uppsala University, Uppsala, Sweden.
    Taylor, M. J.
    Department of Physics, University of York, York, UK.
    Timár, J.
    Institute of Nuclear Research of the Hungarian Academy of Sciences, Debrecen, Hungary.
    Valiente-Dobón, J. J.
    instituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, Legnaro, Italy.
    Vardaci, E.
    Dipartimento di Scienze Fisiche, Universitá di Napoli and Instituto Nazionale di Fisica Nucleare, Napoli, Italy.
    Williams, S.
    TRIUMF, Vancouver, British Columbia, Canada.
    Evidence for a spin-aligned neutron-proton paired phase from the level structure of 92Pd2011Inngår i: Nature, ISSN 0028-0836, E-ISSN 1476-4687, Vol. 469, nr 7328, s. 68-71Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Shell structure and magic numbers in atomic nuclei were generally explained by pioneering work(1) that introduced a strong spin-orbit interaction to the nuclear shell model potential. However, knowledge of nuclear forces and the mechanisms governing the structure of nuclei, in particular far from stability, is still incomplete. In nuclei with equal neutron and proton numbers (N = Z), enhanced correlations arise between neutrons and protons (two distinct types of fermions) that occupy orbitals with the same quantum numbers. Such correlations have been predicted to favour an unusual type of nuclear superfluidity, termed isoscalar neutron-proton pairing(2-6), in addition to normal isovector pairing. Despite many experimental efforts, these predictions have not been confirmed. Here we report the experimental observation of excited states in the N = Z = 46 nucleus Pd-92. Gamma rays emitted following the Ni-58(Ar-36,2n)Pd-92 fusion-evaporation reaction were identified using a combination of state-of-the-art high-resolution c-ray, charged-particle and neutron detector systems. Our results reveal evidence for a spin-aligned, isoscalar neutron-proton coupling scheme, different from the previous prediction(2-6). We suggest that this coupling scheme replaces normal superfluidity (characterized by seniority coupling(7,8)) in the ground and low-lying excited states of the heaviest N = Z nuclei. Such strong, isoscalar neutron-proton correlations would have a considerable impact on the nuclear level structure and possibly influence the dynamics of rapid proton capture in stellar nucleosynthesis.

  • 22.
    Davies, P. J.
    et al.
    Univ York, York YO10 5DD, N Yorkshire, England..
    Bäck, Torbjörn
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Zhu, Y.
    Tokyo Univ Sci, Noda, Chiba 2788510, Japan..
    Toward the limit of nuclear binding on the N = Z line: Spectroscopy of Cd-962019Inngår i: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 99, nr 2, artikkel-id 021302Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A gamma -decaying isomeric state (tau(1/2) = 197(-17)(+19) ns) has been identified in Cd-96, which is one alpha particle away from the last known bound N = Z nucleus, Sn-100. Comparison of the results with shell-model calculations has allowed a tentative experimental level scheme to be deduced and the isomer to be interpreted as a medium-spin negative-parity spin trap based on the coupling of isoscalar (T = 0) and isovector (T = 1) neutron-proton pairs. The data also suggest evidence for the population of a 9(+) T = 1 state, which is predicted by shell-model calculations to be yrast. Such a low-lying T = 1 state, which is unknown in lighter mass even-even self-conjugate nuclei, can also be interpreted in terms of the coupling of T = 0 and T = 1 neutron-proton pairs.

  • 23. Davies, P. J.
    et al.
    Grawe, H.
    Moschner, K.
    Blazhev, A.
    Wadsworth, R.
    Boutachkov, P.
    Ameil, F.
    Yagi, A.
    Baba, H.
    Bäck, Torbjörn
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Dewald, M.
    Doornenbal, P.
    Faestermann, T.
    Gengelbach, A.
    Gerl, J.
    Gernhaeeuserk, R.
    Go, S.
    Gorska, M.
    Gregor, E.
    Isobe, T.
    Jenkins, D. G.
    Hotaka, H.
    Jolie, J.
    Kojouharov, I.
    Kurz, N.
    Lewitowicz, M.
    Lorusso, G.
    Maier, L.
    Merchan, E.
    Naqvi, F.
    Nishibata, H.
    Nishimura, D.
    Nishimura, S.
    Nowacki, F.
    Pietralla, N.
    Schaffne, H.
    Soderstrom, P-A
    Jung, H. S.
    Steiger, K.
    Sumikama, T.
    Taprogge, J.
    Thoele, P.
    Warr, N.
    Watanabe, H.
    Werner, V.
    Xu, Z. Y.
    Yoshinaga, K.
    Zhu, Y.
    The role of core excitations in the structure and decay of the 16(+) spin-gap isomer in Cd-962017Inngår i: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 767, s. 474-479Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The first evidence for beta-delayed proton emission from the 16(+) spin gap isomer in Cd-96 is presented. The data were obtained from the Rare Isotope Beam Factory, at the RIKEN Nishina Center, using the BigRIPS spectrometer and the EURICA decay station. beta p branching ratios for the ground state and 16(+) isomer have been extracted along with more precise lifetimes for these states and the lifetime for the ground state decay of Cd-95. Large scale shell model (LSSM) calculations have been performed and WKB estimates made for l = 0, 2, 4 proton emission from three resonance-like states in Ag-96, that are populated by the beta decay of the isomer, and the results compared to the new data. The calculations suggest that l = 2 proton emission from the resonance states, which reside similar to 5 MeV above the proton separation energy, dominates the proton decay. The results highlight the importance of core-excited wavefunction components for the 16(+) state.

  • 24. Doncel, Maria
    et al.
    Bäck, Torbjörn
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Cullen, D. M.
    Hodge, D.
    Qi, Chong
    Cederwall, Bo
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Taylor, M. J.
    Procter, M.
    Auranen, K.
    Grahn, T.
    Greenlees, P. T.
    Jakobsson, U.
    Julin, R.
    Juutinen, S.
    Herzan, A.
    Konki, J.
    Leino, M.
    Pakarinen, J.
    Partanen, J.
    Peura, P.
    Rahkila, P.
    Ruotsalainen, P.
    Sandzelius, M.
    Saren, J.
    Scholey, C.
    Sorri, J.
    Stolze, S.
    Uusitalo, J.
    Lifetime measurement of the first excited 2(+) state in Te-1122015Inngår i: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 91, nr 6, artikkel-id 061304Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The lifetime of the 2(+) --> 0(g.s.)(+) transition in the neutron-deficicient nucleus Te-112 has been measured for the first time using the DPUNS plunger and the recoil distance Doppler shift technique. The deduced value for the reduced transition probability is B(E2 :0(g.s.)(+) --> 2(+)) = 0.46 +/- 0.04 e(2)b(2), indicating that there is no unexpected enhancement of the B(E2 :0(g.s.)(+) --> 2(+)) values in Te isotopes below the midshell. The result is compared to and discussed in the framework of large-scale shell-model calculations.

  • 25.
    Doncel, Maria
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Bäck, Torbjörn
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Qi, C.
    Cullen, D. M.
    Hodge, D.
    Cederwall, Bo
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Taylor, M. J.
    Procter, M.
    Giles, M.
    Auranen, K.
    Grahn, T.
    Greenlees, P. T.
    Jakobsson, U.
    Julin, R.
    Juutinen, S.
    Herzáň, A.
    Konki, J.
    Pakarinen, J.
    Partanen, J.
    Peura, P.
    Rahkila, P.
    Ruotsalainen, P.
    Sandzelius, M.
    Sarén, J.
    Scholey, C.
    Sorri, J.
    Stolze, S.
    Uusitalo, J.
    Spin-dependent evolution of collectivity in Te 1122017Inngår i: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 96, nr 5, artikkel-id 051304Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The evolution of collectivity with spin along the yrast line in the neutron-deficient nucleus Te112 has been studied by measuring the reduced transition probability of excited states in the yrast band. In particular, the lifetimes of the 4+ and 6+ excited states have been determined by using the recoil distance Doppler-shift method. The results are discussed using both large-scale shell-model and total Routhian surface calculations.

  • 26. Erni, L.
    et al.
    Bäck, Torbjörn
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Cederwall, Bo
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    et, al,
    Technical design report for the PANDA (AntiProton Annihilations at Darmstadt) Straw Tube Tracker2013Inngår i: European Physical Journal A, ISSN 1434-6001, E-ISSN 1434-601X, Vol. 49, nr 2Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    This document describes the technical layout and the expected performance of the Straw Tube Tracker (STT), the main tracking detector of the PANDA target spectrometer. The STT encloses a Micro-Vertex-Detector (MVD) for the inner tracking and is followed in beam direction by a set of GEM stations. The tasks of the STT are the measurement of the particle momentum from the reconstructed trajectory and the measurement of the specific energy loss for a particle identification. Dedicated simulations with full analysis studies of certain proton-antiproton reactions, identified as being benchmark tests for the whole PANDA scientific program, have been performed to test the STT layout and performance. The results are presented, and the time lines to construct the STT are described.

  • 27.
    Ertoprak, Aysegul
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Fysik. Istanbul University Vezneciler/Fatih, Istanbul, Turkey.
    Cederwall, Bo
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Jakobsson, U.
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Nyako, B. M.
    Nyberg, J.
    Davies, P.
    Doncel, Maria
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    De France, G.
    Kuti, I.
    Napoli, D. R.
    Wadsworth, R.
    Ghugre, S. S.
    Raut, R.
    Akkus, B.
    Al-Azri, H.
    Algora, A.
    de Angelis, G.
    Atac, A.
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Bäck, Torbjörn
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Boso, A.
    Clement, E.
    Debenham, D. M.
    Dombradi, Zs.
    Erturk, S.
    Gadea, A.
    Ghazi Moradi, Farnaz
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Gottardo, A.
    Huyuk, T.
    Ideguchi, E.
    Jaworski, G.
    Li, H.
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Michelagnoli, C.
    Modamio, V.
    Palacz, M.
    Petrache, C. M.
    Recchia, F.
    Sandzelius, M.
    Siciliano, M.
    Timar, J.
    Valiente-Dobon, J. J.
    Xiao, Z. G.
    LIFETIME MEASUREMENTS WITH THE DOPPLER SHIFT ATTENUATION METHOD USING A THICK HOMOGENEOUS PRODUCTION TARGET - VERIFICATION OF THE METHOD2017Inngår i: Acta Physica Polonica B, ISSN 0587-4254, E-ISSN 1509-5770, Vol. 48, nr 3, s. 325-329Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Doppler Shift Attenuation Method (DSAM) analysis of excited-state lifetimes normally employs thin production targets mounted on a thick stopper foil ("backing") serving to slow down and stop the recoiling nuclei of interest in a well-defined manner. Use of a thick, homogeneous production target leads to a more complex analysis as it results in a substantial decrease in the energy of the incident projectile which traverses the target with an associated change in the production cross section of the residues as a function of penetration depth. Here, a DSAM lifetime analysis using a thick homogeneous target has been verified using the Doppler broadened lineshapes of gamma rays following the decay of highly excited states in the semi-magic (N = 50) nucleus Ru-94. Lifetimes of excited states in the Ru-94 nucleus have been obtained using a modified version of the LINESHAPE package from the Doppler broadened lineshapes resulting from the emission of the gamma rays, while the residual nuclei were slowing down in the thick (6 mg/cm(2)) metallic Ni-58 target. The results have been validated by comparison with a previous measurement using a different (RDDS) technique.

  • 28.
    Ghazi Moradi, Farnaz
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Bäck, Torbjörn
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Cederwall, Bo
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Sandzelius, Mikael
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Atac, Ayse
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Johnson, Arne
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Qi, Chong
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Liotta, Roberto
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Partikel- och astropartikelfysik.
    Hadinia, Baharak
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Andgren, Karin
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Khaplanov, Anton
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Wyss, Ramon
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Eeckhaudt, S.
    Department of Physics, University of Jyväskylä, Jyväskylä, Finland.
    Grahn, T.
    Department of Physics, University of Jyväskylä, Jyväskylä, Finland.
    Greenlees, P. T.
    Department of Physics, University of Jyväskylä, Jyväskylä, Finland.
    Jones, P. M.
    Department of Physics, University of Jyväskylä, Jyväskylä, Finland.
    Julin, R.
    Department of Physics, University of Jyväskylä, Jyväskylä, Finland.
    Juutinen, S.
    Department of Physics, University of Jyväskylä, Jyväskylä, Finland.
    Ketelhut, S.
    Department of Physics, University of Jyväskylä, Jyväskylä, Finland.
    Leino, M.
    Department of Physics, University of Jyväskylä, Jyväskylä, Finland.
    Nyman, M.
    Department of Physics, University of Jyväskylä, Jyväskylä, Finland.
    Rahkila, P.
    Department of Physics, University of Jyväskylä, Jyväskylä, Finland.
    Sarén, J.
    Department of Physics, University of Jyväskylä, Jyväskylä, Finland.
    Scholey, C.
    Department of Physics, University of Jyväskylä, Jyväskylä, Finland.
    Sorri, J.
    Department of Physics, University of Jyväskylä, Jyväskylä, Finland.
    Uusitalo, J.
    Department of Physics, University of Jyväskylä, Jyväskylä, Finland.
    Ganioglu, E.
    Science Faculty, Physics Department, Istanbul University, Istanbul, Turkey.
    Thomson, J.
    Oliver Lodge Laboratory, University of Liverpool, Liverpool, UK.
    Joss, D. T.
    Oliver Lodge Laboratory, University of Liverpool, Liverpool, UK.
    Page, R. D.
    Oliver Lodge Laboratory, University of Liverpool, Liverpool, UK.
    Ertürk, S.
    CCLRC Daresbury Laboratory, Daresbury, Warrington, UK.
    Simpson, J.
    CCLRC Daresbury Laboratory, Daresbury, Warrington, UK.
    Gomez Hornillos, M. B.
    Seccio d'Enginyeria Nuclear, Universitat Politecnica de Catalunya, Barcelona, Spain.
    Bianco, L.
    Department of Physics, University of Guelph, Ontario, Canada.
    High-spin study of 162Ta2011Inngår i: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 84, nr 6, s. 064312-Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Excited states in the odd-odd neutron deficient nucleus (162)Ta (Z = 73, N = 89) have been studied for the first time. The gamma spectroscopy analysis using gamma - gamma - gamma coincidences revealed a strongly coupled rotational structure that was established up to large angular momentum states. The rotational band was assigned to the configuration pi h(11/2)[514]9/2 circle times nu i(13/2)[660]1/2 based on its rotational and electromagnetic properties. The data are interpreted within the framework of total Routhian surface calculations, which suggests an axially symmetric shape with a gamma-softminimum at beta(2) approximate to 0.16 and gamma approximate to 6 degrees. The crossing of the signature partners observed in heavier (N >= 91) odd-odd nuclides in this mass region is found to be absent at N = 89. This might be correlated with a change in S-band structure above the paired band crossing at these neutron numbers.

  • 29.
    Ghazi Moradi, Farnaz
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Cederwall, Bo
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Qi, Chong
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Bäck, Torbjörn
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Ataç, Ayşe
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Liotta, Roberto
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Doncel, Maria
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Johnson, Arne
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    de France, G.
    Clement, E.
    Nyberg, J.
    Gengelbach, A.
    Nyako, B. M.
    Gal, J.
    Kalinka, G.
    Molnar, J.
    Timar, J.
    Sohler, D.
    Dombradi, Zs.
    Kuti, I.
    Juhasz, K.
    Napoli, D. R.
    Gottardo, A.
    Modamio, V.
    Wadsworth, R.
    Henry, T. W.
    Nichols, A. J.
    Al-Azri, H.
    Palacz, M.
    Ideguchi, E.
    Aktas, O.
    Di Nitto, A.
    Dijon, A.
    Hueyuek, T.
    Jaworski, G.
    John, P. R.
    Yilmaz, B.
    Spectroscopy of the neutron-deficient N=50 nucleus Rh-952014Inngår i: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 89, nr 4, s. 044310-Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The neutron-deficient semimagic (neutron number N = 50) Rh-95 nucleus has been produced at high spins using the projectile-target system Ca-40 + Ni-58 at 125 MeV beam energy. The gamma-decays of levels populated by the 3p fusion evaporation reaction channel were studied using gamma-gamma coincidences, and 20 new gamma-ray transitions involving 15 new positive-and negative-parity states were observed. Spin and parity for many of the excited states were firmly deduced for the first time using the combined directional angular correlation and direction-polarization techniques. The observed structures are discussed within the framework of large-scale shell model calculations. E1 transition strengths were deduced and used together with the results of the shell model calculations to study the contribution of different particle-hole configurations, in particular for analyzing contributions from core-excited configurations.

  • 30.
    Ghazi Moradi, Farnaz
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Qi, Chong
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Cederwall, Bo
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Ataç, Ayşe
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Bäck, Torbjörn
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Liotta, Roberto
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Doncel, Maria
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Johnson, Arne
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    et al.,
    Character of particle-hole excitations in Ru-94 deduced from gamma-ray angular correlation and linear polarization measurements2014Inngår i: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 89, nr 1, s. 0143011-0143019Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Linear polarization and angular correlations of γ-rays depopulating excited states in the neutron-deficient nucleus 9444Ru50 have been measured, enabling firm spin-parity assignments for several excited states in this nucleus. The deduced multipolarities of strong transitions in the yrast structure were found to be mostly of stretched M1, E1, and E2 types and, in most cases, in agreement with previous tentative assignments. The deduced multipolarity of the 1869 keV and the connecting 257 and 1641 keV transitions indicates that the state at 6358 keV excitation energy has spin parity 12−1 rather than 12+3 as proposed in previous works. The presence of a 12−1 state is interpreted within the framework of large-scale shell-model calculations as a pure proton-hole state dominated by the π(p−11/2⊗g−59/2) and π(p−13/2⊗g−59/2) configurations. A new positive-parity state is observed at 6103 keV and is tentatively assigned as 12+2. The 14−1 state proposed earlier is reassigned as 13−4 and is interpreted as being dominated by neutron particle-hole core excitations. The strengths of several E1 transitions have been measured and are found to provide a signature of core-excited configurations.

  • 31.
    Hadinia, Baharak
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Cederwall, Bo
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Joss, Dave
    CCLRC, Daresbury Laboratory, Warrington.
    Wyss, Ramon
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Page, Robert
    Oliver Lodge Laboratory, Department of Physics, University of Liverpool.
    Johnson, Arne
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Lagergren, Karin
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Ganioğlu, Ela
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Andgren, Karin
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Bäck, Torbjörn
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Liotta, Roberto
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Sandzelius, Mikael
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    et al.,
    In-beam gamma-ray and alpha-decay spectroscopy of 170Ir2007Inngår i: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 76, nr 4, s. 044312-1-044312-8Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Excited states in the highly neutron deficient odd-odd nucleus Ir-170 have been investigated. The experiment was performed using the Sn-112(Ni-60, pn)Ir-170 reaction and employing the recoil-decay tagging technique. Gamma rays were detected using the JUROGAM gamma-ray spectrometer and those belonging to Ir-170 were selected based on recoil identification provided by the RITU gas-filled recoil separator and the GREAT spectrometer at the RITU focal plane. A partial level scheme of Ir-170 is presented for the first time. New alpha-decay branches are assigned to Ir-170 and a tentative level structure for Re-166 is deduced from a study of the alpha-decay fine structure and the associated alpha-gamma correlations.

  • 32.
    Hadinia, Baharak
    et al.
    KTH, Tidigare Institutioner                               , Fysik.
    Cederwall, Bo
    KTH, Tidigare Institutioner                               , Fysik.
    Lagergren, Karin
    KTH, Tidigare Institutioner                               , Fysik.
    Blomqvist, Jan
    KTH, Tidigare Institutioner                               , Fysik.
    Bäck, Torbjörn
    KTH, Tidigare Institutioner                               , Fysik.
    Johnson, Arne
    KTH, Tidigare Institutioner                               , Fysik.
    Liotta, Roberto
    KTH, Tidigare Institutioner                               , Fysik.
    et al.,
    First identification of gamma-ray transitions in 107Te2004Inngår i: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 70, nr 6, s. 064314-1-064314-4Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Gamma-ray transitions in Te-107 have been identified for the first time. The experiment, which utilized the recoil decay tagging technique, was performed at the accelerator laboratory of the University of Jyvaskyla, Finland. Prompt gamma rays produced in Ni-58(Cr-52,3n)Te-107(*) reactions were detected by the JUROGAM gamma-ray spectrometer. The gamma rays belonging to Te-107 were selected based on the recoil identification provided by the RITU gas-filled recoil separator and the GREAT focal plane spectrometer. A first excited state at 90 keV, tentatively of g(7/2) character, is proposed.

  • 33.
    Hadinia, Baharak
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Cederwall, Bo
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Page, R. D.
    Sandzelius, Mikael
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Scholey, C.
    Andgren, Karin
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Bäck, Torbjörn
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Ganioglu, E.
    Hornillos, M. B. G.
    Grahn, T.
    Greenlees, P. T.
    Ideguchi, E.
    Jakobsson, U.
    Johnson, Arne
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Jones, P. M.
    Julin, R.
    Juutinen, J.
    Ketelhut, S.
    Khaplanov, Anton
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Leino, M.
    Niikura, M.
    Nyman, M.
    Ozgur, I.
    Paul, E. S.
    Peura, P.
    Rahkila, P.
    Saren, J.
    Sorri, J.
    Uusitalo, J.
    Wyss, Ramon
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Identification of gamma rays from Au-172 and alpha decays of Au-172, Ir-168, and Re-1642009Inngår i: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 80, nr 6, s. 064310-Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The very neutron deficient odd-odd nucleus Au-172 was studied in reactions of 342 and 348 MeV Kr-78 beams with an isotopically enriched Ru-96 target. The alpha decays previously reported for Au-172 were confirmed and the decay chain extended down to Tm-152 through the discovery of a new alpha-decaying state in Re-164 [E-alpha=5623(10) keV; t(1/2)=864(-110)(+150) ms; b(alpha)=3(1)%]. Fine structure in these alpha decays of Au-172 and Ir-168 were identified. A new alpha-decaying state was also observed and assigned as the ground state in Au-172 [E-alpha=6762(10) keV; t(1/2)=22(-5)(+6) ms]. This decay chain was also correlated down to Tm-152 through previously reported alpha decays. Prompt gamma rays from excited states in Au-172 have been identified using the recoil-decay tagging technique. The partial level scheme constructed for Au-172 indicates that it has an irregular structure. Possible configurations of the alpha-decaying states in Au-172 are discussed in terms of the systematics of nuclei in this region and total Routhian surface calculations.

  • 34.
    Haefner, G.
    et al.
    Univ Cologne, Inst Kernphys, Cologne, Germany. outachkov, P.; Ameil, F.; Gerl, J.; Gorska, M.; Grawe, H.; Kojouharov, I; Kurz, N.; Schaffner, H..
    Bäck, Torbjörn
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Zhu, Y.
    Tokyo Univ Sci, Shinjuku City, Tokyo, Japan.
    et al.,
    PROPERTIES OF gamma-DECAYING ISOMERS IN THE Sn-100 REGION REVISITED2019Inngår i: Acta Physica Polonica B, ISSN 0587-4254, E-ISSN 1509-5770, Vol. 50, nr 3, s. 431-437Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The study of nuclei in the region around the N = Z doubly-magic nucleus -100 has been of long standing interest for the nuclear structure and clear astrophysics. Recently, Park et al. have reported on properties gamma-decaying isomers and isomeric ratios in the vicinity of Sn-100. at experiment was performed at the Radioactive Ion Beam Factory (RIBF) the RIKEN Nishina Center in Japan as a part of the EURICA campaign. utron-deficient nuclei were produced in a fragmentation reaction of a -124 primary beam on a 9 Be target at an energy of 345 MeV/A. condary ions were separated and identified in the BigRIPS fragment parator and implanted in the silicon detector array WAS3ABi. The data esented here were obtained in another experiment performed at the RIBF ing the same reaction but slightly different separator settings. New sults of ratios of isomeric population and half-lives of mma-decaying isomers populated in the experiment are presented.

  • 35. Häfner, G.
    et al.
    Moschner, K.
    Blazhev, A.
    Boutachkov, P.
    Davies, P. J.
    Wadsworth, R.
    Ameil, F.
    Baba, H.
    Bäck, Torbjörn
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Dewald, M.
    Doornenbal, P.
    Faestermann, T.
    Gengelbach, A.
    Gerl, J.
    Gernhaüser, R.
    Go, S.
    Górska, M.
    Grawe, H.
    Gregor, E.
    Hotaka, H.
    Isobe, T.
    Jenkins, D. G.
    Jolie, J.
    Jung, H. S.
    Kojouharov, I.
    Kurz, N.
    Lewitowicz, M.
    Lorusso, G.
    Lozeva, R.
    Merchan, E.
    Naqvi, F.
    Nishibata, H.
    Nishimura, D.
    Nishimura, S.
    Pietralla, N.
    Schaffner, H.
    Söderström, P. -A
    Steiger, K.
    Sumikama, T.
    Taprogge, J.
    Thöle, P.
    Watanbe, H.
    Warr, N.
    Werner, V.
    Xu, Z. Y.
    Yagi, A.
    Yoshinaga, K.
    Zhu, Y.
    Properties of γ-decaying isomers in the Sn 100 region populated in fragmentation of a Xe 124 beam2019Inngår i: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 100, nr 2, artikkel-id 024302Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A systematic study was performed of microsecond γ-decaying isomers around Sn100 produced in a fragmentation reaction of a Xe124 beam at 345 MeV/u at the Radioactive Ion Beam Factory of the RIKEN Nishina Center in Saitama, Japan. Half-lives of isomeric states in that region were remeasured allowing us to improve the currently available experimental information. Reduced transition probabilities were deduced and compared to shell-model calculations in various model spaces. The recently reported low-energy transitions in Rh92 and Ag96 were remeasured with improved precision. Additionally, experimental information on isomeric ratios, including five new ones, were extracted and compared to a previous experimental study and the sharp cutoff model of fragmentation reaction.

  • 36. Ideguchi, E.
    et al.
    Cederwall, Bo
    KTH, Tidigare Institutioner, Fysik.
    Bäck, Torbjörn
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Milechina, Larissa
    Gono, Y.
    Yang, Y. F.
    Aoi, N.
    Teranishi, T.
    Bucurescu, D.
    Kishida, T.
    Position sensitivity of a segmented planar Ge detector2003Inngår i: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 496, nr 03-feb, s. 373-384Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A method to extract depth of interaction information for gamma-rays in a segmented planar Ge detector is presented. The method is demonstrated on signals from a segmented detector which were stored by a digital oscilloscope event by event and analysed off-line. Event samples were acquired for different interaction points in the detector. A Compton scatter coincidence detection technique ensured that the event samples were highly enriched in single-interaction events. By analysing pulse shapes and the relative timing between anode pulses and the pulses from the irradiated cathode segment, a position sensitivity of 1-2 mm in the depth direction was deduced. A similar transverse position sensitivity was inferred by studying image charge pulses on neighbouring segments.

  • 37. Ideguchi, E.
    et al.
    Cederwall, Bo
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Ganioglu, Ela
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Hadinia, Baharak
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Lagergren, Karin
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Bäck, Torbjörn
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Johnson, Arne
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Wyss, Ramon
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Eeckhaudt, S.
    Grahn, T.
    Greenlees, P.
    Julin, R.
    Juutinen, S.
    Kettunen, H.
    Leino, M.
    Leppanen, A. P.
    Nieminen, P.
    Nyman, M.
    Pakarinen, J.
    Rahkila, P.
    Scholey, C.
    Uusitalo, J.
    Joss, D. T.
    Paul, E. S.
    Wiseman, D. R.
    Wadsworth, R.
    Afanasjev, A. V.
    Ragnarsson, I.
    High-spin intruder band in In-1072010Inngår i: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 81, nr 3, s. 034303-Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    High-spin states in the neutron-deficient nucleus In-107 were studied via the Ni-58(Cr-52,3p) reaction. In-beam gamma rays were measured using the JUROGAM detector array. A rotational cascade consisting of ten gamma-ray transitions, which decays to the 19/2(+) level at 2.002 MeV, was observed. The band exhibits the features typical for smooth terminating bands that also appear in rotational bands of heavier nuclei in the A similar to 100 region. The results are compared with total Routhian surface and cranked Nilsson-Strutinsky calculations.

  • 38.
    Ideguchi, Eiji
    et al.
    KTH, Tidigare Institutioner, Fysik.
    Cederwall, Bo
    KTH, Tidigare Institutioner, Fysik.
    Wyss, Ramon
    KTH, Tidigare Institutioner, Fysik.
    Bäck, Torbjörn
    KTH, Tidigare Institutioner, Fysik.
    Lagergren, Karin
    KTH, Tidigare Institutioner, Fysik.
    Johnson, Arne
    KTH, Tidigare Institutioner, Fysik.
    Klamra, Wlodzimierz
    KTH, Tidigare Institutioner, Fysik.
    Cederkäll, Joakim
    KTH, Tidigare Institutioner, Fysik.
    Devlin, M
    Elson, J
    LaFosse, R
    Lerma, F
    Sarantites, G
    Tomov, V
    Hausmann, M
    Jungclaus, A
    Napoli, R
    Carpenter, P
    Janssens, F
    Kondev, G
    Lauritsen, T
    Lister, J
    Seweryniak, D
    Wiedenhoever, I
    Clark, M
    Fallon, P
    Lee, Y
    Macchiavelli, O
    Macleod, W
    Superdeformation in 91Tc2000Inngår i: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 492, nr 3-4, s. 245-253Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A high-spin rotational band with 11 gamma -ray transitions has barn observed in Tc-91. The dynamical moment of inertia as well as the transition quadrupole moment of 8.1(-1.4)(+1.9) eb measured for this band show the characteristics of a superdeformed band. However, the shape is more elongated than in the neighbouring A = 80-90 superdeformed nuclei. Theoretical interpretations of the band within the cranked Strutinsky approach based on two different Woods-Saxon potential parameterisations are presented. Even though an unambiguous configuration assignment proved difficult, both calculations indicate a larger deformation and at least three additional high-N intruder orbitals occupied compared to the lighter SD nuclei. (C) 2000 Elsevier Science B.V. All rights reserved.

  • 39. Jonsson, K
    et al.
    Cederwall, Bo
    Johnson, A
    Wyss, R
    Bäck, Torbjörn
    Cederkall, J
    Devlin, M
    Elson, J
    LaFosse, D R
    Lerma, F
    Sarantites, D G
    Clark, R M
    Lee, I Y
    Macchiavelli, A O
    Macleod, R W
    Collective excitations and band termination in Nb-851999Inngår i: Nuclear Physics A, ISSN 0375-9474, E-ISSN 1873-1554, Vol. 645, nr 1, s. 47-60Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    High-spin states in Nb-85 were studied using the GAMMASPHERE Ge detector array and the MICROBALL charged-particle detector system. Three gamma-ray cascades with collective rotational characteristics were observed. One of the bands exhibits a forking at the top, most likely reflecting the termination of one branch into a favoured non-collective, near spherical state. The data are interpreted in terms of cranked Strutinsky-type calculations.

  • 40. Joss, D. T.
    et al.
    Amzal, N.
    Appelbe, D. E.
    Bäck, Torbjörn
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Cederwall, Bo
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Hadinia, Baharak
    Lagergren, Karin
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Wyss, Ramon
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Probing structural changes in the very neutron-deficient Os isotopes with recoil-decay tagging2005Inngår i: Journal of Physics G: Nuclear and Particle Physics, ISSN 0954-3899, E-ISSN 1361-6471, Vol. 31, nr 10, s. S1593-S1598Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In recent years, the exploitation of the iecoil-decay tagging (RDT) technique with,large arrays of germanium detectors has revealed much information about the structure of heavy nuclei approaching the proton drip line. The yrast bands of the N <= 93 osmium isotopes have been identified in a campaign of tagging experiments using various spectrometer arrays coupled to the RITU gas-filled separator based at the University of Jyvaskyla. Trends in the yrast state excitation energies have indicated a transition from gamma-soft triaxial to near-spherical shapes with decreasing neutron number. Recent experimental results for Os-162 obtained with the JUROGAM and GREAT spectrometers also indicate the importance of configurations involving the h(9/2) neutron states as the N = Z 82 shell gaps are approached.

  • 41. Joss, D. T.
    et al.
    King, S. L.
    Page, R. D.
    Simpson, J.
    Keenan, A.
    Amzal, N.
    Bäck, Torbjörn
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Bentley, M. A.
    Cederwall, Bo
    KTH, Tidigare Institutioner, Fysik.
    Cocks, J. F. C.
    Cullen, D. M.
    Greenlees, P. T.
    Helariutta, K.
    Jones, P. M.
    Julin, R.
    Juutinen, S.
    Kankaanpaa, H.
    Kettunen, H.
    Kuusiniemi, P.
    Leino, M.
    Muikku, M.
    Savelius, A.
    Uusitalo, J.
    Williams, S. J.
    Identification of excited states in Os-167 and Os-168: shape coexistence at extreme neutron deficiency2001Inngår i: Nuclear Physics A, ISSN 0375-9474, E-ISSN 1873-1554, Vol. 689, nr 04-mar, s. 631-654Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Excited states in the very neutron-deficient isotopes Os-167 and Os-168 have been observed using the reaction Sn-112(Ni-58, 2pxn). The JUROSPHERE gamma -ray spectrometer array was used in conjunction with the RITU gas-filled recoil separator to collect prompt gamma radiation in coincidence with recoils implanted in a silicon strip detector located at the focal plane of RITU. Using a selective recoil decay tagging technique it has been possible to unambiguously assign gamma -ray transitions to Os-167 and Os-168 through the characteristic a radioactivity of these nuclides. The high-spin structure of the bands is discussed in terms of quasiparticle configurations within the framework of the cranked shell model. The role of shape coexistence in Os-168 is examined with phenomenological three-band mixing calculations.

  • 42. Joss, D. T.
    et al.
    Simpson, J.
    Page, R. D.
    King, S. L.
    Amzal, N.
    Appelbe, D. E.
    Bäck, Torbjörn
    KTH, Tidigare Institutioner, Fysik.
    Bentley, M. A.
    Cederwall, Bo
    KTH, Tidigare Institutioner, Fysik.
    Cocks, J. F. C.
    Cullen, D. M.
    Greenlees, P. T.
    Helariutta, K.
    Jones, P. M.
    Julin, R.
    Juutinen, S.
    Kankaanpää, H.
    Keenan, A.
    Kettunen, H.
    Kuusiniemi, P.
    Leino, M.
    Muikku, M.
    Savelius, A.
    Uusitalo, J.
    Warner, D. D.
    Williams, S. J.
    Wyss, Ramon
    KTH, Tidigare Institutioner, Fysik.
    Yrast spectroscopy in the neutron-deficient nucleus Os-1692002Inngår i: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 66, nr 5Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Excited states in the neutron-deficient isotope Os-169 have been identified for the first time in an experiment using the Jurosphere gamma-ray spectrometer in conjunction with the Ritu gas-filled recoil separator. The problems associated with identifying neutron-deficient isotopes produced with low fusion cross sections against a high background of competing channels, including fission, have been overcome by using the recoil-decay tagging technique. The band structures observed in Os-169 are interpreted in the context of the systematics of neighboring nuclei and the predictions of cranked Woods-Saxon calculations. The systematics of the second (i(13/2))(2) neutron alignment in this region are discussed.

  • 43. Joss, D. T.
    et al.
    Simpson, J.
    Paul, E. S.
    Page, R. D.
    Amzal, N.
    Appelbe, D. E.
    Bäck, Torbjörn
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Cederwall, Bo
    KTH, Tidigare Institutioner, Fysik.
    Cocks, J. F. C.
    Cullen, D. M.
    Greenlees, P. T.
    Helariutta, K.
    Jones, P. M.
    Julin, R.
    Juutinen, S.
    Kankaanpää, H.
    Keenan, A.
    Kettunen, H.
    King, S. L.
    Kuusiniemi, P.
    Leino, M.
    Muikku, M.
    Savelius, A.
    Uusitalo, J.
    Strongly coupled bands in the neutron-deficient nucleus Re-1672003Inngår i: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 68, nr 1Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Excited states in the neutron-deficient nucleus Re-167 have been observed in a recoil-tagging experiment performed with the Jurosphere gamma-ray spectrometer in conjunction with the RITU gas-filled recoil separator. The low-spin yrast band, based on a proton h(11/2) orbital, comprises a strongly coupled band and exhibits significant signature splitting, indicative of a triaxial shape with gamma<0degrees. At higher spin the rotational alignment of a pair of i(13/2) neutrons induces a transition to an axial prolate shape resulting in a drastic reduction of the signature splitting. Two other strongly coupled bands have been established and their structures are discussed in terms of quasiparticle configurations.

  • 44. King, S L
    et al.
    Simpson, J
    Page, R D
    Amzal, N
    Bäck, Torbjörn
    Cederwall, Bo
    Cocks, J F C
    Cullen, D M
    Greenlees, P T
    Harder, M K
    Helariutta, K
    Jones, P
    Julin, R
    Juutinen, S
    Kankaanpaa, H
    Keenan, A
    Kettunen, H
    Kuusiniemi, P
    Leino, M
    Lemmon, R
    Muikku, M
    Savelius, A
    Uusitalo, J
    Van Isacker, P
    First observation of excited states in the neutron deficient nuclei (PT)-P-168 and Pt-1701998Inngår i: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 443, nr 1-4, s. 82-88Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Excited states have been observed for the first time in (XPt)-X-168 and Pt-170 using the alpha-decay recoil-tagging technique. The trend of decreasing deformation moving away from the N = 104 mid-shell continues far Pt-170 but the structure of Pt-168 is significantly different. The low spin level energy systematics in Pt168-184 are presented and discussed within the framework of the interacting boson model. (C) 1998 Elsevier Science B.V. All rights reserved.

  • 45. Kishida, T.
    et al.
    Watanabe, H.
    Ideguchi, E.
    Kubo, T.
    Yang, Y. F.
    Ishihara, M.
    Yamamoto, S.
    Gono, Y.
    Morikawa, T.
    Tsutsumi, T.
    Fukuchi, T.
    Motomura, S.
    Tsuchida, H.
    Kashiyama, O.
    Saitoh, K.
    Shibata, M.
    Odahara, A.
    Zhang, Y. H.
    Zhou, X. H.
    Cederwall, Bo
    KTH, Tidigare Institutioner, Fysik.
    Bäck, Torbjörn
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Bucurescu, D.
    High-spin isomeric beam line2002Inngår i: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 484, nr 03-jan, s. 45-55Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A high-spin isomeric beam line has been constructed at RIKEN based on the inverse kinematics of fusion-evaporation reactions. The beam line provides high-spin isomers as secondary beams, whose intensity is more than 10(5) sec(-1). The characteristics and the present status of the beam line are described.

  • 46.
    Lagergren, K
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Cederwall, Bo
    KTH, Tidigare Institutioner, Fysik.
    Bäck, Torbjörn
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Wyss, Ramon
    KTH, Tidigare Institutioner, Fysik.
    Ideguchi, E.
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Johnson, Arne
    KTH, Tidigare Institutioner, Fysik.
    Atac, Ayse
    Axelsson, A.
    Azaiez, F.
    Bracco, A.
    Cederkäll, Joakim
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Dombradi, Z.
    Fahlander, C.
    Gadea, A.
    Million, B.
    Petrache, C. M.
    Rossi-Alvarez, C.
    Sampson, J. A.
    Sohler, D.
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Weiszflog, M.
    Coexistence of superdeformed shapes in Er-1542001Inngår i: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 8702, nr 2Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A new superdeformed rotational band has been observed in Er-154 using the Euroball Ge detector array. The new band and the one previously observed can be understood as based on coexisting superdeformed structures at prolate and triaxial shapes, respectively. The observation resolves long-standing difficulties in the theoretical interpretation of superdeformed states in Er-154.

  • 47.
    Lagergren, K
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Cederwall, Bo
    KTH, Tidigare Institutioner, Fysik.
    Johnson, Arne
    KTH, Tidigare Institutioner, Fysik.
    Blomqvist, J.
    Sohler, D.
    de Angelis, G.
    Bednarczyk, P.
    Bäck, Torbjörn
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Claesson, T.
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Dorvaux, O.
    Farnea, E.
    Gadea, A.
    Gorska, M.
    Milechina, Larissa
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Norlin, L. O.
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Odahara, A.
    Palacz, M.
    Stefanescu, I.
    Thelen, O.
    Vivien, J. P.
    Evidence for excited states in Ag-952002Inngår i: European Physical Journal A, ISSN 1434-6001, E-ISSN 1434-601X, Vol. 14, nr 4, s. 393-396Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The first evidence for excited states in Ag-95 is presented. Ag-95 is the heaviest T-z = 1/2 nucleus for which gamma-rays have been identified. The reaction Ca-40(Ni-58, 1p2n)Ag-95 was used in the experiment, which resulted in the assignment of three gamma-rays to Ag-95. A detector system consisting of the detector arrays Euroball, Neutron Wall and Euclides was used to detect gamma-rays, neutrons and charged particles, respectively.

  • 48.
    Li, Hongjie
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik. Tsinghua University, People's Republic of China.
    Cederwall, Bo
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Bäck, Torbjörn
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Qi, Chong
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Doncel, Maria
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Jakobsson, Ulrika
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik. University of Jyvaskyla, Finland.
    Auranen, K.
    Boenig, S.
    Drummond, M. C.
    Grahn, T.
    Greenlees, P.
    Herzan, A.
    Julin, R.
    Juutinen, S.
    Konki, J.
    Kroell, T.
    Leino, M.
    McPeake, C.
    O'Donnell, D.
    Page, R. D.
    Pakarinen, J.
    Partanen, J.
    Peura, P.
    Rahkila, P.
    Ruotsalainen, P.
    Sandzelius, M.
    Saren, J.
    Saygi, B.
    Scholey, C.
    Sorri, J.
    Stolze, S.
    Taylor, M. J.
    Thornthwaite, A.
    Uusitalo, J.
    Xiao, Z. G.
    Recoil-decay tagging spectroscopy of W-162(74)882015Inngår i: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 92, nr 1, artikkel-id 014326Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Excited states in the highly neutron-deficient nucleus W-162 have been investigated via the Mo-92(Kr-78, 2 alpha) W-162 reaction. Prompt gamma rays were detected by the JUROGAM II high-purity germanium detector array and the recoiling fusion-evaporation products were separated by the recoil ion transport unit (RITU) gas-filled recoil separator and identified with the gamma recoil electron alpha tagging (GREAT) spectrometer at the focal plane of RITU. gamma rays from W-162 were identified uniquely using mother-daughter and mother-daughter-granddaughter alpha-decay correlations. The observation of a rotational-like ground-state band is interpreted within the framework of total Routhian surface (TRS) calculations, which suggest an axially symmetric ground-state shape with a gamma-soft minimum at beta(2) approximate to 0.15. Quasiparticle alignment effects are discussed based on cranked shell model calculations. New measurements of the W-162 ground-state alpha-decay energy and half-life were also performed. The observed alpha-decay energy agrees with previous measurements. The half-life of W-162 was determined to be t(1/2) = 990(30) ms. This value deviates significantly from the currently adopted value of t(1/2) = 1360(70) ms. In addition, the alpha-decay energy and half-life of Os-166 were measured and found to agree with the adopted values.

  • 49.
    Li, Hongjie
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik. Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China.
    Cederwall, Bo
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Doncel, Maria
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Bäck, Torbjörn
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Jakobsson, Ulrika
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik. Univ Jyvaskyla, Dept Phys, POB 35, FI-40014 Jyvaskyla, Finland.
    Xiao, Z. G.
    et al.,
    Lifetime measurements in Re-166: Collective versus magnetic rotation2016Inngår i: PHYSICAL REVIEW C, ISSN 2469-9985, Vol. 93, nr 3, artikkel-id 034309Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Lifetimes of excited states in the neutron-deficient odd-odd nucleus Re-166 have been measured for the first time using the recoil distance Doppler-shift method. The measured lifetime for the (8(-)) state; tau = 480 (80) ps, enabled an assessment of the multipolarities of the gamma rays depopulating this state. Information on electromagnetic transition strengths were deduced for the gamma-ray transitions from the (9(-)), (10(-)), and (11(-)) states, and in the case of the (10(-)) and (11(-)) states limits on the B (M1) and B(E2) strengths were estimated. The results are compared with total Routhian surface predictions and semiclassical calculations. Tilted-axis cranking calculations based on a relativistic mean-field approach (TAC-RMF) have also been performed in order to test the possibility of magnetic rotation in the 166Re nucleus. While the TAC-RMF calculations predict a quadrupole-deformed nuclear shape with similar beta(2) deformation as obtained by using the TRS model, it was found that the experimental electromagnetic transition rates are in better agreement with a collective -rotational description.

  • 50.
    Li, Hongjie
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik. Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China.
    Doncel, Maria
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Patial, Maria
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Cederwall, Bo
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Bäck, Torbjörn
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Jakobsson, U.
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik. Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland.
    Auranen, K.
    Boenig, S.
    Drummond, M.
    Grahn, T.
    Greenlees, P.
    Herzan, A.
    Joss, D. T.
    Julin, R.
    Juutinen, S.
    Konki, J.
    Kroell, T.
    Leino, M.
    McPeake, C.
    O'Donnell, D.
    Page, R. D.
    Pakarinen, J.
    Partanen, J.
    Peura, P.
    Rahkila, P.
    Ruotsalainen, P.
    Sandzelius, M.
    Saren, J.
    Saygi, B.
    Scholey, C.
    Sorri, J.
    Stolze, S.
    Taylor, M. J.
    Thornthwaite, A.
    Uusitalo, J.
    Xiao, Z. G.
    First identification of rotational band structures in Re-166(75)912015Inngår i: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 92, nr 1, artikkel-id 014310Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Excited states in the odd-odd, highly neutron-deficient nucleus Re-166 have been investigated via the Mo-92(Kr-78, 3p1n)Re-166 reaction. Prompt gamma rays were detected by the JUROGAM II. gamma-ray spectrometer, and the recoiling fusion-evaporation products were separated by the recoil ion transport unit (RITU) gas-filled recoil separator and implanted into the Gamma Recoil Electron Alpha Tagging spectrometer located at the RITU focal plane. The tagging and coincidence techniques were applied to identify the gamma-ray transitions in Re-166, revealing two collective, strongly coupled rotational structures, for the first time. The more strongly populated band structure is assigned to the pi h(11/2)[514]9/2(-) circle times vi(13/2)[660]1/2(+) Nilsson configuration, while the weaker structure is assigned to be built on a two-quasiparticle state of mixed pi h(11/2)[514]9/2(-) circle times v[h(9/2)f(7/2)]3/2(-) character. The configuration assignments are based on the electromagnetic characteristics and rotational properties, in comparison with predictions from total Routhian surface and particle-rotor model calculations.

12 1 - 50 of 79
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