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  • 1. Akkoyun, S.
    et al.
    Algora, A.
    Alikhani, B.
    Ameil, F.
    de Angelis, G.
    Arnold, L.
    Astier, A.
    Atac Nyberg, Ayse
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Aubert, Y.
    Aufranc, C.
    Austin, A.
    Aydin, S.
    Azaiez, F.
    Badoer, S.
    Balabanski, D. L.
    Barrientos, D.
    Baulieu, G.
    Baumann, R.
    Bazzacco, D.
    Beck, F. A.
    Beck, T.
    Bednarczyk, P.
    Bellato, M.
    Bentley, M. A.
    Benzoni, G.
    Berthier, R.
    Berti, L.
    Beunard, R.
    Lo Bianco, G.
    Birkenbach, B.
    Bizzeti, P. G.
    Bizzeti-Sona, A. M.
    Le Blanc, F.
    Blasco, J. M.
    Blasi, N.
    Bloor, D.
    Boiano, C.
    Borsato, M.
    Bortolato, D.
    Boston, A. J.
    Boston, H. C.
    Bourgault, P.
    Boutachkov, P.
    Bouty, A.
    Bracco, A.
    Brambilla, S.
    Brawn, I. P.
    Brondi, A.
    Broussard, S.
    Bruyneel, B.
    Bucurescu, D.
    Burrows, I.
    Buerger, A.
    Cabaret, S.
    Cahan, B.
    Calore, E.
    Camera, F.
    Capsoni, A.
    Carrio, F.
    Casati, G.
    Castoldi, M.
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Cercus, J. -L
    Chambert, V.
    El Chambit, M.
    Chapman, R.
    Charles, L.
    Chavas, J.
    Clement, E.
    Cocconi, P.
    Coelli, S.
    Coleman-Smith, P. J.
    Colombo, A.
    Colosimo, S.
    Commeaux, C.
    Conventi, D.
    Cooper, R. J.
    Corsi, A.
    Cortesi, A.
    Costa, L.
    Crespi, F. C. L.
    Cresswell, J. R.
    Cullen, D. M.
    Curien, D.
    Czermak, A.
    Delbourg, D.
    Depalo, R.
    Descombes, T.
    Desesquelles, P.
    Detistov, P.
    Diarra, C.
    Didierjean, F.
    Dimmock, M. R.
    Doan, Q. T.
    Domingo-Pardo, C.
    Doncel, M.
    Dorangeville, F.
    Dosme, N.
    Drouen, Y.
    Duchene, G.
    Dulny, B.
    Eberth, J.
    Edelbruck, P.
    Egea, J.
    Engert, T.
    Erduran, M. N.
    Erturk, S.
    Fanin, C.
    Fantinel, S.
    Farnea, E.
    Faul, T.
    Filliger, M.
    Filmer, F.
    Finck, Ch.
    de France, G.
    Gadea, A.
    Gast, W.
    Geraci, A.
    Gerl, J.
    Gernhaeuser, R.
    Giannatiempo, A.
    Giaz, A.
    Gibelin, L.
    Givechev, A.
    Goel, N.
    Gonzalez, V.
    Gottardo, A.
    Grave, X.
    Grebosz, J.
    Griffiths, R.
    Grint, A. N.
    Gros, P.
    Guevara, L.
    Gulmini, M.
    Goergen, A.
    Ha, H. T. M.
    Habermann, T.
    Harkness, L. J.
    Harroch, H.
    Hauschild, K.
    He, C.
    Hernandez-Prieto, A.
    Hervieu, B.
    Hess, H.
    Hueyuek, T.
    Ince, E.
    Isocrate, R.
    Jaworski, G.
    Johnson, Arne
    Jolie, J.
    Jones, P.
    Jonson, B.
    Joshi, P.
    Judson, D. S.
    Jungclaus, A.
    Kaci, M.
    Karkour, N.
    Karolak, M.
    Kaskas, A.
    Kebbiri, M.
    Kempley, R. S.
    Khaplanov, Anton
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Klupp, S.
    Kogimtzis, M.
    Kojouharov, I.
    Korichi, A.
    Korten, W.
    Kroell, Th.
    Kruecken, R.
    Kurz, N.
    Ky, B. Y.
    Labiche, M.
    Lafay, X.
    Lavergne, L.
    Lazarus, I. H.
    Leboutelier, S.
    Lefebvre, F.
    Legay, E.
    Legeard, L.
    Lelli, F.
    Lenzi, S. M.
    Leoni, S.
    Lermitage, A.
    Lersch, D.
    Leske, J.
    Letts, S. C.
    Lhenoret, S.
    Lieder, R. M.
    Linget, D.
    Ljungvall, J.
    Lopez-Martens, A.
    Lotode, A.
    Lunardi, S.
    Maj, A.
    van der Marel, J.
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Mariette, Y.
    Marginean, N.
    Marginean, R.
    Maron, G.
    Mather, A. R.
    Meczynski, W.
    Mendez, V.
    Medina, P.
    Melon, B.
    Menegazzo, R.
    Mengoni, D.
    Merchan, E.
    Mihailescu, L.
    Michelagnoli, C.
    Mierzejewski, J.
    Milechina, Larissa
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Million, B.
    Mitev, K.
    Molini, P.
    Montanari, D.
    Moon, S.
    Morbiducci, F.
    Moro, R.
    Morrall, P. S.
    Moeller, O.
    Nannini, A.
    Napoli, D. R.
    Nelson, L.
    Nespolo, M.
    Ngo, V. L.
    Nicoletto, M.
    Nicolini, R.
    Le Noa, Y.
    Nolan, P. J.
    Norman, M.
    Nyberg, J.
    Obertelli, A.
    Olariu, A.
    Orlandi, R.
    Oxley, D. C.
    Ozben, C.
    Ozille, M.
    Oziol, C.
    Pachoud, E.
    Palacz, M.
    Palin, J.
    Pancin, J.
    Parisel, C.
    Pariset, P.
    Pascovici, G.
    Peghin, R.
    Pellegri, L.
    Perego, A.
    Perrier, S.
    Petcu, M.
    Petkov, P.
    Petrache, C.
    Pierre, E.
    Pietralla, N.
    Pietri, S.
    Pignanelli, M.
    Piqueras, I.
    Podolyak, Z.
    Le Pouhalec, P.
    Pouthas, J.
    Pugnere, D.
    Pucknell, V. F. E.
    Pullia, A.
    Quintana, B.
    Raine, R.
    Rainovski, G.
    Ramina, L.
    Rampazzo, G.
    La Rana, G.
    Rebeschini, M.
    Recchia, F.
    Redon, N.
    Reese, M.
    Reiter, P.
    Regan, P. H.
    Riboldi, S.
    Richer, M.
    Rigato, M.
    Rigby, S.
    Ripamonti, G.
    Robinson, A. P.
    Robin, J.
    Roccaz, J.
    Ropert, J. -A
    Rosse, B.
    Rossi Alvarez, C.
    Rosso, D.
    Rubio, B.
    Rudolph, D.
    Saillant, F.
    Sahin, E.
    Salomon, F.
    Salsac, M. -D
    Salt, J.
    Salvato, G.
    Sampson, J.
    Sanchis, E.
    Santos, C.
    Schaffner, H.
    Schlarb, M.
    Scraggs, D. P.
    Seddon, D.
    Senyigit, M.
    Sigward, M. -H
    Simpson, G.
    Simpson, J.
    Slee, M.
    Smith, J. F.
    Sona, P.
    Sowicki, B.
    Spolaore, P.
    Stahl, C.
    Stanios, T.
    Stefanova, E.
    Stezowski, O.
    Strachan, J.
    Suliman, G.
    Soderstrom, P. -A
    Tain, J. L.
    Tanguy, S.
    Tashenov, Stanislav
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Theisen, Ch.
    Thornhill, J.
    Tomasi, F.
    Toniolo, N.
    Touzery, R.
    Travers, B.
    Triossi, A.
    Tripon, M.
    Tun-Lanoe, K. M. M.
    Turcato, M.
    Unsworth, C.
    Ur, C. A.
    Valiente-Dobon, J. J.
    Vandone, V.
    Vardaci, E.
    Venturelli, R.
    Veronese, F.
    Veyssiere, Ch.
    Viscione, E.
    Wadsworth, R.
    Walker, P. M.
    Warr, N.
    Weber, C.
    Weisshaar, D.
    Wells, D.
    Wieland, O.
    Wiens, A.
    Wittwer, G.
    Wollersheim, H. J.
    Zocca, F.
    Zamfir, N. V.
    Zieblinski, M.
    Zucchiatti, A.
    AGATA-Advanced GAmma Tracking Array2012In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 668, p. 26-58Article in journal (Refereed)
    Abstract [en]

    The Advanced GAmma Tracking Array (AGATA) is a European project to develop and operate the next generation gamma-ray spectrometer. AGATA is based on the technique of gamma-ray energy tracking in electrically segmented high-purity germanium crystals. This technique requires the accurate determination of the energy, time and position of every interaction as a gamma ray deposits its energy within the detector volume. Reconstruction of the full interaction path results in a detector with very high efficiency and excellent spectral response. The realisation of gamma-ray tracking and AGATA is a result of many technical advances. These include the development of encapsulated highly segmented germanium detectors assembled in a triple cluster detector cryostat, an electronics system with fast digital sampling and a data acquisition system to process the data at a high rate. The full characterisation of the crystals was measured and compared with detector-response simulations. This enabled pulse-shape analysis algorithms, to extract energy, time and position, to be employed. In addition, tracking algorithms for event reconstruction were developed. The first phase of AGATA is now complete and operational in its first physics campaign. In the future AGATA will be moved between laboratories in Europe and operated in a series of campaigns to take advantage of the different beams and facilities available to maximise its science output. The paper reviews all the achievements made in the AGATA project including all the necessary infrastructure to operate and support the spectrometer.

  • 2.
    Aktas, Özge
    et al.
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Qi, Chong
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Nyberg, Ayse
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Doornenbal, P.
    RIKEN Nishina Center, Wako, Saitama 351-0198, Japan.
    Ogata, K.
    Yoshida, K.
    Corsi, Anna
    IRFU, CEA, Universit\'{e} Paris-Saclay, F-91191 Gif-sur-Yvette, France.
    Liu, Hongna
    KTH, School of Engineering Sciences (SCI), Physics.
    Authelet, G.
    IRFU, CEA, Universit\'{e} Paris-Saclay, F-91191 Gif-sur-Yvette, France.
    Baba, H.
    RIKEN Nishina Center, Wako, Saitama 351-0198, Japan.
    Calvet, D.
    IRFU, CEA, Universit\'{e} Paris-Saclay, F-91191 Gif-sur-Yvette, France.
    Ch\^{a}teau, F.
    IRFU, CEA, Universit\'{e} Paris-Saclay, F-91191 Gif-sur-Yvette, France.
    Delbart, A.
    IRFU, CEA, Universit\'{e} Paris-Saclay, F-91191 Gif-sur-Yvette, France.
    Gheller, J-M.
    IRFU, CEA, Universit\'{e} Paris-Saclay, F-91191 Gif-sur-Yvette, France.
    Giganon, A.
    IRFU, CEA, Universit\'{e} Paris-Saclay, F-91191 Gif-sur-Yvette, France.
    Gillibert, A.
    IRFU, CEA, Universit\'{e} Paris-Saclay, F-91191 Gif-sur-Yvette, France.
    Lapoux, V.
    IRFU, CEA, Universit\'{e} Paris-Saclay, F-91191 Gif-sur-Yvette, France.
    Motobayashi, T.
    RIKEN Nishina Center, Wako, Saitama 351-0198, Japan.
    Nikura, M.
    Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
    Paul, N.
    RFU, CEA, Universit\'{e} Paris-Saclay, F-91191 Gif-sur-Yvette, France.
    -Y Rouss\'{e}, J.
    IRFU, CEA, Universit\'{e} Paris-Saclay, F-91191 Gif-sur-Yvette, France.
    Sakurai, H.
    RIKEN Nishina Center, Wako, Saitama 351-0198, Japan.
    Santamaria, C.
    IRFU, CEA, Universit\'{e} Paris-Saclay, F-91191 Gif-sur-Yvette, France.
    Steppenbeck, D.
    RIKEN Nishina Center, Wako, Saitama 351-0198, Japan.
    Taniuchi, R.
    Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
    Uesaka, T.
    RIKEN Nishina Center, Wako, Saitama 351-0198, Japan.
    Ando, T.
    Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
    Arici, T.
    GSI Helmholtzzentrum f\"{u}r Schwerionenforschung GmbH, 64291 Darmstadt, Germany.
    Blazhev, A.
    Institut f\"{u}r Kernphysik, Universit\"{a}t zu K\"{o}ln, 50923 K\"{o}ln, Germany.
    Browne, F.
    School of Computing Engineering and Mathematics, University of Brighton, Brighton BN2 4GJ, United Kingdom.
    Bruce, A.M.
    School of Computing Engineering and Mathematics, University of Brighton, Brighton BN2 4GJ, United Kingdom.
    Carroll, R.
    Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom.
    Chen, S.
    School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University,Beijing 100871, China.
    Chung, L.X.
    Institute for Nuclear Science and Technology, VINATOM, 179 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam.
    Cort\'{e}s, M.L.
    Institut f\"{u}r Kernphysik, Technische Universit\"{a}t Darmstadt, 64289 Darmstadt, Germany.
    Dewald, M.
    Institut f\"{u}r Kernphysik, Universit\"{a}t zu K\"{o}ln, 50923 K\"{o}ln, Germany.
    Ding, B.
    Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
    Franchoo, S.
    Institut de Physique Nucl\'{e}aire, CNRS-IN2P3, Univ. Paris—Sud, Universit\'{e} Paris-Saclay, 91406 Orsay Cedex, France.
    G\'{o}rska, M.
    GSI Helmholtzzentrum f\"{u}r Schwerionenforschung GmbH, 64291 Darmstadt, Germany.
    Gottardo, A.
    Institut de Physique Nucl\'{e}aire, CNRS-IN2P3, Univ. Paris—Sud, Universit\'{e} Paris-Saclay, 91406 Orsay Cedex, France.
    Jungclaus, A.
    Instituto de Estructura de la Materia, CSIC, 28006 Madrid, Spain.
    Lee, J.
    Lettmann, M.
    Institut f\"{u}r Kernphysik, Technische Universit\"{a}t Darmstadt, 64289 Darmstadt, Germany.
    Linh, B.D.
    Institute for Nuclear Science and Technology, VINATOM, 179 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam.
    Liu, J.
    Department of Physics, The University of Hong Kong, Pokfulam, Hong Kong.
    Liu, Z.
    Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
    Lizarazo, C.
    Institut f\"{u}r Kernphysik, Technische Universit\"{a}t Darmstadt, 64289 Darmstadt, Germany.
    Momiyama, S.
    Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
    Moschner, K.
    Institut f\"{u}r Kernphysik, Universit\"{a}t zu K\"{o}ln, 50923 K\"{o}ln, Germany.
    Nagamine, S.
    Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
    Nakatsuka, N.
    Department of Physics, Faculty of Science, Kyoto University, Kyoto 606-8502, Japan.
    Nita, C.R.
    Horia Hulubei National Institute of Physics and Nuclear Engineering (IFIN-HH), R-077125 Bucharest, Romania.
    Nobs, C.
    School of Computing Engineering and Mathematics, University of Brighton, Brighton BN2 4GJ, United Kingdom.
    Olivier, L.
    Institut de Physique Nucl\'{e}aire, CNRS-IN2P3, Univ. Paris—Sud, Universit\'{e} Paris-Saclay, 91406 Orsay Cedex, France.
    Orlandi, R.
    Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki, 319-1195, Japan.
    Patel, Z.
    Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom.
    Podoly\'{a}k, Zs.
    Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom.
    Rudigier, M.
    Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom.
    Saito, T. Y.
    RIKEN Nishina Center, Wako, Saitama 351-0198, Japan.
    Shand, C.
    Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom.
    S\"{o}derstr\"{o}m, P.-A.
    RIKEN Nishina Center, Wako, Saitama 351-0198, Japan.
    Stefan, I.
    nstitut de Physique Nucl\'{e}aire, CNRS-IN2P3, Univ. Paris—Sud, Universit\'{e} Paris-Saclay, 91406 Orsay Cedex, France.
    Vaquero, V.
    Instituto de Estructura de la Materia, CSIC, 28006 Madrid, Spain.
    Werner, V.
    Institut f\"{u}r Kernphysik, Technische Universit\"{a}t Darmstadt, 64289 Darmstadt, Germany.
    Wimmer, K.
    Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
    Xu, Z.
    Department of Physics, The University of Hong Kong, Pokfulam, Hong Kong.
    Single-particle structures in 85,87GeIn: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490XArticle in journal (Refereed)
    Abstract [en]

    Gamma-ray transitions have been identified for the first time in the extremely neutron-rich (N =Z + 25) nucleus 87 Ge following nucleon knockout reactions studied at the RIBF, RIKEN, Japan.New γ-ray transitions from excited states in 85 Ge were also observed and placed in a tentative levelscheme. The exclusive parallel momentum distribution was measured for the 1/2 + state for theneutron knockout reaction leading to 85 Ge which is compared with calculated distorted wave impulseapproximation (DWIA) distributions. The 85,87 Ge results are compared with large-scale shell-modelcalculations and potential energy surface calculations based on the total Routhian surface formalism.

  • 3.
    Aktas, Özge
    et al.
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Wyss, Ramon
    KTH, School of Engineering Sciences (SCI).
    Nyberg, Ayse
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Doornenbal, P.
    RIKEN Nishina Center, Wako, Saitama 351-0198, Japan.
    Obertelli, A.
    IRFU, CEA, Universit\'{e} Paris-Saclay, F-91191 Gif-sur-Yvette, France.
    Corsi, Anna
    IRFU, CEA, Universit\'{e} Paris-Saclay, F-91191 Gif-sur-Yvette, France.
    Liu, Hongna
    KTH, School of Engineering Sciences (SCI), Physics.
    Authelet, G.
    IRFU, CEA, Universit\'{e} Paris-Saclay, F-91191 Gif-sur-Yvette, France.
    Baba, H.
    RIKEN Nishina Center, Wako, Saitama 351-0198, Japan.
    Calvet, D.
    IRFU, CEA, Universit\'{e} Paris-Saclay, F-91191 Gif-sur-Yvette, France.
    Ch\^{a}teau, F.
    IRFU, CEA, Universit\'{e} Paris-Saclay, F-91191 Gif-sur-Yvette, France.
    Delbart, A.
    IRFU, CEA, Universit\'{e} Paris-Saclay, F-91191 Gif-sur-Yvette, France.
    Gheller, J-M.
    IRFU, CEA, Universit\'{e} Paris-Saclay, F-91191 Gif-sur-Yvette, France.
    Giganon, A.
    IRFU, CEA, Universit\'{e} Paris-Saclay, F-91191 Gif-sur-Yvette, France.
    Gillibert, A.
    IRFU, CEA, Universit\'{e} Paris-Saclay, F-91191 Gif-sur-Yvette, France.
    Lapoux, V.
    IRFU, CEA, Universit\'{e} Paris-Saclay, F-91191 Gif-sur-Yvette, France.
    Motobayashi, T.
    RIKEN Nishina Center, Wako, Saitama 351-0198, Japan.
    Nikura, M.
    Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
    Paul, N.
    RFU, CEA, Universit\'{e} Paris-Saclay, F-91191 Gif-sur-Yvette, France.
    Rouss\'{e}, J.-Y
    IRFU, CEA, Universit\'{e} Paris-Saclay, F-91191 Gif-sur-Yvette, France.
    Sakurai, H.
    RIKEN Nishina Center, Wako, Saitama 351-0198, Japan.
    Santamaria, C.
    IRFU, CEA, Universit\'{e} Paris-Saclay, F-91191 Gif-sur-Yvette, France.
    Steppenbeck, D.
    RIKEN Nishina Center, Wako, Saitama 351-0198, Japan.
    Taniuchi, R.
    Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
    Uesaka, T.
    RIKEN Nishina Center, Wako, Saitama 351-0198, Japan.
    Ando, T.
    Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
    Arici, T.
    GSI Helmholtzzentrum f\"{u}r Schwerionenforschung GmbH, 64291 Darmstadt, Germany.
    Blazhev, A.
    Institut f\"{u}r Kernphysik, Universit\"{a}t zu K\"{o}ln, 50923 K\"{o}ln, Germany.
    Browne, F.
    School of Computing Engineering and Mathematics, University of Brighton, Brighton BN2 4GJ, United Kingdom.
    Bruce, A.M.
    School of Computing Engineering and Mathematics, University of Brighton, Brighton BN2 4GJ, United Kingdom.
    Carroll, R.
    Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom.
    Chen, S.
    School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University,Beijing 100871, China.
    Chung, L.X.
    Institute for Nuclear Science and Technology, VINATOM, 179 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam.
    Cort\'{e}s, M.L.
    Institut f\"{u}r Kernphysik, Technische Universit\"{a}t Darmstadt, 64289 Darmstadt, Germany.
    Dewald, M.
    Institut f\"{u}r Kernphysik, Universit\"{a}t zu K\"{o}ln, 50923 K\"{o}ln, Germany.
    Ding, B.
    Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
    Flavigny, F.
    Institut de Physique Nucl\'{e}aire, CNRS-IN2P3, Univ. Paris—Sud, Universit\'{e} Paris-Saclay, 91406 Orsay Cedex, France.
    Franchoo, S.
    Institut de Physique Nucl\'{e}aire, CNRS-IN2P3, Univ. Paris—Sud, Universit\'{e} Paris-Saclay, 91406 Orsay Cedex, France.
    G\'{o}rska, M.
    GSI Helmholtzzentrum f\"{u}r Schwerionenforschung GmbH, 64291 Darmstadt, Germany.
    Gottardo, A.
    Institut de Physique Nucl\'{e}aire, CNRS-IN2P3, Univ. Paris—Sud, Universit\'{e} Paris-Saclay, 91406 Orsay Cedex, France.
    Jungclaus, A.
    Instituto de Estructura de la Materia, CSIC, 28006 Madrid, Spain.
    Lee, J.
    Lettmann, M.
    Institut f\"{u}r Kernphysik, Technische Universit\"{a}t Darmstadt, 64289 Darmstadt, Germany.
    Linh, B.D.
    Institute for Nuclear Science and Technology, VINATOM, 179 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam.
    Liu, J.
    Department of Physics, The University of Hong Kong, Pokfulam, Hong Kong.
    Liu, Z.
    Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
    Lizarazo, C.
    Institut f\"{u}r Kernphysik, Technische Universit\"{a}t Darmstadt, 64289 Darmstadt, Germany.
    Momiyama, S.
    Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
    Moschner, K.
    Institut f\"{u}r Kernphysik, Universit\"{a}t zu K\"{o}ln, 50923 K\"{o}ln, Germany.
    Nagamine, S.
    Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
    Nakatsuka, N.
    Department of Physics, Faculty of Science, Kyoto University, Kyoto 606-8502, Japan.
    Nita, C.R.
    Horia Hulubei National Institute of Physics and Nuclear Engineering (IFIN-HH), R-077125 Bucharest, Romania.
    Nobs, C.
    School of Computing Engineering and Mathematics, University of Brighton, Brighton BN2 4GJ, United Kingdom.
    Olivier, L.
    Institut de Physique Nucl\'{e}aire, CNRS-IN2P3, Univ. Paris—Sud, Universit\'{e} Paris-Saclay, 91406 Orsay Cedex, France.
    Orlandi, R.
    Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki, 319-1195, Japan.
    Patel, Z.
    Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom.
    Podoly\'{a}k, Zs.
    Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom.
    Rudigier, M.
    Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom.
    Saito, T. Y.
    RIKEN Nishina Center, Wako, Saitama 351-0198, Japan.
    Shand, C.
    Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom.
    S\"{o}derstr\"{o}m, P.-A.
    RIKEN Nishina Center, Wako, Saitama 351-0198, Japan.
    Stefan, I.
    nstitut de Physique Nucl\'{e}aire, CNRS-IN2P3, Univ. Paris—Sud, Universit\'{e} Paris-Saclay, 91406 Orsay Cedex, France.
    Vaquero, V.
    Instituto de Estructura de la Materia, CSIC, 28006 Madrid, Spain.
    Werner, V.
    Institut f\"{u}r Kernphysik, Technische Universit\"{a}t Darmstadt, 64289 Darmstadt, Germany.
    Wimmer, K.
    Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
    Xu, Z.
    Department of Physics, The University of Hong Kong, Pokfulam, Hong Kong.
    First observation of γ-ray transitions in 111MoIn: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490XArticle in journal (Refereed)
    Abstract [en]

    Excited states in the extremely neutron-rich nuclei 109Mo and 111Mo have been studied following nucleon knock-out reactions. Seven $\gamma$-ray transitions, some of them in prompt mutual coincidence, have been identified for the first time in 11Mo using the DALI2 and MINOS detector systems at the BigRIPS and ZeroDegree electromagnetic fragments separator at the RIBF, RIKEN, Japan. Total Routhian surface (TRS) and Particle- Plus Rotor calculations have been performed to investigate the predicted shape coexistence and its effect on the structure of nuclei in this region of the nuclear chart. Following the results of the calculations, theoretical level schemes are proposed for positive and negative parity states and compared with the experimental findings.

  • 4. Al-Khatib, A.
    et al.
    Singh, A. K.
    Hubel, H.
    Bringel, P.
    Burger, A.
    Neusser, A.
    Schonwasser, G.
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Lagergren, Karin
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Gorgen, A.
    et al.,
    High-spin states in Ba-1242005In: Acta Physica Polonica B, ISSN 0587-4254, E-ISSN 1509-5770, Vol. 36, no 4, p. 1029-1032Article in journal (Refereed)
    Abstract [en]

    High-spin states in Ba-124 were populated using the Ni-64 (Ni-64,4n) Ba-124 reaction at beam energies of 255 and 261 MeV. Gamma-ray coincidences were measured using the EUROBALL detector array. The charged-particle detector array DIAMANT provided channel selection. The previously known rotational bands are extended to higher spins. Five new hands are observed, one of them extends up to the spin 40h region.

  • 5. Al-Khatib, A.
    et al.
    Singh, A. K.
    Hubel, H.
    Bringel, P.
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Redon, N.
    et al,
    Competition between collective and noncollective excitation modes at high spin in Ba-1242006In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 74, no 1Article in journal (Refereed)
    Abstract [en]

    High-spin states in Ba-124 were investigated in two experiments using the Ni-64(Ni-64, 4n)Ba-124 reaction at three different beam energies. In-beam gamma-ray coincidences were measured with the Euroball and Gammasphere detector arrays. In the experiment with Euroball, the CsI detector array Diamant was employed to discriminate against charged-particle channels. Six new rotational bands were observed in Ba-124, and previously known bands were extended to higher spins. One of the bands shows a transition from collective to noncollective behavior at high spins. Configuration assignments are suggested on the basis of comparison with cranked shell model and cranked Nilsson-Strutinsky calculations.

  • 6.
    Andgren, Karin
    et al.
    KTH, School of Engineering Sciences (SCI), Physics.
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics.
    Bäck, Torbjörn
    KTH, School of Engineering Sciences (SCI), Physics.
    Hadinia, Baharak
    KTH, School of Engineering Sciences (SCI), Physics.
    Johnson, Arne
    KTH, School of Engineering Sciences (SCI), Physics.
    Khaplanov, Anton
    KTH, School of Engineering Sciences (SCI), Physics.
    Sandzelius, Mikael
    KTH, School of Engineering Sciences (SCI), Physics.
    Wyss, Ramon
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    gamma-ray spectroscopy of At-1972008In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 78, no 4, p. 044328-1-044328-8Article in journal (Refereed)
    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.

  • 7.
    Andgren, Karin
    et al.
    KTH, School of Engineering Sciences (SCI), Physics.
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics.
    Hadinia, Baharak
    KTH, School of Engineering Sciences (SCI), Physics.
    Johnson, Arne
    KTH, School of Engineering Sciences (SCI), Physics.
    Khaplanov, Anton
    KTH, School of Engineering Sciences (SCI), Physics.
    Sandzelius, Mikael
    KTH, School of Engineering Sciences (SCI), Physics.
    Wyss, Ramon
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    et al.,
    Excited states in the neutron-deficient nuclei Rn-197,Rn-199,Rn-2012008In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 77, no 5, p. 054303-1-054303-7Article in journal (Refereed)
    Abstract [en]

    Excited states of the extremely neutron-deficient radon isotopes with N = 111, 113, 115 have been studied for the first time in a series of in-beam experiments performed at the Accelerator Laboratory of the University of Jyvaskyla. The reactions used were: Sn-118(Kr-82, 3n)Rn-197, Sn-120(Kr-82, 3n)Rn-199, Sm-150(Cr-52, 3n)Rn-199, and Sn-122(Kr-82, 3n)Rn-201. The gamma rays emitted from excited states in the different isotopes were identified using the recoil-alpha-decay tagging technique. The estimated cross section for the production of Rn-197(m) was 7(3) nb, which is the lowest cross section reported so far for an in-beam study. The energies of the (17/2(+)) levels built on the isomeric (13/2(+)) states in Rn-197,Rn-199,Rn-201 indicate a transition from an anharmonic vibrational structure toward a rotational structure at low spins for these nuclei. However, the transition is not as sharp as predicted by theory.

  • 8.
    Andgren, Karin
    et al.
    KTH, School of Engineering Sciences (SCI), Physics.
    Ganioglu, Ela
    KTH, School of Engineering Sciences (SCI), Physics.
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics.
    Wyss, Ramon
    KTH, School of Engineering Sciences (SCI), Physics.
    Hadinia, Baharak
    KTH, School of Engineering Sciences (SCI), Physics.
    Johnson, Arne
    KTH, School of Engineering Sciences (SCI), Physics.
    Khaplanov, Anton
    KTH, School of Engineering Sciences (SCI), Physics.
    Sandzelius, Mikael
    KTH, School of Engineering Sciences (SCI), Physics.
    et al.,
    Low-spin collective behavior in the transitional nuclei Mo-86,Mo-882007In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 76, no 1, p. 014307-1-014307-9Article in journal (Refereed)
    Abstract [en]

    Low-spin structures in Mo-86,Mo-88 were populated using the Ni-58(Ar-36, x alpha yp) heavy-ion fusion-evaporation reaction at a beam energy of 111 MeV. Charged particles and gamma rays were emitted in the reactions and detected by the DIAMANT CsI ball and the EXOGAM Ge array, respectively. In addition to the previously reported low-to-medium spin states in these nuclei, new low-spin structures were observed. Angular correlation and linear polarization measurements were performed in order to unambiguously determine the spins and parities of intensely populated states in Mo-88. Quasiparticle Random Phase Approximation (QRPA) calculations were performed for the first and second excited 2(+) states in Mo-86 and Mo-88. The results are in qualitative agreement with the experimental results, supporting a collective interpretation of the low-spin states for these transitional nuclei.

  • 9.
    Andgren, Karin
    et al.
    KTH, School of Engineering Sciences (SCI), Physics.
    Podolyak, Zsolt
    Univ Surrey, Dept Phys.
    Dewald, Alfred
    Univ Cologne, Inst Kernphys.
    Xu, Fu-Rong
    Peking Univ, Sch Phys.
    Algora, Alejandro
    IFIC, Valencia.
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics.
    et al.,
    Lifetime measurements of normal deformed states in Lu-165(71)2005In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 71, no 1, p. 121-127Article in journal (Refereed)
    Abstract [en]

    Picosecond lifetimes of medium spin states in Lu-165 were measured for the first time. The reaction used to populate the nucleus of interest was La-139(Si-30,4n)Lu-165 at a beam energy of 135 MeV. The beam was provided by the XTU-tandem accelerator of Laboratori Nazionali di Legnaro, Italy. By using the differential decay curve method, lifetimes of 19 states in four different rotational bands were obtained. Therefrom the B(E2) values and the transitional quadrupole moments were deduced. The obtained Q(t) for the different bands are compared with total Routhian surface (TRS) calculations and particle-rotor-model calculations. The TRS calculations predict different axial symmetric shapes for the bands built on the 9/2(-)[514], 9/2(+)[404], and 1/2(-)[541] configurations, with a gamma softness for the 9/2(-)[514] configuration. This band has also been studied using the particle-rotor model, the results of which, however, are consistent with a triaxial shape with a gamma value of -15(p).

  • 10. Asztalos, S J
    et al.
    Lee, I Y
    Vetter, K
    Cederwall, B
    Clark, R M
    Deleplanque, M A
    Diamond, R M
    Fallon, P
    Jing, K
    Phair, L
    Macchiavelli, A O
    Rasmussen, J O
    Stephens, F S
    Wozniak, G J
    Becker, J A
    Bernstein, L A
    McNabb, D P
    Hua, P F
    Sarantites, D G
    Saladin, J X
    Yu, C H
    Cizewski, J A
    Donangelo, R
    Spin yields of neutron-rich nuclei from deep inelastic reactions1999In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 60, no 4, article id 044307Article in journal (Refereed)
    Abstract [en]

    The potential for using deep inelastic reactions to populate high-spin states in neutron-rich nuclei is studied in a series of experiments using GAMMASPHERE for gamma-ray detection and a silicon strip detector for measuring the angles of projectilelike and targetlike fragments. In three experiments 61 new transitions up to a maximum spin of 22 (h) over bar in 12 neutron-rich rare-earth nuclei were found. We observe that gamma-ray yields as a function of spin are flatter for all neutron transfer products than for inelastic excitation of either the projectile or target nucleus. Calculations are presented which indicate that this difference cannot be accounted for by quasielastic processes, but more likely are the result of larger energy loss processes, such as deep inelastic reactions. [S0556-2813(99)06009-4].

  • 11. Asztalos, S. J.
    et al.
    Lee, I. Y.
    Vetter, K.
    Cederwall, Bo
    KTH, Superseded Departments (pre-2005), Physics.
    Clark, R. M.
    Deleplanque, M. A.
    Diamond, R. M.
    Fallon, P.
    Jing, K.
    Phair, L.
    Macchiavelli, A. O.
    Stephens, F. S.
    Wozniak, G. J.
    Bernstein, L. A.
    McNabb, D. P.
    Hua, P. F.
    Sarantites, D. G.
    Saladin, J. X.
    Yu, C. H.
    Cizewski, J. A.
    Isotopic yields of neutron-rich nuclei from deep-inelastic reactions2000In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 6101, no 1Article in journal (Refereed)
    Abstract [en]

    We follow up on our earlier work involving a light projectile (Ca-48) to populate high spin states in neutron-rich nuclei with results from experiments involving a heavier projectile (Sm-154) fur the purposes of studying isotopic yields. These yields, which in some cases were mensurable down to a level of 0.1 of the total reaction cross section, are presented from three separate reactions. A trend in the isotopic yields towards N/Z equilibration is observed in one experiment having a large disparity in N/Z ratios between the projectile and target. In the two other reactions, where the N/Z driving force is less pronounced, the yields are instead clustered around the projectile and target nuclei. We present correlated projectilelike and targetlike fragment isotopic yields derived from gamma-gamma coincidences, a technique that enables one to partition the yield of an isotope according to the amount of neutron evaporation. Using this method we find that for the zero-neutron evaporation channel transfer occurs predominantly into the light fragment, consistent with the nature of the deep-inelastic mechanism. We further find that multiple-neutron evaporation contributes substantially to the yields of the isotopes.

  • 12. ASZTALOS, SJ
    et al.
    FALLON, P
    CLARK, RM
    BECKER, JA
    BERNSTEIN, LA
    Cederwall, Bo
    DELEPLANQUE, MA
    DIAMOND, RM
    FARRIS, LP
    HENRY, EA
    KELLY, WH
    LEE, IY
    MACCHIAVELLI, AO
    STEPHENS, FS
    CONFIRMATION OF THE SUPERDEFORMED BAND IN PB-1921995In: Zeitschrift für Physik A Hadrons and Nuclei, ISSN 0939-7922, E-ISSN 1431-5831, Vol. 352, no 3, p. 239-240Article in journal (Refereed)
    Abstract [en]

    High-spin states in Pb-192 were populated via the reaction Yb-173(Mg-24,5n) at a beam energy of 140 MeV, and the resulting gamma-rays were deteced using GAMMA-SPHERE. A previously observed superdeformed band in Pb-192 has been confirmed.

  • 13. 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-1431999In: European Physical Journal A, ISSN 1434-6001, E-ISSN 1434-601X, Vol. 6, no 2, p. 175-183Article in journal (Refereed)
    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.

  • 14. B Singh,
    et al.
    Bäck, Torbjörn
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Zmeskal, J.
    et al.,
    Technical design report for the (P)over-barANDA Barrel DIRC detector2019In: Journal of Physics G: Nuclear and Particle Physics, ISSN 0954-3899, E-ISSN 1361-6471, no 4Article in journal (Refereed)
    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.

  • 15. Baldsiefen, G
    et al.
    Stoyer, M A
    Cizewski, J A
    Mcnabb, D P
    Younes, W
    Becker, J A
    Bernstein, L A
    Brinkman, M J
    Farris, L P
    Henry, E A
    Hughes, J R
    Kuhnert, A
    Wang, T F
    Cederwall, Bo
    Clark, R M
    Deleplanque, M A
    Diamond, R M
    Fallon, P
    Lee, I Y
    Macchiavelli, A O
    Oliveira, J
    Stephens, F S
    Burde, J
    Vo, D T
    Frauendorf, S
    Shears bands in Pb-1931996In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 54, no 3, p. 1106-1116Article in journal (Refereed)
    Abstract [en]

    Four bands of enhanced dipole transitions, with weak crossovers, have been observed in Pb-195. Three of these bands are connected to the spherical levels. in addition, the spherical level scheme has been extended. The nuclear spectroscopy was done with the early implementation of GAMMASPHERE and HERA arrays of Get detectors. The nucleus Pb-193 was populated in the Yb-174(Mg-24,5n) reaction at beam energies of 129, 131, and 134 MeV. The experimental results are compared to tilted-axis cranking calculations. The systematical behavior of the dipole bands in the heavier odd-A Pb isotopes, Pb-195,Pb-197,Pb-199,Pb-201, is also discussed.

  • 16.
    Barday, R.
    et al.
    Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany..
    Tashenov, Stanislav
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics. Stockholm Univ, Dept Atom Phys, SE-10691 Stockholm, Sweden.
    Bäck, Torbjörn
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    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, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Poltoratska, Y.
    Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany..
    Schässburger, Kai-Uwe
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    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 APPLICATIONS2011In: POLARIZED SOURCES, TARGETS AND POLARIMETRY / [ed] Ciullo, G Contalbrigo, M Lenisa, P, WORLD SCIENTIFIC PUBL CO PTE LTD , 2011, p. 105-112Conference paper (Refereed)
    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.

  • 17. 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-1711999In: Nuclear Physics A, ISSN 0375-9474, E-ISSN 1873-1554, Vol. 646, no 4, p. 399-413Article in journal (Refereed)
    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.

  • 18. 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-1711999In: Nuclear Physics A, ISSN 0375-9474, E-ISSN 1873-1554, Vol. 657, no 2, p. 113-133Article in journal (Refereed)
    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.

  • 19. Barucca, G
    et al.
    Atac, A
    Bäck, Torbjörn
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Zmeskal, J.
    et al.,
    Feasibility studies for the measurement of time-like proton electromagnetic form factors from (p)over-barp -> mu(+)mu(-) at PANDA at FAIR2021In: European Physical Journal A, ISSN 1434-6001, E-ISSN 1434-601X, Vol. 57, no 1Article in journal (Refereed)
    Abstract [en]

    This paper reports on Monte Carlo simulation results for future measurements of the moduli of time-like proton electromagnetic form factors, vertical bar G(E)vertical bar and vertical bar G(M)vertical bar, using the (p) over barp -> mu(+)mu(-) reaction at PANDA (FAIR). The electromagnetic form factors are fundamental quantities parameterizing the electric and magnetic structure of hadrons. This work estimates the statistical and total accuracy with which the form factors can be measured at PANDA, using an analysis of simulated data within the PandaRoot software framework. The most crucial background channel is (p) over barp -> pi(+)pi(-), due to the very similar behavior of muons and pions in the detector. The suppression factors are evaluated for this and all other relevant background channels at different values of antiproton beam momentum. The signal/background separation is based on a multivariate analysis, using the Boosted Decision Trees method. An expected background subtraction is included in this study, based on realistic angular distributions of the background contribution. Systematic uncertainties are considered and the relative total uncertainties of the form factor measurements are presented.

  • 20.
    Barucca, G.
    et al.
    Univ Politecn Marche Ancona, Ancona, Italy..
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Ryan, Sinead M.
    Trinity Coll Dublin, Sch Math, Dublin 2, Ireland.;Trinity Coll Dublin, Hamilton Math Inst, Dublin 2, Ireland..
    PANDA Phase One2021In: European Physical Journal A, ISSN 1434-6001, E-ISSN 1434-601X, Vol. 57, no 6, article id 184Article in journal (Refereed)
    Abstract [en]

    The Facility for Antiproton and Ion Research (FAIR) in Darmstadt, Germany, provides unique possibilities for a new generation of hadron-, nuclear- and atomic physics experiments. The future antiProton ANnihilations at DArmstadt (PANDA or PANDA) experiment at FAIR will offer a broad physics programme, covering different aspects of the strong interaction. Understanding the latter in the non-perturbative regime remains one of the greatest challenges in contemporary physics. The antiproton-nucleon interaction studied with PANDA provides crucial tests in this area. Furthermore, the high-intensity, low-energy domain of PANDA allows for searches for physics beyond the Standard Model, e.g. through high precision symmetry tests. This paper takes into account a staged approach for the detector setup and for the delivered luminosity from the accelerator. The available detector setup at the time of the delivery of the first antiproton beams in the HESR storage ring is referred to as the Phase One setup. The physics programme that is achievable during Phase One is outlined in this paper.

  • 21. Barucca, G.
    et al.
    Davì, F.
    Lancioni, G.
    Mengucci, P.
    Montalto, L.
    Natali, P. P.
    Paone, N.
    Rinaldi, D.
    Scalise, L.
    Erni, W.
    Krusche, B.
    Steinacher, M.
    Walford, N.
    Cao, N.
    Liu, Z.
    Liu, C.
    Liu, B.
    Shen, X.
    Sun, S.
    Tao, J.
    Xiong, X. A.
    Zhao, G.
    Zhao, J.
    Albrecht, M.
    Alkakhi, W.
    Bökelmann, S.
    Feldbauer, F.
    Fink, M.
    Frech, J.
    Freudenreich, V.
    Fritsch, M.
    Hagdorn, R.
    Heinsius, F. H.
    Held, T.
    Holtmann, T.
    Keshk, I.
    Koch, H.
    Kopf, B.
    Kuhlmann, M.
    Kümmel, M.
    Küßner, M.
    Li, J.
    Mustafa, A.
    Pelizäus, M.
    Pitka, A.
    Reher, J.
    Reicherz, G.
    Richter, M.
    Schnier, C.
    Sohl, L.
    Steinke, M.
    Triffterer, T.
    Wenzel, C.
    Wiedner, U.
    Denizli, H.
    Er, N.
    Beck, R.
    Hammann, C.
    Hartmann, J.
    Ketzer, B.
    Müllers, J.
    Rossbach, M.
    Salisbury, B.
    Schmidt, C.
    Thoma, U.
    Urban, M.
    Bianconi, A.
    Bragadireanu, M.
    Pantea, D.
    Domagala, M.
    Filo, G.
    Lisowski, E.
    Lisowski, F.
    Michałek, M.
    Poznański, P.
    Płażek, J.
    Korcyl, K.
    Kozela, A.
    Lebiedowicz, P.
    Pysz, K.
    Schäfer, W.
    Szczurek, A.
    Fiutowski, T.
    Idzik, M.
    Swientek, K.
    Terlecki, P.
    Korcyl, G.
    Lalik, R.
    Malige, A.
    Moskal, P.
    Nowakowski, K.
    Przygoda, W.
    Rathod, N.
    Rudy, Z.
    Salabura, P.
    Smyrski, J.
    Augustin, I.
    Böhm, R.
    Lehmann, I.
    Schmitt, L.
    Varentsov, V.
    Al-Turany, M.
    Belias, A.
    Deppe, H.
    Dzhygadlo, R.
    Flemming, H.
    Gerhardt, A.
    Götzen, K.
    Heinz, A.
    Jiang, P.
    Karabowicz, R.
    Koch, S.
    Kurilla, U.
    Lehmann, D.
    Lühning, J.
    Lynen, U.
    Orth, H.
    Peters, K.
    Rieger, J.
    Saito, T.
    Schepers, G.
    Schmidt, C. J.
    Schwarz, C.
    Schwiening, J.
    Täschner, A.
    Traxler, M.
    Voss, B.
    Wieczorek, P.
    Abazov, V.
    Alexeev, G.
    Arefiev, V. A.
    Astakhov, V.
    Barabanov, M. Y.
    Batyunya, B. V.
    Dodokhov, V. K.
    Efremov, A.
    Fechtchenko, A.
    Galoyan, A.
    Golovanov, G.
    Koshurnikov, E. K.
    Lobanov, Y. Y.
    Olshevskiy, A. G.
    Piskun, A. A.
    Samartsev, A.
    Shimanski, S.
    Skachkov, N. B.
    Skachkova, A. N.
    Strokovsky, E. A.
    Tokmenin, V.
    Uzhinsky, V.
    Verkheev, A.
    Vodopianov, A.
    Zhuravlev, N. I.
    Branford, D.
    Watts, D.
    Böhm, M.
    Eyrich, W.
    Lehmann, A.
    Miehling, D.
    Pfaffinger, M.
    Quin, N.
    Robison, L.
    Seth, K.
    Xiao, T.
    Bettoni, D.
    Ali, A.
    Hamdi, A.
    Himmelreich, M.
    Krebs, M.
    Nakhoul, S.
    Nerling, F.
    Belousov, A.
    Kisel, I.
    Kozlov, G.
    Pugach, M.
    Zyzak, M.
    Bianchi, N.
    Gianotti, P.
    Lucherini, V.
    Bracco, G.
    Bettner, Y.
    Bodenschatz, S.
    Brinkmann, K. T.
    Brück, L.
    Diehl, S.
    Dormenev, V.
    Düren, M.
    Erlen, T.
    Föhl, K.
    Hahn, C.
    Hayrapetyan, A.
    Hofmann, J.
    Kegel, S.
    Kesselkaul, M.
    Köseoglu, I.
    Kripko, A.
    Kühn, W.
    Lange, J. S.
    Metag, V.
    Moritz, M.
    Nanova, M.
    Novotny, R.
    Orsich, P.
    Pereira-de-Lira, J.
    Peter, M.
    Sachs, M.
    Schmidt, M.
    Schubert, R.
    Stenzel, H.
    Straube, M.
    Strickert, M.
    Thöring, U.
    Wasem, T.
    Wohlfahrt, B.
    Zaunick, H. G.
    Tomasi-Gustafsson, E.
    Glazier, D.
    Ireland, D.
    Seitz, B.
    Deepak, P. N.
    Kulkarni, A.
    Kappert, R.
    Kavatsyuk, M.
    Loehner, H.
    Messchendorp, J.
    Rodin, V.
    Schakel, P.
    Vejdani, S.
    Dutta, K.
    Kalita, K.
    Huang, G.
    Liu, D.
    Peng, H.
    Qi, H.
    Sun, Y.
    Zhou, X.
    Kunze, M.
    Azizi, K.
    Derichs, A.
    Dosdall, R.
    Esmail, W.
    Gillitzer, A.
    Goldenbaum, F.
    Grunwald, D.
    Jokhovets, L.
    Kannika, J.
    Kulessa, P.
    Orfanitski, S.
    Pérez Andrade, G.
    Prasuhn, D.
    Prencipe, E.
    Pütz, J.
    Ritman, J.
    Rosenthal, E.
    Schadmand, S.
    Schmitz, R.
    Scholl, A.
    Sefzick, T.
    Serdyuk, V.
    Stockmanns, T.
    Veretennikov, D.
    Wintz, P.
    Wüstner, P.
    Xu, H.
    Zhou, Y.
    Cao, X.
    Hu, Q.
    Li, Z.
    Li, H.
    Liang, Y.
    Ma, X.
    Rigato, V.
    Isaksson, L.
    Achenbach, P.
    Aycock, A.
    Corell, O.
    Denig, A.
    Distler, M.
    Hoek, M.
    Lauth, W.
    Leithoff, H. H.
    Merkel, H.
    Müller, U.
    Pochodzalla, J.
    Schlimme, S.
    Sfienti, C.
    Thiel, M.
    Zambrana, M.
    Ahmed, S.
    Bleser, S.
    Bölting, M.
    Capozza, L.
    Dbeyssi, A.
    Ehret, A.
    Grasemann, P.
    Klasen, R.
    Kliemt, R.
    Maas, F.
    Maldaner, S.
    Morales Morales, C.
    Motzko, C.
    Noll, O.
    Pflüger, S.
    Rodríguez Piñeiro, D.
    Schupp, F.
    Steinen, M.
    Wolff, S.
    Zimmermann, I.
    Fedorov, A.
    Kazlou, D.
    Korzhik, M.
    Missevitch, O.
    Balashoff, A.
    Boukharov, A.
    Malyshev, O.
    Balanutsa, P.
    Chernetsky, V.
    Demekhin, A.
    Dolgolenko, A.
    Fedorets, P.
    Gerasimov, A.
    Golubev, A.
    Goryachev, V.
    Kantsyrev, A.
    Kirin, D. Y.
    Kristi, N.
    Ladygina, E.
    Luschevskaya, E.
    Matveev, V. A.
    Panjushkin, V.
    Stavinskiy, A. V.
    Basant, K. N.
    Kumawat, H.
    Roy, B.
    Saxena, A.
    Yogesh, S.
    Bonaventura, D.
    Brand, P.
    Fritzsch, C.
    Grieser, S.
    Hargens, C.
    Hergemöller, A. K.
    Hetz, B.
    Hüsken, N.
    Kellers, J.
    Khoukaz, A.
    Bumrungkoh, D.
    Herold, C.
    Khosonthongkee, K.
    Kobdaj, C.
    Limphirat, A.
    Manasatitpong, K.
    Nasawad, T.
    Pongampai, S.
    Simantathammakul, T.
    Srisawad, P.
    Wongprachanukul, N.
    Yan, Y.
    Yu, C.
    Zhang, X.
    Zhu, W.
    Blinov, A. E.
    Kononov, S.
    Kravchenko, E. A.
    Antokhin, E.
    Barnyakov, A. Y.
    Beloborodov, K.
    Blinov, V. E.
    Kuyanov, I. A.
    Pivovarov, S.
    Pyata, E.
    Tikhonov, Y.
    Kunne, R.
    Ramstein, B.
    Hunter, G.
    Lattery, M.
    Pace, H.
    Boca, G.
    Duda, D.
    Finger, M.
    Finger, Jr, M.
    Kveton, A.
    Pesek, M.
    Peskova, M.
    Prochazka, I.
    Slunecka, M.
    Volf, M.
    Gallus, P.
    Jary, V.
    Korchak, O.
    Marcisovsky, M.
    Neue, G.
    Novy, J.
    Tomasek, L.
    Tomasek, M.
    Virius, M.
    Vrba, V.
    Abramov, V.
    Bukreeva, S.
    Chernichenko, S.
    Derevschikov, A.
    Ferapontov, V.
    Goncharenko, Y.
    Levin, A.
    Maslova, E.
    Melnik, Y.
    Meschanin, A.
    Minaev, N.
    Mochalov, V.
    Moiseev, V.
    Morozov, D.
    Nogach, L.
    Poslavskiy, S.
    Ryazantsev, A.
    Ryzhikov, S.
    Semenov, P.
    Shein, I.
    Uzunian, A.
    Vasiliev, A.
    Yakutin, A.
    Roy, U.
    Yabsley, B.
    Belostotski, S.
    Fedotov, G.
    Gavrilov, G.
    Izotov, A.
    Manaenkov, S.
    Miklukho, O.
    Zhdanov, A.
    Nyberg, Ayse
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Bäck, Torbjörn
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Makonyi, K.
    Preston, M.
    Tegner, P. E.
    Wölbing, D.
    Gandhi, K.
    Rai, A. K.
    Godre, S.
    Crede, V.
    Dobbs, S.
    Eugenio, P.
    Lersch, D.
    Calvo, D.
    De Remigis, P.
    Filippi, A.
    Mazza, G.
    Rivetti, A.
    Wheadon, R.
    Bussa, M. P.
    Spataro, S.
    Iazzi, F.
    Lavagno, A.
    Martin, A.
    Akram, A.
    Calen, H.
    Ikegami Andersson, W.
    Johansson, T.
    Kupsc, A.
    Marciniewski, P.
    Papenbrock, M.
    Regina, J.
    Schönning, K.
    Wolke, M.
    Diaz, J.
    Pothodi Chackara, V.
    Chlopik, A.
    Kesik, G.
    Melnychuk, D.
    Tarasiuk, J.
    Wojciechowski, M.
    Wronka, S.
    Zwieglinski, B.
    Amsler, C.
    Bühler, P.
    Kratochwil, N.
    Marton, J.
    Nalti, W.
    Steinschaden, D.
    Widmann, E.
    Zimmermann, S.
    Zmeskal, J.
    The potential of Λ and Ξ- studies with PANDA at FAIR2021In: European Physical Journal A, ISSN 1434-6001, E-ISSN 1434-601X, Vol. 57, no 4, article id 154Article in journal (Refereed)
    Abstract [en]

    The antiproton experiment PANDA at FAIR is designed to bring hadron physics to a new level in terms of scope, precision and accuracy. In this work, its unique capability for studies of hyperons is outlined. We discuss ground-state hyperons as diagnostic tools to study non-perturbative aspects of the strong interaction, and fundamental symmetries. New simulation studies have been carried out for two benchmark hyperon-antihyperon production channels: p¯ p→ Λ¯ Λ and p¯ p→ Ξ¯ +Ξ-. The results, presented in detail in this paper, show that hyperon-antihyperon pairs from these reactions can be exclusively reconstructed with high efficiency and very low background contamination. In addition, the polarisation and spin correlations have been studied, exploiting the weak, self-analysing decay of hyperons and antihyperons. Two independent approaches to the finite efficiency have been applied and evaluated: one standard multidimensional efficiency correction approach, and one efficiency independent approach. The applicability of the latter was thoroughly evaluated for all channels, beam momenta and observables. The standard method yields good results in all cases, and shows that spin observables can be studied with high precision and accuracy already in the first phase of data taking with PANDA.

  • 22. Barucca, G.
    et al.
    Davì, F.
    Lancioni, G.
    Mengucci, P.
    Montalto, L.
    Natali, P. P.
    Paone, N.
    Rinaldi, D.
    Scalise, L.
    Krusche, B.
    Steinacher, M.
    Liu, Z.
    Liu, C.
    Liu, B.
    Shen, X.
    Sun, S.
    Zhao, G.
    Zhao, J.
    Albrecht, M.
    Alkakhi, W.
    Bökelmann, S.
    Coen, S.
    Feldbauer, F.
    Fink, M.
    Frech, J.
    Freudenreich, V.
    Fritsch, M.
    Grochowski, J.
    Hagdorn, R.
    Heinsius, F. H.
    Held, T.
    Holtmann, T.
    Keshk, I.
    Koch, H.
    Kopf, B.
    Kümmel, M.
    Küßner, M.
    Li, J.
    Linzen, L.
    Maldaner, S.
    Oppotsch, J.
    Pankonin, S.
    Pelizä, M.
    Pflüger, S.
    Reher, J.
    Reicherz, G.
    Schnier, C.
    Steinke, M.
    Triffterer, T.
    Wenzel, C.
    Wiedner, U.
    Denizli, H.
    Er, N.
    Keskin, U.
    Yerlikaya, S.
    Yilmaz, A.
    Beck, R.
    Chauhan, V.
    Hammann, C.
    Hartmann, J.
    Ketzer, B.
    Müllers, J.
    Salisbury, B.
    Schmidt, C.
    Thoma, U.
    Urban, M.
    Bianconi, A.
    Bragadireanu, M.
    Pantea, D.
    Domagala, M.
    Filo, G.
    Lisowski, E.
    Lisowski, F.
    Michałek, M.
    Poznański, P.
    Płażek, J.
    Korcyl, K.
    Lebiedowicz, P.
    Pysz, K.
    Schäfer, W.
    Szczurek, A.
    Firlej, M.
    Fiutowski, T.
    Idzik, M.
    Moron, J.
    Swientek, K.
    Terlecki, P.
    Korcyl, G.
    Lalik, R.
    Malige, A.
    Moskal, P.
    Nowakowski, K.
    Przygoda, W.
    Rathod, N.
    Salabura, P.
    Smyrski, J.
    Augustin, I.
    Böhm, R.
    Lehmann, I.
    Schmitt, L.
    Varentsov, V.
    Al-Turany, M.
    Belias, A.
    Deppe, H.
    Dzhygadlo, R.
    Flemming, H.
    Gerhardt, A.
    Götzen, K.
    Heinz, A.
    Jiang, P.
    Karabowicz, R.
    Koch, S.
    Kurilla, U.
    Lehmann, D.
    Lühning, J.
    Lynen, U.
    Orth, H.
    Peters, K.
    Schepers, G.
    Schmidt, C. J.
    Schwarz, C.
    Schwiening, J.
    Täschner, A.
    Traxler, M.
    Voss, B.
    Wieczorek, P.
    Abazov, V.
    Alexeev, G.
    Barabanov, M. Y.
    Dodokhov, V. K.
    Efremov, A.
    Fechtchenko, A.
    Galoyan, A.
    Golovanov, G.
    Koshurnikov, E. K.
    Lobanov, Y. Y.
    Olshevskiy, A. G.
    Piskun, A. A.
    Samartsev, A.
    Shimanski, S.
    Skachkov, N. B.
    Skachkova, A. N.
    Strokovsky, E. A.
    Tokmenin, V.
    Uzhinsky, V.
    Verkheev, A.
    Vodopianov, A.
    Zhuravlev, N. I.
    Watts, D.
    Böhm, M.
    Eyrich, W.
    Lehmann, A.
    Miehling, D.
    Pfaffinger, M.
    Seth, K.
    Xiao, T.
    Ali, A.
    Hamdi, A.
    Himmelreich, M.
    Krebs, M.
    Nakhoul, S.
    Nerling, F.
    Gianotti, P.
    Lucherini, V.
    Bracco, G.
    Bodenschatz, S.
    Brinkmann, K. T.
    Brück, L.
    Diehl, S.
    Dormenev, V.
    Düren, M.
    Erlen, T.
    Hahn, C.
    Hayrapetyan, A.
    Hofmann, J.
    Kegel, S.
    Khalid, F.
    Köseoglu, I.
    Kripko, A.
    Kühn, W.
    Metag, V.
    Moritz, M.
    Nanova, M.
    Novotny, R.
    Orsich, P.
    Pereira-de-Lira, J.
    Sachs, M.
    Schmidt, M.
    Schubert, R.
    Strickert, M.
    Wasem, T.
    Zaunick, H. G.
    Tomasi-Gustafsson, E.
    Glazier, D.
    Ireland, D.
    Seitz, B.
    Kappert, R.
    Kavatsyuk, M.
    Loehner, H.
    Messchendorp, J.
    Rodin, V.
    Kalita, K.
    Huang, G.
    Liu, D.
    Peng, H.
    Qi, H.
    Sun, Y.
    Zhou, X.
    Kunze, M.
    Azizi, K.
    Olgun, A. T.
    Tavukoglu, Z.
    Derichs, A.
    Dosdall, R.
    Esmail, W.
    Gillitzer, A.
    Goldenbaum, F.
    Grunwald, D.
    Jokhovets, L.
    Kannika, J.
    Kulessa, P.
    Orfanitski, S.
    Pérez-Andrade, G.
    Prasuhn, D.
    Prencipe, E.
    Pütz, J.
    Ritman, J.
    Rosenthal, E.
    Schadmand, S.
    Schmitz, R.
    Scholl, A.
    Sefzick, T.
    Serdyuk, V.
    Stockmanns, T.
    Veretennikov, D.
    Wintz, P.
    Wüstner, P.
    Xu, H.
    Zhou, Y.
    Cao, X.
    Hu, Q.
    Liang, Y.
    Rigato, V.
    Isaksson, L.
    Achenbach, P.
    Corell, O.
    Denig, A.
    Distler, M.
    Hoek, M.
    Lauth, W.
    Leithoff, H. H.
    Merkel, H.
    Müller, U.
    Petersen, J.
    Pochodzalla, J.
    Schlimme, S.
    Sfienti, C.
    Thiel, M.
    Bleser, S.
    Bölting, M.
    Capozza, L.
    Dbeyssi, A.
    Ehret, A.
    Klasen, R.
    Kliemt, R.
    Maas, F.
    Motzko, C.
    Noll, O.
    Piñeiro, D. R.
    Schupp, F.
    Steinen, M.
    Wolff, S.
    Zimmermann, I.
    Kazlou, D.
    Korzhik, M.
    Missevitch, O.
    Balanutsa, P.
    Chernetsky, V.
    Demekhin, A.
    Dolgolenko, A.
    Fedorets, P.
    Gerasimov, A.
    Golubev, A.
    Kantsyrev, A.
    Kirin, D. Y.
    Kristi, N.
    Ladygina, E.
    Luschevskaya, E.
    Matveev, V. A.
    Panjushkin, V.
    Stavinskiy, A. V.
    Balashoff, A.
    Boukharov, A.
    Bukharova, M.
    Malyshev, O.
    Vishnevsky, E.
    Bonaventura, D.
    Brand, P.
    Hetz, B.
    Hüsken, N.
    Kellers, J.
    Khoukaz, A.
    Klostermann, D.
    Mannweiler, C.
    Vestrick, S.
    Bumrungkoh, D.
    Herold, C.
    Khosonthongkee, K.
    Kobdaj, C.
    Limphirat, A.
    Manasatitpong, K.
    Nasawad, T.
    Pongampai, S.
    Simantathammakul, T.
    Srisawad, P.
    Wongprachanukul, N.
    Yan, Y.
    Yu, C.
    Zhang, X.
    Zhu, W.
    Antokhin, E.
    Barnyakov, A. Y.
    Beloborodov, K.
    Blinov, V. E.
    Kuyanov, I. A.
    Pivovarov, S.
    Pyata, E.
    Tikhonov, Y.
    Blinov, A. E.
    Kononov, S.
    Kravchenko, E. A.
    Lattery, M.
    Boca, G.
    Duda, D.
    Finger, M.
    Finger, Jr, M.
    Kveton, A.
    Pesek, M.
    Peskova, M.
    Prochazka, I.
    Slunecka, M.
    Volf, M.
    Gallus, P.
    Jary, V.
    Korchak, O.
    Marcisovsky, M.
    Neue, G.
    Novy, J.
    Tomasek, L.
    Tomasek, M.
    Virius, M.
    Vrba, V.
    Abramov, V.
    Bukreeva, S.
    Chernichenko, S.
    Derevschikov, A.
    Ferapontov, V.
    Goncharenko, Y.
    Levin, A.
    Maslova, E.
    Melnik, Y.
    Meschanin, A.
    Minaev, N.
    Mochalov, V.
    Moiseev, V.
    Morozov, D.
    Nogach, L.
    Poslavskiy, S.
    Ryazantsev, A.
    Ryzhikov, S.
    Semenov, P.
    Shein, I.
    Uzunian, A.
    Vasiliev, A.
    Yakutin, A.
    Belostotski, S.
    Fedotov, G.
    Izotov, A.
    Manaenkov, S.
    Miklukho, O.
    Preston, M.
    Tegner, P. E.
    Wölbing, D.
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Gandhi, K.
    Rai, A. K.
    Godre, S.
    Crede, V.
    Dobbs, S.
    Eugenio, P.
    Calvo, D.
    De Remigis, P.
    Filippi, A.
    Mazza, G.
    Wheadon, R.
    Iazzi, F.
    Lavagno, A.
    Bussa, M. P.
    Spataro, S.
    Akram, A.
    Calen, H.
    Ikegami Andersson, W.
    Johansson, T.
    Kupsc, A.
    Marciniewski, P.
    Papenbrock, M.
    Regina, J.
    Rieger, J.
    Schönning, K.
    Wolke, M.
    Chlopik, A.
    Kesik, G.
    Melnychuk, D.
    Tarasiuk, J.
    Wronka, S.
    Zwieglinski, B.
    Amsler, C.
    Bühler, P.
    Marton, J.
    Zimmermann, S.
    Study of excited Ξ baryons with the P¯ ANDA detector2021In: European Physical Journal A, ISSN 1434-6001, E-ISSN 1434-601X, Vol. 57, no 4, article id 149Article in journal (Refereed)
    Abstract [en]

    The study of baryon excitation spectra provides insight into the inner structure of baryons. So far, most of the world-wide efforts have been directed towards N∗ and Δ spectroscopy. Nevertheless, the study of the double and triple strange baryon spectrum provides independent information to the N∗ and Δ spectra. The future antiproton experiment P¯ANDA will provide direct access to final states containing a Ξ¯ Ξ pair, for which production cross sections up to μb are expected in p¯p reactions. With a luminosity of L= 10 31 cm- 2 s- 1 in the first phase of the experiment, the expected cross sections correspond to a production rate of ∼106events/day. With a nearly 4 π detector acceptance, P¯ANDA will thus be a hyperon factory. In this study, reactions of the type p¯p → Ξ¯ +Ξ∗ - as well as p¯p → Ξ¯ ∗ +Ξ- with various decay modes are investigated. For the exclusive reconstruction of the signal events a full decay tree fit is used, resulting in reconstruction efficiencies between 3 and 5%. This allows high statistics data to be collected within a few weeks of data taking.

  • 23. Beausang, C W
    et al.
    Fallon, P
    Appelbe, D E
    Aztalos, S
    Clark, R M
    Clarke, S
    Cederwall, Bo
    Deleplanque, M A
    Diamond, R M
    Erturk, S
    Kelly, W
    Lee, I Y
    Macchaivelli, A O
    Patterson, D C
    Smith, M B
    Stephens, F S
    Twin, P J
    Wilson, A N
    Lifetimes of yrast and excited superdeformed states in Gd-150: effect of particle-hole excitations on the deformation1998In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 417, no 1-2, p. 13-19Article in journal (Refereed)
    Abstract [en]

    The quadrupole moments and deformations have been measured for six superdeformed bands in Gd-150. The results indicate evidence for deformation driving properties of both the high-hi intruder and also low-N natural parity states at the superdeformed Fermi surface. Several new transitions have been identified and placed in the low spin non-yrast portion of one of the SD bands.

  • 24. BECKER, JA
    et al.
    Cederwall, Bo
    DELEPLANQUE, MA
    DIAMOND, RM
    FALLON, P
    HUA, PF
    LEE, IY
    MACCHIAVELLI, AO
    SALADIN, JX
    SARANTITES, DG
    SOBOTKA, LG
    STEPHENS, FS
    WOZNIAK, GJ
    YU, CH
    GAMMA-RAY SPECTROSCOPY USING DEEP-INELASTIC REACTIONS1994In: Abstracts of Papers of the American Chemical Society, ISSN 0065-7727, Vol. 208, p. 10-NUCLArticle in journal (Refereed)
  • 25. BERNSTEIN, LA
    et al.
    CIZEWSKI, JA
    JIN, HQ
    YOUNES, W
    HENRY, RG
    FARRIS, LP
    CHAROS, A
    CARPENTER, MP
    JANSSENS, RVF
    KHOO, TL
    LAURITSEN, T
    BEARDEN, IG
    YE, D
    BECKER, JA
    HENRY, EA
    BRINKMAN, MJ
    HUGHES, JR
    KUHNERT, A
    WANG, TF
    STOYER, MA
    DIAMOND, RM
    STEPHENS, FS
    DELEPLANQUE, MA
    MACCHIAVELLI, AO
    LEE, IY
    Cederwall, Bo
    OLIVEIRA, JRB
    BURDE, J
    FALLON, P
    DUYAR, C
    DRAPER, JE
    RUBEL, E
    VO, DT
    ONSET OF COLLECTIVITY IN NEUTRON-DEFICIENT PO-196,PO-1981995In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 52, no 2, p. 621-627Article in journal (Refereed)
    Abstract [en]

    We have studied via in-beam gamma-ray spectroscopy Po-196 and Po-198, which are the first neutron-deficient Po isotopes to exhibit a collective low-lying structure. The ratios of yrast state energies and the E2 branching ratios of transitions from non-yrast to yrast states are indicative of a low-lying vibrational structure. The onset of collective motion in these isotopes can be attributed to the opening of the neutron i(13/2) orbital at N approximate to 112 and the resulting large overlap between the two valence protons in the h(9/2) orbital and the valence neutrons in the i(13/2) orbital.

  • 26. BERNSTEIN, LA
    et al.
    HUGHES, JR
    BECKER, JA
    FARRIS, LP
    HENRY, EA
    ASZTALOS, SJ
    Cederwall, Bo
    CLARK, RM
    DELEPLANQUE, MA
    DIAMOND, RM
    FALLON, P
    LEE, IY
    MACCHIAVELLI, AO
    STEPHENS, FS
    CIZEWSKI, JA
    YOUNES, W
    SUPERDEFORMATION IN ER-1541995In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 52, no 3, p. R1171-R1174Article in journal (Refereed)
    Abstract [en]

    A superdeformed (SD) band consisting of 13 gamma-ray transitions has been observed in Er-154, an isotone of Dy-152(66). The experiment was performed using the Sn-118(Ar-40,4n) reaction at E(Ar-40)=185 MeV and the early implementation of GAMMASPHERE. This is an observation of a SD band in the A approximate to 150 region with a proton number greater than 66. The J((2)) moment of inertia of the band is constant above ($) over bar h omega=0.45 MeV and shows a sharp rise below this value suggesting a paired band crossing. These results suggest that total Routhian surface calculations fail to accurately predict the deformation of the band.

  • 27. Bianco, L.
    et al.
    Page, R. D.
    Darby, I. G.
    Joss, D. T.
    Simpson, J.
    Al-Khalili, J. J.
    Cannon, A. J.
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Eeckhaudt, S.
    Erturk, S.
    Gall, B.
    Hornillos, M. B. Gomez
    Grahn, T.
    Greenlees, P. T.
    Hadinia, Baharak
    KTH, School of Engineering Sciences (SCI), Physics.
    Heyde, K.
    Jakobsson, U.
    Jones, P. M.
    Julin, R.
    Juutinen, S.
    Ketelhut, S.
    Labiche, M.
    Leino, M.
    Leppanen, A. -P
    Nyman, M.
    O'Donnell, D.
    Paul, E. S.
    Petri, M.
    Peura, P.
    Puurunen, A.
    Rahkila, P.
    Ruotsalainen, P.
    Sandzelius, Mikael
    KTH, School of Engineering Sciences (SCI), Physics.
    Sapple, P. J.
    Saren, J.
    Scholey, C.
    Smirnova, N. A.
    Steer, A. N.
    Stevenson, P. D.
    Suckling, E. B.
    Thomson, J.
    Uusitalo, J.
    Venhart, M.
    Discovery of W-157 and Os-1612010In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 690, no 1, p. 15-18Article in journal (Refereed)
    Abstract [en]

    The nuclides W-157 and Os-161 have been discovered ill reactions of Ni-58 ion beams with a Cd-106 target. The Os-161 alpha-decay energy and half-life were 6890 +/- 12 keV and 640 +/- 60 mu s. The daughter W-157 nuclei beta-decayed with a half-life of 275 +/- 40 ms, populating both low-lying alpha-decaying states in Ta-157, which is consistent with a 7/2(-) ground state in W-157. Fine structure observed in the alpha decay of Os-161 places the lowest excited state in W-157 with 1(pi) = 9/2(-) at 318 +/- 30 key. The branching ratio of 5.5(-2.2)(+3.1)% indicates that Os-161 also has a 7/2(-) ground state. Shell-model calculations analysing the effects of monopole shifts and a tensor force on the relative energies of 2f(7/2) and 1h(9/2) neutron states in N = 83 isotones are presented. (C) 2010 Elsevier B.V. All rights reserved.

  • 28. Bianco, L.
    et al.
    Page, R. D.
    Joss, D. T.
    Simpson, J.
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Hornillos, M. B. G.
    Greenlees, P. T.
    Hadinia, B.
    Jakobsson, U.
    Jones, P. M.
    et al,
    alpha-Decay branching ratios measured by gamma-ray tagging2008In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 597, no 2-3, p. 189-191Article, review/survey (Refereed)
    Abstract [en]

    The nuclides Pt168-170 were produced by bombarding isotopically enriched Mo-92,Mo-94 targets with 336, 348 MeV Kr-78 ions. Prompt gamma rays were detected at the target position and provided a selection criterion for the Pt168-170 nuclei. This technique enables the problem of the background from higher-energy alpha decays in the spectrum to be circumvented. The Pt nuclei were separated in flight using the gas-filled separator RITU and implanted into the GREAT spectrometer, which was used to study subsequent alpha decays. The alpha-decay branching ratios of Os164-166 were deduced from the fraction of selected Pt168-170 nuclei correlated with a decays Of Os164-166. The resulting branching ratios agree with the literature values but can have improved precision.

  • 29.
    Biswas, S.
    et al.
    CNRS, GANIL, CEA, IN2P3,DRF, Bd Henri Becquerel,BP 55027, F-14076 Caen 5, France..
    Lemasson, A.
    CNRS, GANIL, CEA, IN2P3,DRF, Bd Henri Becquerel,BP 55027, F-14076 Caen 5, France..
    Rejmund, M.
    CNRS, GANIL, CEA, IN2P3,DRF, Bd Henri Becquerel,BP 55027, F-14076 Caen 5, France..
    Navin, A.
    CNRS, GANIL, CEA, IN2P3,DRF, Bd Henri Becquerel,BP 55027, F-14076 Caen 5, France..
    Kim, Y. H.
    CNRS, GANIL, CEA, IN2P3,DRF, Bd Henri Becquerel,BP 55027, F-14076 Caen 5, France.;Inst Laue Langevin, F-38042 Grenoble, France..
    Michelagnoli, C.
    CNRS, GANIL, CEA, IN2P3,DRF, Bd Henri Becquerel,BP 55027, F-14076 Caen 5, France.;Inst Laue Langevin, F-38042 Grenoble, France..
    Stefan, I
    Univ Paris Saclay, Univ Paris Sud, Inst Phys Nucl, IN2P3,CNRS, F-91406 Orsay, France..
    Banik, R.
    Variable Energy Cyclotron Ctr, 1-AF Bidhan Nagar, Kolkata 700064, India.;Homi Bhabha Natl Inst, Training Sch Complex, Mumbai 400094, Maharashtra, India..
    Bednarczyk, P.
    Inst Nucl Phys PAN, Krakow, Poland..
    Bhattacharya, S.
    Variable Energy Cyclotron Ctr, 1-AF Bidhan Nagar, Kolkata 700064, India.;Homi Bhabha Natl Inst, Training Sch Complex, Mumbai 400094, Maharashtra, India..
    Bhattacharyya, S.
    Variable Energy Cyclotron Ctr, 1-AF Bidhan Nagar, Kolkata 700064, India.;Homi Bhabha Natl Inst, Training Sch Complex, Mumbai 400094, Maharashtra, India..
    Clement, E.
    CNRS, GANIL, CEA, IN2P3,DRF, Bd Henri Becquerel,BP 55027, F-14076 Caen 5, France..
    Crawford, H. L.
    Lawrence Berkeley Natl Lab, Nucl Sci Div, Berkeley, CA 94720 USA..
    de France, G.
    CNRS, GANIL, CEA, IN2P3,DRF, Bd Henri Becquerel,BP 55027, F-14076 Caen 5, France..
    Fallon, P.
    Lawrence Berkeley Natl Lab, Nucl Sci Div, Berkeley, CA 94720 USA..
    Fremont, G.
    CNRS, GANIL, CEA, IN2P3,DRF, Bd Henri Becquerel,BP 55027, F-14076 Caen 5, France..
    Goupil, J.
    CNRS, GANIL, CEA, IN2P3,DRF, Bd Henri Becquerel,BP 55027, F-14076 Caen 5, France..
    Jacquot, B.
    CNRS, GANIL, CEA, IN2P3,DRF, Bd Henri Becquerel,BP 55027, F-14076 Caen 5, France..
    Li, H. J.
    CNRS, GANIL, CEA, IN2P3,DRF, Bd Henri Becquerel,BP 55027, F-14076 Caen 5, France..
    Ljungvall, J.
    Univ Paris Saclay, Univ Paris Sud, CSNSM, CNRS,IN2P3, F-91405 Orsay, France..
    Maj, A.
    Inst Nucl Phys PAN, Krakow, Poland..
    Menager, A.
    CNRS, GANIL, CEA, IN2P3,DRF, Bd Henri Becquerel,BP 55027, F-14076 Caen 5, France..
    More, V
    CNRS, GANIL, CEA, IN2P3,DRF, Bd Henri Becquerel,BP 55027, F-14076 Caen 5, France..
    Palit, R.
    Tata Inst Fundamental Res, Dept Nucl & Atom Phys, Mumbai 400005, Maharashtra, India..
    Perez-Vidal, R. M.
    Univ Valencia, CSIC, Inst Fis Corpuscular, E-46980 Valencia, Spain..
    Ropert, J.
    CNRS, GANIL, CEA, IN2P3,DRF, Bd Henri Becquerel,BP 55027, F-14076 Caen 5, France..
    Barrientos, D.
    CERN, CH-1211 Geneva 23, Switzerland..
    Benzoni, G.
    Ist Nazl Fis Nucl, Sez Milano, Milan, Italy..
    Birkenbach, B.
    Univ Cologne, Inst Kernphys, Zulpicher Str 77, D-50937 Cologne, Germany..
    Boston, A. J.
    Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England..
    Boston, H. C.
    Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England..
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics.
    Collado, J.
    Univ Valencia, Dept Ingn Elect, Valencia, Spain..
    Cullen, D. M.
    Univ Manchester, Schuster Lab, Nucl Phys Grp, Manchester M13 9PL, Lancs, England..
    Desesquelles, P.
    Univ Paris Saclay, Univ Paris Sud, CSNSM, CNRS,IN2P3, F-91405 Orsay, France..
    Domingo-Pardo, C.
    Univ Valencia, CSIC, Inst Fis Corpuscular, E-46980 Valencia, Spain..
    Dudouet, J.
    Univ Paris Saclay, Univ Paris Sud, CSNSM, CNRS,IN2P3, F-91405 Orsay, France.;Univ Lyon 1, Univ Lyon, CNRS, IN2P3,UMR5822,IPNL, 4 Rue Enrico Fermi, F-69622 Villeurbanne, France..
    Eberth, J.
    Univ Cologne, Inst Kernphys, Zulpicher Str 77, D-50937 Cologne, Germany..
    Gonzalez, V
    Univ Valencia, Dept Ingn Elect, Valencia, Spain..
    Harkness-Brennan, L. J.
    Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England..
    Hess, H.
    Univ Cologne, Inst Kernphys, Zulpicher Str 77, D-50937 Cologne, Germany..
    Jungclaus, A.
    CSIC, Inst Estruct Mat, E-28006 Madrid, Spain..
    Korten, W.
    CEA, DRF, IRFU, Ctr CEA Saclay, F-91191 Gif Sur Yvette, France..
    Labiche, M.
    STFC Daresbury Lab, Warrington WA4 4AD, Cheshire, England..
    Lefevre, A.
    CNRS, GANIL, CEA, IN2P3,DRF, Bd Henri Becquerel,BP 55027, F-14076 Caen 5, France..
    Menegazzo, R.
    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy..
    Mengoni, D.
    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy..
    Million, B.
    Ist Nazl Fis Nucl, Sez Milano, Milan, Italy..
    Napoli, D. R.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, Via Romea 4, I-35020 Legnaro, Italy..
    Pullia, A.
    Ist Nazl Fis Nucl, Sez Milano, Milan, Italy.;Univ Milan, Dipartimento Fis, I-20133 Milan, Italy..
    Quintana, B.
    Univ Salamanca, Lab Radiac Ionizantes, E-37008 Salamanca, Spain..
    Ralet, D.
    Univ Paris Saclay, Univ Paris Sud, CSNSM, CNRS,IN2P3, F-91405 Orsay, France.;Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany.;Helmholtzzentrum Schwerionenforsch GmbH, GSI, D-64291 Darmstadt, Germany..
    Recchia, F.
    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy..
    Reiter, P.
    Univ Cologne, Inst Kernphys, Zulpicher Str 77, D-50937 Cologne, Germany..
    Saillant, F.
    CNRS, GANIL, CEA, IN2P3,DRF, Bd Henri Becquerel,BP 55027, F-14076 Caen 5, France..
    Salsac, M. D.
    CEA, DRF, IRFU, Ctr CEA Saclay, F-91191 Gif Sur Yvette, France..
    Sanchis, E.
    Univ Valencia, Dept Ingn Elect, Valencia, Spain..
    Stezowski, O.
    Univ Lyon 1, Univ Lyon, CNRS, IN2P3,UMR5822,IPNL, 4 Rue Enrico Fermi, F-69622 Villeurbanne, France..
    Theisen, Ch
    CEA, DRF, IRFU, Ctr CEA Saclay, F-91191 Gif Sur Yvette, France..
    Valiente-Dobon, J. J.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, Via Romea 4, I-35020 Legnaro, Italy..
    Zielinska, M.
    CEA, DRF, IRFU, Ctr CEA Saclay, F-91191 Gif Sur Yvette, France..
    Effects of one valence proton on seniority and angular momentum of neutrons in neutron-rich(51)( 122-)(131)Sb isotopes2019In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 99, no 6, article id 064302Article in journal (Refereed)
    Abstract [en]

    Background: Levels fulfilling the seniority scheme and relevant isomers are commonly observed features in semimagic nuclei; for example, in Sn isotopes (Z = 50). Seniority isomers in Sn, with dominantly pure neutron configurations, directly probe the underlying neutron-neutron (vv) interaction. Furthermore, an addition of a valence proton particle or hole, through neutron-proton (v pi) interaction, affects the neutron seniority as well as the angular momentum. Purpose: Benchmark the reproducibility of the experimental observables, like the excitation energies (E-x) and the reduced electric-quadrupole transition probabilities [B(E2)], with the results obtained from shell-model interactions for neutron-rich Sn and Sb isotopes with N < 82. Study the sensitivity of the aforementioned experimental observables to the model interaction components. Furthermore, explore from a microscopic point of view the structural similarity between the isomers in Sn and Sb, and thus the importance of the valence proton. Methods: The neutron-rich Sb122-131 isotopes were produced as fission fragments in the reaction Be-9(U-238, f) with 6.2 MeV/u beam energy. A unique setup, consisting of AGATA, VAMOS++, and EXOGAM detectors, was used which enabled the prompt-delayed gamma-ray spectroscopy of fission fragments in the time range of 100 ns to 200 mu s. Results: New isomers and prompt and delayed transitions were established in the even-A Sb122-131 isotopes. In the odd-A Sb122-131 isotopes, new prompt and delayed gamma-ray transitions were identified, in addition to the confirmation of the previously known isomers. The half-lives of the isomeric states and the B(E2) transition probabilities of the observed transitions depopulating these isomers were extracted. Conclusions: The experimental data was compared with the theoretical results obtained in the framework of large-scale shell-model (LSSM) calculations in a restricted model space. Modifications of several components of the shell-model interaction were introduced to obtain a consistent agreement with the excitation energies and the B(E2) transition probabilities in neutron-rich Sn and Sb isotopes. The isomeric configurations in Sn and Sb were found to be relatively pure. Furthermore, the calculations revealed that the presence of a single valence proton, mainly in the g(7/2) orbital in Sb isotopes, leads to significant mixing (due to the v pi interaction) of (i) the neutron seniorities (upsilon(v)) and (ii) the neutron angular momentum (I-v). The above features have a weak impact on the excitation energies, but have an important impact on the B(E2) transition probabilities. In addition, a constancy of the relative excitation energies irrespective of neutron seniority and neutron number in Sn and Sb was observed.

  • 30. Blazhev, A.
    et al.
    Gorska, M.
    Grawe, H.
    Nyberg, J.
    Palacz, M.
    Caurier, E.
    Cederwall, Bo
    KTH, Superseded Departments (pre-2005), Physics.
    et al,
    Observation of a core-excited E4 isomer in Cd-982004In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 69, no 6Article in journal (Refereed)
    Abstract [en]

    A core-excited I-pi=(12(+)) spin-gap isomer was identified in Cd-98 in an experiment at EUROBALL IV. It was found to feed the known I-pi=(8(+)) seniority isomer by an E4 transition. Half-lives of T-1/2=0.23 ((+4)(-3)) mus and 0.17 ((+6)(-4)) mus were measured for the two states at E-x=6635 keV and 2428 keV, respectively. From the excitation energy of the core-excited isomer a Sn-100 shell gap of 6.46(15) MeV is inferred. The measured E4 and E2 strengths, Sn-100 core excitations and the origin of empirical polarization charges are discussed in the framework of large-scale shell model calculations. An E2 polarization charge for protons of deltae(pi)

  • 31.
    Boso, A.
    et al.
    Univ Padua, Dipartimento Fis & Astron Galileo Galilei, I-35131 Padua, Italy.;Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.;Natl Phys Lab, Hampton Rd, Teddington TW11 0LW, Middx, England..
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Wieland, O.
    Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy..
    Isospin dependence of electromagnetic transition strengths among an isobaric triplet2019In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 797, article id UNSP 134835Article in journal (Refereed)
    Abstract [en]

    Electric quadrupole matrix elements, M-p, for the J(pi) = 2(+) -> 0(+), Delta T = 0, T = 1 transitions across the A = 46 isobaric multiplet Cr-46-V-46-Ti-46 have been measured at GSI with the FRS-LYCCA-AGATA setup. This allows direct insight into the isospin purity of the states of interest by testing the linearity of M-p with respect to T-z. Pairs of nuclei in the T = 1 triplet were studied using identical reaction mechanisms in order to control systematic errors. The M-p values were obtained with two different methodologies: (i) a relativistic Coulomb excitation experiment was performed for Cr-46 and Ti-46; (ii) a "stretched target" technique was adopted here, for the first time, for lifetime measurements in V-46 and Ti-46. A constant value of M-p across the triplet has been observed. Shell-model calculations performed within the fp shell fail to reproduce this unexpected trend, pointing towards the need of a wider valence space. This result is confirmed by the good agreement with experimental data achieved with an interaction which allows excitations from the underlying sd shell. A test of the linearity rule for all published data on complete T = 1 isospin triplets is presented.

  • 32. Boso, A.
    et al.
    Lenzi, S. M.
    Recchia, F.
    Bonnard, J.
    Aydin, S.
    Bentley, M. A.
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Clement, E.
    De France, G.
    Di Nitto, A.
    Dijon, A.
    Doncel, Maria
    KTH, School of Engineering Sciences (SCI), Physics.
    Ghazi Moradi, Farnaz
    KTH, School of Engineering Sciences (SCI), Physics.
    Gottardo, A.
    Henry, T.
    Huyuk, T.
    Jaworski, G.
    John, P. R.
    Juhasz, K.
    Kuti, I.
    Melon, B.
    Mengoni, D.
    Michelagnoli, C.
    Modamio, V.
    Napoli, D. R.
    Nyako, B. M.
    Nyberg, J.
    Palacz, M.
    Valiente-Dobon, J. J.
    ISOSPIN SYMMETRY BREAKING IN MIRROR NUCLEI Mg-23-Na-232017In: Acta Physica Polonica B, ISSN 0587-4254, E-ISSN 1509-5770, Vol. 48, no 3, p. 313-318Article in journal (Refereed)
    Abstract [en]

    Mirror energy differences (MED) are a direct consequence of isospin symmetry breaking. Moreover, the study of MED has proved to give valuable information of several nuclear structure properties. We present the results of an experiment performed in GANIL to study the MED in mirror nuclei Mg-23-Na-23 up to high spin. The experimental values are compared with state-of-the-art shell model calculations. This permits to enlighten several nuclear structure properties, such as the way in which the nucleons alignment proceeds, the radius variation with J, the role of the spin-orbit interaction and the importance of isospin symmetry breaking terms of nuclear origin.

  • 33. Boso, A.
    et al.
    Lenzi, S. M.
    Recchia, F.
    Bonnard, J.
    Zuker, A. P.
    Aydin, S.
    Bentley, M. A.
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Clement, E.
    de France, G.
    Di Nitto, A.
    Dijon, A.
    Doncel, M.
    Ghazi-Moradi, F.
    Gadea, A.
    Gottardo, A.
    Henry, T.
    Huyuk, T.
    Jaworski, G.
    John, P. R.
    Juhasz, K.
    Kuti, I
    Melon, B.
    Mengoni, D.
    Michelagnoli, C.
    Modamio, V
    Napoli, D. R.
    Nyako, B. M.
    Nyberg, J.
    Palacz, M.
    Timar, J.
    Valiente-Dobon, J. J.
    Neutron Skin Effects in Mirror Energy Differences: The Case of Mg-23-Na-232018In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 121, no 3, article id 032502Article in journal (Refereed)
    Abstract [en]

    Energy differences between analogue states in the T = 1/2 Mg-23-Na-23 mirror nuclei have been measured along the rotational yrast bands. This allows us to search for effects arising from isospin-symmetrybreaking interactions (ISB) and/or shape changes. Data are interpreted in the shell model framework following the method successfully applied to nuclei in the f(7/2) shell. It is shown that the introduction of a schematic ISB interaction of the same type of that used in the f(7/2) shell is needed to reproduce the data. An alternative novel description, applied here for the first time, relies on the use of an effective interaction deduced from a realistic charge-dependent chiral nucleon-nucleon potential. This analysis provides two important results: (i) The mirror energy differences give direct insight into the nuclear skin; (ii) the skin changes along the rotational bands are strongly correlated with the difference between the neutron and proton occupations of the s(1/2) "halo" orbit.

  • 34.
    Bradbury, J.
    et al.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, Padua, Italy.;Univ Padua, Dipartimento Fis & Astron, Padua, Italy.;Univ Surrey, Guildford, Surrey, England..
    Testov, D.
    Univ Padua, Dipartimento Fis & Astron, Padua, Italy.;Ist Nazl Fis Nucl, Sez Padova, Padua, Italy.;Joint Inst Nucl Res, Dubna, Moscow Region, Russia..
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics. KTH Royal Inst Technol, Stockholm, Sweden..
    Liu, Haichun
    KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Theoretical Chemistry and Biology.
    Szilner, S.
    Rudjer Boskovic Inst, Zagreb, Croatia..
    Lifetime measurements using a plunger device and the EUCLIDES Si array at the GALILEO gamma-ray spectrometer2020In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 979, article id 164345Article in journal (Refereed)
    Abstract [en]

    The GALILEO gamma-ray spectrometer, installed at the Laboratori Nazionali di Legnaro (LNL), benefits from intense stable beams provided by the Tandem-ALPI-PIAVE accelerator complex and from radioactive beams to be delivered in the near future by the SPES facility. The spectrometer is complemented with a variety of ancillary devices to allow for nuclear structure and reaction studies. The 4 pi Si-ball array EUCLIDES coupled to the GALILEO gamma-ray spectrometer represents one of the commonly used setup for experiments aiming at spectroscopic studies. High-efficiency detection of light-charged particles in a fusion-evaporation reaction guarantees good discrimination of different reaction channels and provides essential information for the kinematic reconstruction. In this paper we discuss a configuration of the EUCLIDES array developed for the lifetime measurements of nuclear excited states populated in a fusion-evaporation reaction. In such a configuration a part of the EUCLIDES detectors is disassembled allowing for the installation of a plunger device in the reaction chamber. The reduced configuration of EUCLIDES provides high detection efficiency necessary for reliable light charged-particle discrimination. We report on the commissioning experiment focused on the Ni-58(Ni-58,3p)I-113 reaction. The lifetimes of 11/2(-) and 15/2(-) states were measured by applying the Recoil Distance Doppler Shift method to be equal to 206(20) ps and 7.9(12) ps correspondingly and were in good agreement with the values cited in the literature. Thus, the combination of the GALILEO and EUCLIDES arrays, and the plunger device has resulted in a powerful experimental setup to determine lifetimes of excited states in neutron-deficient nuclei in the picosecond range.

  • 35. Brehwens, Karl
    et al.
    Bajinskis, Ainars
    Staaf, Elina
    Haghdoost, Siamak
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Wojcik, Andrzej
    A new device to expose cells to changing dose rates of ionising radiation2012In: Radiation Protection Dosimetry, ISSN 0144-8420, E-ISSN 1742-3406, Vol. 148, no 3, p. 366-371Article in journal (Refereed)
    Abstract [en]

    In many exposure scenarios to ionising radiation, the dose rate is not constant. Despite this, most in vitro studies aimed at investigating the effects of ionising radiation are carried out exposing samples at constant dose rates. Consequently, very little data exist on the biological effects of exposures to changing dose rates. This may be due to technical limitations of standard irradiation facilities, but also to the fact that the importance of research in this area has not been appreciated. We have recently shown that cells exposed to a decreasing dose rate suffer higher levels of cytogenetic damage than do cells exposed to an increasing or a constant dose rate. To further study the effects of changing dose rates, a new device was constructed that permits the exposure of cell samples in tubes, flasks or Petri dishes to changing dose rates of X-rays. This report presents the technical data, performance and dosimetry of this novel device.

  • 36. Brinkman, M J
    et al.
    Becker, J A
    Lee, I Y
    Farris, L P
    Henry, E A
    Hoff, R W
    Hughes, J R
    Stoyer, M A
    Bernstein, L A
    Cizewski, J A
    Jin, H Q
    Younes, W
    Cederwall, Bo
    Deleplanque, M A
    Diamond, R M
    Fallon, P
    Macchiavelli, A O
    Stephens, F S
    Kelly, W H
    Vo, D T
    Draper, J E
    Duyar, C
    Rubel, E
    Decay from a superdeformed band in Pb-1941996In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 53, no 4, p. R1461-R1464Article in journal (Refereed)
    Abstract [en]

    Three experiments using the (174) Yb(Mg-25,5n)Pb-194 reaction have been undertaken at the Early Implementation of Gammasphere to study the decay of known superdeformed states in Pb-194. A single discrete transition with an energy of 2.746(2) MeV carrying 6(2)% of the full superdeformed band intensity has been identified. A discussion of our results and the assignment of the 2.746-MeV transition as a discrete gamma ray directly connecting the superdeformed 8(+) and low-lying 6(+) levels will be presented.

  • 37.
    Bäck, Torbjörn
    et al.
    KTH, School of Engineering Sciences (SCI), Physics.
    Cederkall, J.
    Cederwall, Bo
    KTH, Superseded Departments (pre-2005), Physics.
    Johnson, Arne
    KTH, Superseded Departments (pre-2005), Physics.
    Kerek, Andras
    KTH, Superseded Departments (pre-2005), Physics.
    Klamra, Wlodzimierz
    KTH, Superseded Departments (pre-2005), Physics.
    van der Marel, J.
    Molnar, J.
    Novak, D.
    Sohler, D.
    Steen, M.
    Uhlen, P.
    A TOF-PET system for educational purposes2002In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 477, no 03-jan, p. 82-87Article in journal (Refereed)
    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.

  • 38.
    Bäck, Torbjörn
    et al.
    KTH, Superseded Departments (pre-2005), Physics.
    Cederkäll, Joakim
    KTH, Superseded Departments (pre-2005), Physics.
    Cederwall, Bo
    KTH, Superseded Departments (pre-2005), Physics.
    Johnson, Arne
    KTH, Superseded Departments (pre-2005), Physics.
    Kerek, Andras
    KTH, Superseded Departments (pre-2005), Physics.
    Klamra, Wlodzimierz
    van der Marel, J
    Molnar, J
    Novak, D
    Sohler, D
    Steen, M
    Uhlen, P
    An educational tool for demonstrating the TOF-PET technique2001In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 471, no 1-2, p. 200-204Article in journal (Refereed)
    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.

  • 39.
    Bäck, Torbjörn
    et al.
    KTH, Superseded Departments (pre-2005), Physics.
    Cederwall, Bo
    KTH, Superseded Departments (pre-2005), Physics.
    Lagergren, Karin
    KTH, Superseded Departments (pre-2005), Physics.
    Wyss, Ramon
    KTH, Superseded Departments (pre-2005), Physics.
    Johnson, Arne
    KTH, Superseded Departments (pre-2005), Physics.
    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-1712003In: European Physical Journal A, ISSN 1434-6001, E-ISSN 1434-601X, Vol. 17, no 1, p. 1-5Article in journal (Refereed)
    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.

  • 40.
    Bäck, Torbjörn
    et al.
    KTH, Superseded Departments (pre-2005), Physics.
    Cederwall, Bo
    KTH, Superseded Departments (pre-2005), Physics.
    Lagergren, Karin
    KTH, Superseded Departments (pre-2005), Physics.
    Wyss, Ramon
    KTH, Superseded Departments (pre-2005), Physics.
    Johnson, Arne
    KTH, Superseded Departments (pre-2005), Physics.
    Karlgren, Daniel
    KTH, Superseded Departments (pre-2005), Physics.
    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-1712003In: European Physical Journal A, ISSN 1434-6001, E-ISSN 1434-601X, Vol. 16, no 4, p. 489-494Article in journal (Refereed)
    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.

  • 41.
    Bäck, Torbjörn
    et al.
    KTH, Superseded Departments (pre-2005), Physics.
    Cederwall, Bo
    KTH, Superseded Departments (pre-2005), Physics.
    Wyss, Ramon
    KTH, Superseded Departments (pre-2005), Physics.
    Johnson, Arne
    KTH, Superseded Departments (pre-2005), Physics.
    Cederkäll, Joakim
    KTH, Superseded Departments (pre-2005), Physics.
    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-881999In: European Physical Journal A, ISSN 1434-6001, E-ISSN 1434-601X, Vol. 6, no 4, p. 391-397Article in journal (Refereed)
    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.

  • 42.
    Bäck, Torbjörn
    et al.
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Qi, Chong
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Liotta, Roberto
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Ghazi Moradi, Farnaz
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Johnson, Arne
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Wyss, Ramon
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Wadsworth, R.
    Transition probabilities near Sn-100 and the stability of the N, Z=50 shell closure2013In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 87, no 3, p. 031306-Article in journal (Refereed)
    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.

  • 43.
    Bäck, Torbjörn
    et al.
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Qi, Chong
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Liotta, Roberto
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Moradi, Farnaz Ghazi
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Johnson, Arne
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Wyss, Ramon
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    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 technique2012In: Physica Scripta, ISSN 0031-8949, E-ISSN 1402-4896, Vol. T150, p. 014003-Article in journal (Refereed)
    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.

  • 44.
    Bäck, Torbjörn
    et al.
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Qi, Chong
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Ghazi Moradi, Farnaz
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Johnson, Arne
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Liotta, Roberto
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Wyss, Ramon
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    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)Te2011In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 84, no 4, p. 041306-Article in journal (Refereed)
    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.

  • 45. Caceres, L.
    et al.
    Gorska, M.
    Jungclaus, A.
    Pfutzner, M.
    Grawe, H.
    Nowacki, F.
    Sieja, K.
    Pietri, S.
    Rudolph, D.
    Podolyak, Zs.
    Regan, P. H.
    Werner-Malento, E.
    Detistov, P.
    Lalkovski, S.
    Modamio, V.
    Walker, J.
    Andgren, Karin
    KTH, School of Engineering Sciences (SCI), Physics.
    Bednarczyk, P.
    Benlliure, J.
    Benzoni, G.
    Bruce, A. M.
    Casarejos, E.
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Crespi, F. C. L.
    Doornenbal, P.
    Geissel, H.
    Gerl, J.
    Grebosz, J.
    Hadinia, Bahrak
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Hellstrom, M.
    Hoischen, R.
    Ilie, G.
    Khaplanov, Anton
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Kmiecik, M.
    Kojouharov, I.
    Kumar, R.
    Kurz, N.
    Maj, A.
    Mandal, S.
    Montes, F.
    Martinez-Pinedo, G.
    Myalski, S.
    Prokopowicz, W.
    Schaffner, H.
    Simpson, G. S.
    Steer, S. J.
    Tashenov, S.
    Wieland, O.
    Wollersheim, H. J.
    Spherical proton-neutron structure of isomeric states in Cd-1282009In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 79, no 1, p. 011301-Article in journal (Refereed)
    Abstract [en]

    The gamma-ray decay of isomeric states in the even-even nucleus Cd-128 has been observed. The nucleus of interest was produced both by the fragmentation of Xe-136 and the fission of U-238 primary beams. The level scheme was unambiguously constructed based on.. coincidence relations in conjunction with detailed lifetime analysis employed for the first time on this nucleus. Large-scale shell-model calculations, without consideration of excitations across the N = 82 shell closure, were performed and provide a consistent description of the experimental level scheme. The structure of the isomeric states and their decays exhibit coexistence of proton, neutron, and strongly mixed configurations due to p. interaction in overlapping orbitals for both proton and neutron holes.

  • 46. CARPENTER, MP
    et al.
    JANSSENS, RVF
    Cederwall, Bo
    CROWELL, B
    AHMAD, I
    BECKER, JA
    BRINKMAN, MJ
    DELEPLANQUE, MA
    DIAMOND, RM
    FALLON, P
    FARRIS, LP
    GARG, U
    GASSMANN, D
    HENRY, EA
    HENRY, RG
    HUGHES, JR
    KHOO, TL
    LAURITSEN, T
    LEE, IY
    MACHIAVELLI, AO
    MOORE, EF
    NISIUS, D
    STEPHENS, FS
    IDENTIFICATION OF THE UNFAVORED N=7 SUPERDEFORMED BAND IN HG-1911995In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 51, no 5, p. 2400-2405Article in journal (Refereed)
  • 47. Carroll, R. J.
    et al.
    Andgren, Karin
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Cederwal, Bo
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Doncel, Maria
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Hadinia, Baharak
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics. Department of Physics, University of Guelph, Guelph, ON, Canada.
    Jakobsson, Ulrika
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics. University of Jyväskylä, Department of Physics, Jyväskylä, Finland.
    Sandzelius, Mikael
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Taylor, M. J.
    Thornthwaite, A.
    et al.,
    Excited states in the proton-unbound nuclide Ta-1582016In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 93, no 3, article id 034307Article in journal (Refereed)
    Abstract [en]

    Excited states in the neutron-deficient odd-odd proton-unbound nuclide Ta-158 have been investigated in two separate experiments. In the first experiment, Ir-166 nuclei were produced in the reactions of 380 MeV Kr-78 ions with an isotopically enriched Mo-92 target. The alpha-decay chain of the 9(+) state in Ir-166 was analyzed. Fine structure in the a decay of the 9(+) state in Re-162 established a 66 keV difference in excitation energy between the lowest-lying 9(+) and 10(+) states in Ta-158. Higher-lying states in Ta-158 were populated in the reactions of 255 MeV Ni-58 ions with an isotopically enriched Pd-102 target. Gamma-ray decay paths that populate, depopulate, and bypass a 19(-) isomeric state have been identified. The general features of the deduced level scheme are discussed and the prospects for observing proton emission branches from excited states are considered.

  • 48. Carroll, R. J.
    et al.
    Hadinia, Baharak
    KTH, School of Engineering Sciences (SCI), Physics.
    Qi, Chong
    KTH, School of Engineering Sciences (SCI), Physics.
    Joss, D. T.
    Page, R. D.
    Uusitalo, J.
    Andgren, K.
    KTH, School of Engineering Sciences (SCI), Physics.
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics.
    Darby, I. G.
    Eeckhaudt, S.
    Grahn, T.
    Gray-Jones, C.
    Greenlees, P. T.
    Jones, P. M.
    Julin, R.
    Juutinen, S.
    Leino, M.
    Leppanen, A. -P
    Nyman, M.
    Pakarinen, J.
    Rahkila, P.
    Sandzelius, Mikael
    KTH, School of Engineering Sciences (SCI), Physics.
    Saren, J.
    Scholey, C.
    Seweryniak, D.
    Simpson, J.
    Multiparticle configurations of excited states in Lu-1552016In: PHYSICAL REVIEW C, ISSN 2469-9985, Vol. 94, no 6, article id 064311Article in journal (Refereed)
    Abstract [en]

    Excited states in the neutron-deficient N = 84 nuclide Lu-155 have been populated by using the Pd-102(Ni-58, alpha p) reaction. The Lu-155 nuclei were separated by using the gas-filled recoil ion transport unit (RITU) separator and implanted into the Si detectors of the gamma recoil electron alpha tagging (GREAT) spectrometer. Prompt gamma-ray emissions measured at the target position using the JUROGAM Ge detector array were assigned to Lu-155 through correlations with alpha decays measured in GREAT. Structures feeding the (11/2(-)) and (25/2(-)) alpha-decaying states have been revised and extended. Shell-model calculations have been performed and are found to reproduce the excitation energies of several of the low-lying states observed to within an average of 71 keV. In particular, the seniority inversion of the 25/2(-) and 27/2(-) states is reproduced.

  • 49. Carroll, R. J.
    et al.
    Page, R. D.
    Joss, D. T.
    Uusitalo, J.
    Darby, I. G.
    Andgren, Karin
    KTH, School of Engineering Sciences (SCI), Physics.
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics.
    Eeckhaudt, S.
    Grahn, T.
    Gray-Jones, C.
    Greenlees, P. T.
    Hadinia, Baharak
    KTH, School of Engineering Sciences (SCI), Physics.
    Jones, P. M.
    Julin, R.
    Juutinen, S.
    Leino, M.
    Leppänen, A. -P
    Nyman, M.
    O'Donnell, D.
    Pakarinen, J.
    Rahkila, P.
    Sandzelius, M.
    Saren, J.
    Scholey, C.
    Seweryniak, D.
    Simpson, J.
    Blurring the Boundaries: Decays of Multiparticle Isomers at the Proton Drip Line2014In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 112, no 9, p. 092501-Article in journal (Refereed)
    Abstract [en]

    A multiparticle spin-trap isomer has been discovered in the proton-unbound nucleus 158 73 Ta 85. The isomer mainly decays by (h) over bar -ray emission with a half-life of 6.1d(1) mu s. Analysis of the gamma-ray data shows that the isomer lies 2668 keV above the known 9(+) state and has a spin 10h higher and negative parity. This 19(-) isomer also has an 8644(11) keV, 1.4(2)% alpha-decay branch that populates the 9(+) state in Lu-154. No proton-decay branch from the isomer was identified, despite the isomer being unbound to proton emission by 3261(14) keV. This remarkable stability against proton emission is compared with theoretical predictions, and the implications for the extent of observable nuclides are considered.

  • 50. Carroll, R. J.
    et al.
    Page, R. D.
    Joss, D. T.
    Uusitalo, J.
    Darby, I. G.
    Andgren, Karin
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Eeckhaudt, S.
    Grahn, T.
    Gray-Jones, C.
    Greenlees, P. T.
    Hadinia, Baharak
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Jones, P. M.
    Julin, R.
    Juutinen, S.
    Leino, M.
    Leppänen, A. -P
    Nyman, M.
    O'Donnell, D.
    Pakarinen, J.
    Rahkila, P.
    Sandzelius, M.
    Sarén, J.
    Scholey, C.
    Seweryniak, D.
    Simpson, J.
    Competing decay modes of a high-spin isomer in the proton-unbound nucleus 158Ta2015In: Acta Physica Polonica B, ISSN 0587-4254, E-ISSN 1509-5770, Vol. 46, no 3, p. 695-698Article in journal (Refereed)
    Abstract [en]

    An isomeric state at high spin and excitation energy was recently observed in the proton-unbound nucleus 158Ta. This state was observed to decay by both α and γ decay modes. The large spin change required to decay via γ-ray emission incurs a lifetime long enough for α decay to compete. The α decay has an energy of 8644(11) keV, which is among the highest observed in the region, a partial half-life of 440(70) μs and changes the spin by 11h. In this paper, additional evidence supporting the assignment of this α decay to the high-spin isomer in 158Ta will be presented.

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