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  • 1. Aaboud, M.
    et al.
    Jensen, Bengt
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Ohm, Christian
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Ripellino, Giulia
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Sidebo, P. Edvin
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Strandberg, Jonas
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Zwalinski, L.
    CERN, Geneva, Switzerland..
    Dijet azimuthal correlations and conditional yields in pp and p plus Pb collisions ats root S-NN=5.02 TeV with the ATLAS detector2019In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 100, no 3, article id 034903Article in journal (Refereed)
    Abstract [en]

    This paper presents a measurement of forward-forward and forward-central dijet azimuthal angular correlations and conditional yields in proton-proton (pp) and proton-lead (p + Pb) collisions as a probe of the nuclear gluon density in regions where the fraction of the average momentum per nucleon carried by the parton entering the hard scattering is low. In these regions, gluon saturation can modify the rapidly increasing parton distribution function of the gluon. The analysis utilizes 25 pb(-1) of pp data and 360 mu b(-1) of p + Pb data, both at root S-NN = 5.02 TeV, collected in 2015 and 2016, respectively, with the ATLAS detector at the Large Hadron Collider. The measurement is performed in the center-of-mass frame of the nucleon-nucleon system in the rapidity range between -4.0 and 4.0 using the two highest transverse-momentum jets in each event, with the highest transverse-momentum jet restricted to the forward rapidity range. No significant broadening of azimuthal angular correlations is observed for forward-forward or forward-central dijets in p + Pb compared to pp collisions. For forward-forward jet pairs in the proton-going direction, the ratio of conditional yields in p + Pb collisions to those in pp collisions is suppressed by approximately 20%, with no significant dependence on the transverse momentum of the dijet system. No modification of conditional yields is observed for forward-central dijets.

  • 2. Aaboud, M.
    et al.
    Kastanas, Konstatinos A.
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Lund-Jensen, Bengt
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Ohm, Christian
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Ripellino, Giulia
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Sidebo, P. Edvin
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Strandberg, Jonas
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Zwalinski, L.
    et al.,
    Measurement of jet fragmentation in Pb plus Pb and pp collisions at root S-NN=5.02 TeV with the ATLAS detector2018In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 98, no 2, article id 024908Article in journal (Refereed)
    Abstract [en]

    This paper presents a measurement of jet fragmentation functions in 0.49 nb(-1) of Pb +Pb collisions and 25 pb(-1) of pp collisions at root S-NN = 5.02 TeV collected in 2015 with the ATLAS detector at the LHC. These measurements provide insight into the jet quenching process in the quark-gluon plasma created in the aftermath of ultrarelativistic collisions between two nuclei. The modifications to the jet fragmentation functions are quantified by dividing the measurements in Pb+Pb collisions by baseline measurements in pp collisions. This ratio is studied as a function of the transverse momentum of the jet, the jet rapidity, and the centrality of the collision. In both collision systems, the jet fragmentation functions are measured for jets with transverse momentum between 126 and 398 GeV and with an absolute value of jet rapidity less than 2.1. An enhancement of particles carrying a small fraction of the jet momentum is observed, which increases with centrality and with increasing jet transverse momentum. Yields of particles carrying a very large fraction of the jet momentum are also observed to be enhanced. Between these two enhancements of the fragmentation functions a suppression of particles carrying an intermediate fraction of the jet momentum is observed in Pb+Pb collisions. A small dependence of the modifications on jet rapidity is observed.

  • 3. Aaboud, M.
    et al.
    Lund-Jensen, Bengt
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Sidebo, P. Edvin
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Strandberg, Jonas
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Zwalinski, L.
    et al.,
    Femtoscopy with identified charged pions in proton-lead collisions at root s(NN)=5.02 TeV with ATLAS2017In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 96, no 6Article in journal (Refereed)
    Abstract [en]

    Bose-Einstein correlations between identified charged pions are measured for p+Pb collisions at root s(NN) = 5.02 TeV using data recorded by the ATLAS detector at the CERN Large Hadron Collider corresponding to a total integrated luminosity of 28 nb(-1). Pions are identified using ionization energy loss measured in the pixel detector. Two-particle correlation functions and the extracted source radii are presented as a function of collision centrality as well as the average transverse momentum (k(T)) and rapidity (y*(pi pi)) of the pair. Pairs are selected with a rapidity -2 < y*(pi pi) < 1 and with an average transverse momentum 0.1 < k(T) < 0.8 GeV. The effect of jet fragmentation on the two-particle correlation function is studied, and a method using opposite-charge pair data to constrain its contributions to the measured correlations is described. The measured source sizes are substantially larger in more central collisions and are observed to decrease with increasing pair k(T). A correlation of the radii with the local charged-particle density is demonstrated. The scaling of the extracted radii with the mean number of participating nucleons is also used to compare a selection of initial-geometry models. The cross term R-ol is measured as a function of rapidity, and a nonzero value is observed with 5.1 sigma combined significance for -1 < y*pi pi < 1 in the most central events.

  • 4. Auranen, K.
    et al.
    Uusitalo, J.
    Juutinen, S.
    Badran, H.
    Bisso, F. Defranchi
    Cox, D.
    Grahn, T.
    Greenlees, P. T.
    Herzan, A.
    Jakobsson, Ulrika
    KTH, School of Engineering Sciences (SCI), Physics. University of Helsinki, Finland.
    Julin, R.
    Konki, J.
    Leino, M.
    Lightfoot, A.
    Mallaburn, M. J.
    Neuvonen, O.
    Pakarinen, J.
    Papadakis, P.
    Partanen, J.
    Rahkila, P.
    Sandzelius, M.
    Saren, J.
    Scholey, C.
    Sorri, J.
    Stolze, S.
    Wang, Y. K.
    Prompt and delayed spectroscopy of At-203: Observation of a shears band and a 29/2(+) isomeric state2018In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 97, no 2, article id 024301Article in journal (Refereed)
    Abstract [en]

    Using fusion-evaporation reactions, a gas-filled recoil separator, recoil-gating technique and recoil-isomer decay tagging technique we have extended the level scheme of At-203 (N = 118) significantly. We have observed an isomeric [tau = 14.1(3) mu s] state with a spin and parity of 29/2(+). The isomeric state is suggested to originate from the pi(h(9/2)) circle times |Po-202; 11(-)> coupling, and it is depopulated through 286 keV E2 and 366 keV E3 transitions. In addition, we have observed a cascade of magnetic-dipole transitions which is suggested to be generated by the shears mechanism.

  • 5. Auranen, K.
    et al.
    Uusitalo, J.
    Juutinen, S.
    Badran, H.
    Bisso, F. Defranchi
    Cox, D.
    Grahn, T.
    Greenlees, P. T.
    Herzan, A.
    Jakobsson, Ulrika
    KTH, School of Engineering Sciences (SCI), Physics.
    Julin, R.
    Konki, J.
    Leino, M.
    Lightfoot, A.
    Mallaburn, M.
    Neuvonen, O.
    Pakarinen, J.
    Papadakis, P.
    Partanen, J.
    Rahkila, P.
    Sandzelius, M.
    Saren, J.
    Scholey, C.
    Sorri, J.
    Stolze, S.
    Experimental study of isomeric intruder 1/2(+) states in At-197,At-2032017In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 95, no 4, article id 044311Article in journal (Refereed)
    Abstract [en]

    A newly observed isomeric intruder 1/2(+) state [T-1/2 = 3.5( 6) ms] is identified in At-203 using a gas-filled recoil separator and fusion-evaporation reactions. The isomer is depopulated through a cascade of E3 and mixed M1/E2 transitions to the 9/2(-) ground state, and it is suggested to originate from the pi(s(1/2))(-1) configuration. In addition, the structures above the 1/2(+) state in At-203 and At-197 are studied using in-beam gamma-ray spectroscopy, recoil-decay tagging, and recoil-isomer decay tagging methods. The 1/2(+) state is fed from 3/2(+) and 5/2(+) states, and the origin of these states are discussed.

  • 6. Badran, H.
    et al.
    Scholey, C.
    Uusitalo, J.
    Auranen, K.
    Grahn, T.
    Greenlees, P. T.
    Herzan, A.
    Jakobsson, Ulrika
    KTH, School of Engineering Sciences (SCI), Physics.
    Julin, R.
    Juutinen, S.
    Konki, J.
    Leino, M.
    Mallaburn, M. J.
    Pakarinen, J.
    Papadakis, P.
    Partanen, J.
    Peura, P.
    Rahkila, P.
    Sandzelius, M.
    Saren, J.
    Sorri, J.
    Stolze, S.
    Decay spectroscopy of Pb-179(82)97 and evidence for a 9/2(-) intruder state in Tl-179(81)982017In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 96, no 6, article id 064314Article in journal (Refereed)
    Abstract [en]

    The very neutron-deficient isobars Pb-179 and Tl-179 have been produced using the fusion-evaporation reactions Pd-104(Kr-78,xpyn), where x <= 1 and y >= 2. The gas-filled separator RITU was employed to transport and separate the recoiling nuclei of interest from the scattered beam and unwanted products. The GREAT spectrometer was used to study the decay properties through alpha-alpha and alpha-gamma correlations, which has allowed the ground state of Pb-179 to be assigned as I-pi = 9/2(-). The decay of Pb-179 was measured to have an alpha-particle energy and half-life of E-alpha = 7348(5) keV and t(1/2) = 2.7(2) ms, respectively. A search for a nu i(13/2) state in Pb-179 was performed, but only a limit of excitation energy and half-life was obtained. In Tl-179 a t(1/2) = 114(-10)(+18) ns isomeric state, likely at an excitation energy of 904.5(9) keV, was identified and is tentatively assigned to be a 9/2(-) proton intruder state.

  • 7.
    Bhagwat, Ameeya
    et al.
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics. UM-DAE Centre for Excellence in Basic Sciences, India.
    Liotta, Roberto
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Cluster decay in the superallowed alpha decay region2017In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 96, no 3, article id 031302Article in journal (Refereed)
    Abstract [en]

    The emissions of a particles and protons are the dominant decay channels in the neutron-deficient nuclei corresponding to the sdg major shell. The possibility of cluster emission is explored here. It is shown that the cluster decay mode has a small yet sizable branching ratio.

  • 8.
    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.

  • 9. Cui, J. P.
    et al.
    Zhang, Y. L.
    Zhang, S.
    Wang, Y. Z.
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    alpha-decay half-lives of superheavy nuclei2018In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 97, no 1, article id 014316Article in journal (Refereed)
    Abstract [en]

    The alpha-decay half-lives of superheavy nuclei (SHN) with Z >= 104 are investigated by employing the effective liquid drop model (ELDM). By comparison between the calculated half-lives and the experimental ones, it is shown that the ELDM is a successful model to reproduce the experimental half-lives of SHN. Within the ELDM the alpha-decay half-lives of Z = 118-120 isotopes are predicted by inputting the alpha-decay energy (Q(alpha)) values extracted from the newest Weizsacker-Skyrme-4 (WS4) model, the finite-range droplet model (FRDM), the Kourra-Tachibaba-Uno-Yamada (KTUY) formula, and the Hartree-Fock-Bogoliubovmean field with the D1S Gogny force (GHFB). It is found that the shell effects at N = 178 and 184 are evident by analyzing the Q(alpha) values and half-lives versus the neutron number N. Because the WS4 Q(alpha) values have the smallest rms deviation, the predicted alpha-decay half-lives could be more accurate than the ones of other models, which will be helpful for future experiments.

  • 10.
    Davies, P. J.
    et al.
    Univ York, York YO10 5DD, N Yorkshire, England..
    Bäck, Torbjörn
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Zhu, Y.
    Tokyo Univ Sci, Noda, Chiba 2788510, Japan..
    Toward the limit of nuclear binding on the N = Z line: Spectroscopy of Cd-962019In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 99, no 2, article id 021302Article in journal (Refereed)
    Abstract [en]

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

  • 11.
    Doncel, Maria
    et al.
    KTH, School of Engineering Sciences (SCI), Physics.
    Bäck, Torbjörn
    KTH, School of Engineering Sciences (SCI), Physics.
    Qi, C.
    Cullen, D. M.
    Hodge, D.
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics.
    Taylor, M. J.
    Procter, M.
    Giles, M.
    Auranen, K.
    Grahn, T.
    Greenlees, P. T.
    Jakobsson, U.
    Julin, R.
    Juutinen, S.
    Herzáň, A.
    Konki, J.
    Pakarinen, J.
    Partanen, J.
    Peura, P.
    Rahkila, P.
    Ruotsalainen, P.
    Sandzelius, M.
    Sarén, J.
    Scholey, C.
    Sorri, J.
    Stolze, S.
    Uusitalo, J.
    Spin-dependent evolution of collectivity in Te 1122017In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 96, no 5, article id 051304Article in journal (Refereed)
    Abstract [en]

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

  • 12.
    Doncel, Maria
    et al.
    KTH, School of Engineering Sciences (SCI), Physics.
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics.
    Qi, Chong
    KTH, School of Engineering Sciences (SCI), Physics.
    Li, Hongjie J.
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Jakobsson, Ulrika
    KTH, School of Engineering Sciences (SCI), Physics.
    Auranen, K.
    Boenig, S.
    Drummond, M. C.
    Grahn, T.
    Greenlees, P. T.
    Herzan, A.
    Joss, D. T.
    Julin, R.
    Juutinen, S.
    Konki, J.
    Kroell, T.
    Leino, M.
    McPeake, C.
    O'Donnell, D.
    Page, R. D.
    Pakarinen, J.
    Partanen, J.
    Peura, P.
    Rahkila, P.
    Ruotsalainen, P.
    Sandzelius, M.
    Saren, J.
    Saygi, B.
    Scholey, C.
    Sorri, J.
    Stolze, S.
    Taylor, M. J.
    Thornthwaite, A.
    Uusitalo, J.
    Lifetime measurements of excited states in W-162 and W-164 and the evolution of collectivity in rare-earth nuclei2017In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 95, no 4, article id 044321Article in journal (Refereed)
    Abstract [en]

    Lifetimes of the first excited 2(+) states in the extremely neutron- deficient W-162 and W-164 nuclei have been measured using the recoil distance Doppler shift technique. Experimental B(E2) data for the isotopic chains of hafnium, tungsten, and osmium, from the midshell region near the beta-stability line towards the N = 82 closed shell and the most neutron-deficient nuclides, are compared with predictions of nuclear deformations and 2(1)(+) -> 0(g.s)(.+) reduced transition strengths from different classes of state-of-the-art theoretical model calculations. The results reveal striking differences and deficiencies in the predictive power of current nuclear structure models.

  • 13.
    Hadynska-Klek, K.
    et al.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland.;Univ Warsaw, Fac Phys, PL-00681 Warsaw, Poland.;Univ Oslo, Dept Phys, N-0316 Oslo, Norway.;INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy.;Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England..
    Napiorkowski, P. J.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Zielinska, M.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland.;Univ Paris Saclay, CEA, Irfu, F-91191 Gif Sur Yvette, France..
    Srebrny, J.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Maj, A.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Azaiez, F.
    Inst Phys Nucl Orsay, F-91400 Orsay, France..
    Dobon, J. J. Valiente
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Kicinska-Habior, M.
    Univ Warsaw, Fac Phys, PL-00681 Warsaw, Poland..
    Nowacki, F.
    Univ Strasbourg, IPHC, CNRS, UMR7178, 23 Rue Loess, F-67037 Strasbourg, France..
    Naidja, H.
    Univ Strasbourg, IPHC, CNRS, UMR7178, 23 Rue Loess, F-67037 Strasbourg, France.;GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany.;Univ Constantine 1, LPMS, Route Ain El Bey, Constantine 25000, Algeria..
    Bounthong, B.
    Univ Strasbourg, IPHC, CNRS, UMR7178, 23 Rue Loess, F-67037 Strasbourg, France..
    Rodriguez, T. R.
    Univ Autonoma Madrid, Dept Fis Teor, Madrid, Spain..
    de Angelis, G.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Abraham, T.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Kumar, G. Anil
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Bazzacco, D.
    INFN Sez Padova, I-35131 Padua, Italy.;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy..
    Bellato, M.
    INFN Sez Padova, I-35131 Padua, Italy..
    Bortolato, D.
    INFN Sez Padova, I-35131 Padua, Italy..
    Bednarczyk, P.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Benzoni, G.
    INFN Sez Milano, I-20133 Milan, Italy..
    Berti, L.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Birkenbach, B.
    Univ Cologne, Inst Kernphys, Zulpicher Str 77, D-50937 Cologne, Germany..
    Bruyneel, B.
    Univ Cologne, Inst Kernphys, Zulpicher Str 77, D-50937 Cologne, Germany..
    Brambilla, S.
    INFN Sez Milano, I-20133 Milan, Italy..
    Camera, F.
    INFN Sez Milano, I-20133 Milan, Italy.;Univ Milan, Dipartimento Fis, I-20133 Milan, Italy..
    Chavas, J.
    Univ Paris Saclay, CEA, Irfu, F-91191 Gif Sur Yvette, France..
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics. Royal Inst Technol, Dept Phys, SE-10691 Stockholm, Sweden..
    Charles, L.
    Univ Strasbourg, IPHC, CNRS, UMR7178, 23 Rue Loess, F-67037 Strasbourg, France..
    Ciemala, M.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Cocconi, P.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Coleman-Smith, P.
    Daresbury Lab, Warrington WA4 4AD, Cheshire, England..
    Colombo, A.
    INFN Sez Padova, I-35131 Padua, Italy..
    Corsi, A.
    INFN Sez Milano, I-20133 Milan, Italy.;Univ Milan, Dipartimento Fis, I-20133 Milan, Italy..
    Crespi, F. C. L.
    INFN Sez Milano, I-20133 Milan, Italy.;Univ Milan, Dipartimento Fis, I-20133 Milan, Italy..
    Cullen, D. M.
    Univ Manchester, Sch Phys & Astron, Schuster Lab, Manchester M13 9PL, Lancs, England..
    Czermak, A.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Desesquelles, P.
    Univ Paris 11, F-91400 Orsay, France.;CNRS, CSNSM, IN2P3, F-91405 Orsay, France..
    Doherty, D. T.
    Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England.;Univ Paris Saclay, CEA, Irfu, F-91191 Gif Sur Yvette, France.;Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England..
    Dulny, B.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Eberth, J.
    Univ Cologne, Inst Kernphys, Zulpicher Str 77, D-50937 Cologne, Germany..
    Farnea, E.
    INFN Sez Padova, I-35131 Padua, Italy.;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy..
    Fornal, B.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Franchoo, S.
    Inst Phys Nucl Orsay, F-91400 Orsay, France..
    Gadea, A.
    Univ Valencia, CSIC, Inst Fis Corpuscular IFIC, S-46980 Valencia, Spain..
    Giaz, A.
    INFN Sez Milano, I-20133 Milan, Italy.;Univ Milan, Dipartimento Fis, I-20133 Milan, Italy..
    Gottardo, A.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Grave, X.
    Inst Phys Nucl Orsay, F-91400 Orsay, France..
    Grebosz, J.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Gorgen, A.
    Univ Oslo, Dept Phys, N-0316 Oslo, Norway..
    Gulmini, M.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Habermann, T.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany..
    Hess, H.
    Univ Cologne, Inst Kernphys, Zulpicher Str 77, D-50937 Cologne, Germany..
    Isocrate, R.
    INFN Sez Padova, I-35131 Padua, Italy.;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy..
    Iwanicki, J.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Jaworski, G.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Judson, D. S.
    Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England..
    Jungclaus, A.
    CSIC, Inst Estruct Mat, E-28006 Madrid, Spain..
    Karkour, N.
    CNRS, CSNSM, IN2P3, F-91405 Orsay, France..
    Kmiecik, M.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Karpinski, D.
    Univ Warsaw, Fac Phys, PL-00681 Warsaw, Poland..
    Kisielinski, M.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Kondratyev, N.
    Flerov Lab Nucl React JINR, RU-141980 Dubna, Russia..
    Korichi, A.
    CNRS, CSNSM, IN2P3, F-91405 Orsay, France..
    Komorowska, M.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland.;Univ Warsaw, Fac Phys, PL-00681 Warsaw, Poland..
    Kowalczyk, M.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Korten, W.
    Univ Paris Saclay, CEA, Irfu, F-91191 Gif Sur Yvette, France..
    Krzysiek, M.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland.;Horia Hulubei Natl Inst Phys & Nucl Engn, ELI NP, Magurele 077125, Romania..
    Lehaut, G.
    Univ Lyon 1, CNRS, IN2P3, IPN Lyon, F-69622 Villeurbanne, France..
    Leoni, S.
    INFN Sez Milano, I-20133 Milan, Italy.;Univ Milan, Dipartimento Fis, I-20133 Milan, Italy..
    Ljungvall, J.
    CNRS, CSNSM, IN2P3, F-91405 Orsay, France..
    Lopez-Martens, A.
    CNRS, CSNSM, IN2P3, F-91405 Orsay, France..
    Lunardi, S.
    INFN Sez Padova, I-35131 Padua, Italy.;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy..
    Maron, G.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Mazurek, K.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Menegazzo, R.
    INFN Sez Padova, I-35131 Padua, Italy.;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy..
    Mengoni, D.
    INFN Sez Padova, I-35131 Padua, Italy..
    Merchan, E.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany.;Tech Univ Darmstadt, D-64289 Darmstadt, Germany..
    Meczynski, W.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Michelagnoli, C.
    INFN Sez Padova, I-35131 Padua, Italy.;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy..
    Million, B.
    INFN Sez Milano, I-20133 Milan, Italy..
    Myalski, S.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Napoli, D. R.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Niikura, M.
    Inst Phys Nucl Orsay, F-91400 Orsay, France..
    Obertelli, A.
    Univ Paris Saclay, CEA, Irfu, F-91191 Gif Sur Yvette, France..
    Ozmen, S. F.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Palacz, M.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Prochniak, L.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Pullia, A.
    INFN Sez Milano, I-20133 Milan, Italy.;Univ Milan, Dipartimento Fis, I-20133 Milan, Italy..
    Quintana, B.
    Univ Salamanca, Dept Fis Fundamental, Lab Radiac Ionizantes, Salamanca, Spain..
    Rampazzo, G.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Recchia, F.
    INFN Sez Padova, I-35131 Padua, Italy.;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy..
    Redon, N.
    Univ Lyon 1, CNRS, IN2P3, IPN Lyon, F-69622 Villeurbanne, France..
    Reiter, P.
    Univ Cologne, Inst Kernphys, Zulpicher Str 77, D-50937 Cologne, Germany..
    Rosso, D.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Rusek, K.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Sahin, E.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Salsac, M-D
    Soderstrom, P-A
    Stefan, I.
    Inst Phys Nucl Orsay, F-91400 Orsay, France..
    Stezowski, O.
    Univ Lyon 1, CNRS, IN2P3, IPN Lyon, F-69622 Villeurbanne, France..
    Styczen, J.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Theisen, Ch.
    Univ Paris Saclay, CEA, Irfu, F-91191 Gif Sur Yvette, France..
    Toniolo, N.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Ur, C. A.
    INFN Sez Padova, I-35131 Padua, Italy.;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy..
    Wadsworth, R.
    Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England..
    Wasilewska, B.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Wiens, A.
    Univ Cologne, Inst Kernphys, Zulpicher Str 77, D-50937 Cologne, Germany..
    Wood, J. L.
    Georgia Inst Technol, Sch Phys, Atlanta, GA 30332 USA..
    Wrzosek-Lipska, K.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Zieblinski, M.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Quadrupole collectivity in Ca-42 from low-energy Coulomb excitation with AGATA2018In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 97, no 2, article id 024326Article in journal (Refereed)
    Abstract [en]

    ACoulomb-excitation experiment to study electromagnetic properties of Ca-42 was performed using a 170-MeV calcium beam from the TANDEM XPU facility at INFN Laboratori Nazionali di Legnaro. gamma rays from excited states in Ca-42 were measured with the AGATA spectrometer. The magnitudes and relative signs of ten E2 matrix elements coupling six low-lying states in Ca-42, including the diagonal E2 matrix elements of 2(1)(+) and 2(2)(+) states, were determined using the least-squares code GOSIA. The obtained set of reduced E2 matrix elements was analyzed using the quadrupole sum rule method and yielded overall quadrupole deformation for 0(1),(+)(2) and 2(1,2)(+) states, as well as triaxiality for 0(1,2)(+) states, establishing the coexistence of a weakly deformed ground-state band and highly deformed slightly triaxial sideband in Ca-42. The experimental results were compared with the state-of-the-art large-scale shell-model and beyond-mean-field calculations, which reproduce well the general picture of shape coexistence in Ca-42.

  • 14. Herzan, A.
    et al.
    Juutinen, S.
    Auranen, K.
    Grahn, T.
    Greenlees, P. T.
    Hauschild, K.
    Jakobsson, Ulrika
    KTH, School of Engineering Sciences (SCI), Physics. University of Jyväskylä, Finland.
    Julin, R.
    Ketelhut, S.
    Leino, M.
    Lopez-Martens, A.
    Lonnroth, T.
    Nieminen, P.
    Nyman, M.
    Partanen, J.
    Peura, P.
    Rahkila, P.
    Ruotsalainen, P.
    Sandzelius, M.
    Saren, J.
    Scholey, C.
    Slotte, J. M. K.
    Sorri, J.
    Stolze, S.
    Uusitalo, J.
    Detailed spectroscopy of Bi-1952017In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 96, no 1, article id 014301Article in journal (Refereed)
    Abstract [en]

    An experiment focused on the study of shape coexistence and new high-spin structures in Bi-195 has been performed. The nucleus is in a transitional region of the bismuth isotope chain. A large number of new states have been found, resulting in a significant extension of the previously known level scheme. Several new collective structures have been identified. A strongly coupled rotational band built upon the 13/2(+) isomeric state was extended up to I-pi = (49/2(+)) and an energy of 5706 keV. The I-pi = 31/2(+) member of the pi i(13/2) band was also found to feed a new long-lived isomeric state with an excitation energy of 2616 keV and a spin and parity of I-pi = 29/2(+). The half-life of the 29/2+ isomeric state was determined to be 1.49(1) mu s. It decays via the emission of 457-keV E2 and 236-keV E1 transitions, respectively. A low-energy 46-keV E2 transition has been identified to depopulate the (29/(2-)) isomeric state, with a measured half-life of T-1/2 = 614(5) ns. This transition allows the excitation energy of the isomeric state to be determined as 2381 keV. The feeding patterns of both 29/2(+) and (29/2(-)) isomeric states have also been described. This is the first time collective structures have also been observed up to high spins and excitation energies in the neutron-deficient Bi-195 nucleus. Evidence for the manifestation of shape coexistence in Bi-195 is also discussed.

  • 15. Häfner, G.
    et al.
    Moschner, K.
    Blazhev, A.
    Boutachkov, P.
    Davies, P. J.
    Wadsworth, R.
    Ameil, F.
    Baba, H.
    Bäck, Torbjörn
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Dewald, M.
    Doornenbal, P.
    Faestermann, T.
    Gengelbach, A.
    Gerl, J.
    Gernhaüser, R.
    Go, S.
    Górska, M.
    Grawe, H.
    Gregor, E.
    Hotaka, H.
    Isobe, T.
    Jenkins, D. G.
    Jolie, J.
    Jung, H. S.
    Kojouharov, I.
    Kurz, N.
    Lewitowicz, M.
    Lorusso, G.
    Lozeva, R.
    Merchan, E.
    Naqvi, F.
    Nishibata, H.
    Nishimura, D.
    Nishimura, S.
    Pietralla, N.
    Schaffner, H.
    Söderström, P. -A
    Steiger, K.
    Sumikama, T.
    Taprogge, J.
    Thöle, P.
    Watanbe, H.
    Warr, N.
    Werner, V.
    Xu, Z. Y.
    Yagi, A.
    Yoshinaga, K.
    Zhu, Y.
    Properties of γ-decaying isomers in the Sn 100 region populated in fragmentation of a Xe 124 beam2019In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 100, no 2, article id 024302Article in journal (Refereed)
    Abstract [en]

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

  • 16. Kobyakov, D. N.
    et al.
    Pethick, C. J.
    KTH, Centres, Nordic Institute for Theoretical Physics NORDITA.
    Reddy, S.
    Schwenk, A.
    Dispersion and decay of collective modes in neutron star cores2017In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 96, no 2, article id 025805Article in journal (Refereed)
    Abstract [en]

    We calculate the frequencies of collective modes of neutrons, protons, and electrons in the outer core of neutron stars. The neutrons and protons are treated in a hydrodynamic approximation and the electrons are regarded as collisionless. The coupling of the nucleons to the electrons leads to Landau damping of the collective modes and to significant dispersion of the low-lying modes. We investigate the sensitivity of the mode frequencies to the strength of entrainment between neutrons and protons, which is not well characterized. The contribution of collective modes to the thermal conductivity is evaluated.

  • 17.
    Lewis, M. C.
    et al.
    Univ Liverpool, Dept Phys, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England..
    Parr, E.
    Univ Liverpool, Dept Phys, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England..
    Page, R. D.
    Univ Liverpool, Dept Phys, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England..
    McPeake, C.
    Univ Liverpool, Dept Phys, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England..
    Joss, D. T.
    Univ Liverpool, Dept Phys, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England..
    Ali, F. A.
    Univ Liverpool, Dept Phys, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England.;Univ Sulaimani, Coll Educ, Dept Phys, POB 334, Sulaimani, Kurdistan Regio, Iraq.;Univ Guelph, Dept Phys, Guelph, ON N1G 2W1, Canada..
    Auranen, K.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland.;Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA..
    Briscoe, A. D.
    Univ Liverpool, Dept Phys, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England..
    Capponi, L.
    Univ West Scotland, Sch Engn & Comp, Paisley PA1 2BE, Renfrew, Scotland..
    Grahn, T.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland..
    Greenlees, P. T.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland..
    Henderson, J.
    Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England.;Lawrence Livermore Natl Lab, 7000 East Ave, Livermore, CA 94550 USA..
    Herzan, A.
    Univ Liverpool, Dept Phys, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England.;Slovak Acad Sci, Inst Phys, SK-84511 Bratislava, Slovakia..
    Jakobsson, U.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland.
    Julin, R.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland..
    Juutinen, S.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland..
    Konki, J.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland.;CERN, CH-1211 Geneva 23, Switzerland..
    Labiche, M.
    STFC Daresbury Lab, Warrington WA4 4AD, Cheshire, England..
    Leino, M.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland..
    Mason, P. J. R.
    STFC Daresbury Lab, Warrington WA4 4AD, Cheshire, England..
    Nyman, M.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland.;IRMM, Retieseweg 111, B-2440 Geel, Belgium..
    O'Donnell, D.
    Univ West Scotland, Sch Engn & Comp, Paisley PA1 2BE, Renfrew, Scotland..
    Pakarinen, J.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland..
    Papadakis, P.
    Univ Liverpool, Dept Phys, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England.;Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland..
    Partanen, J.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland..
    Peura, P.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland.;Univ Helsinki, Helsinki Inst Phys, FI-00014 Helsinki, Finland..
    Rahkila, P.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland..
    Revill, J. P.
    Univ Liverpool, Dept Phys, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England..
    Ruotsalainen, P.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland..
    Sandzelius, M.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland..
    Saren, J.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland..
    Saygi, B.
    Univ Liverpool, Dept Phys, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England.;Ege Univ, Fen Fak, Fizik Bolumu, TR-35100 Izmir, Turkey..
    Scholey, C.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland..
    Simpson, J.
    STFC Daresbury Lab, Warrington WA4 4AD, Cheshire, England..
    Smith, J. F.
    Univ West Scotland, Sch Engn & Comp, Paisley PA1 2BE, Renfrew, Scotland..
    Smolen, M.
    Univ West Scotland, Sch Engn & Comp, Paisley PA1 2BE, Renfrew, Scotland..
    Sorri, J.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland..
    Stolze, S.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland.;Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA..
    Thornthwaite, A.
    Univ Liverpool, Dept Phys, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England..
    Uusitalo, J.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland..
    Decay of a 19(-) isomeric state in Lu-1562018In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 98, no 2, article id 024302Article in journal (Refereed)
    Abstract [en]

    A multiparticle spin-trap isomeric state having a half-life of 179(4) ns and lying 2601 keV above the yrast 10(+) state in Lu-156 has been discovered. The Lu-156 nuclei were produced by bombarding isotopically enriched Cd-106 targets with beams of Ni-58 ions, separated in flight using the gas-filled separator RITU and their decays were measured using the GREAT spectrometer. Analysis of the main decay path that populates yrast states observed previously suggests a spin-parity assignment of 19(-) for the isomeric state, which is consistent with isomeric states identified in the N = 85 isotones. Comparison with other decay paths in Lu-156 indicates that the [pi h(11/)(2)(-1) circle times nu h(9/2)]10(+) state at the bottom of the yrast sequence is likely to be the a-decaying isomeric state, with the [pi h(11/)(2)(-1) circle times nu f(7/2)]9(+) state lying 62 keV above it. The relative ordering of the lowest-lying 9(+) and 10(+) states is inverted in Lu-156 compared with its odd-odd isotones.

  • 18.
    Litzinger, J.
    et al.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany..
    Blazhev, A.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany..
    Dewald, A.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany..
    Didierjean, F.
    Univ Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France..
    Duchene, G.
    Univ Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France..
    Fransen, C.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany..
    Lozeva, R.
    Univ Paris Saclay, CSNSM, CNRS IN2P3, Orsay Campus, FR-91405 Orsay, France..
    Verney, D.
    CNRS IN2P3, Inst Phys Nucl, F-91405 Orsay, France.;Univ Paris 11, F-91405 Orsay, France..
    de Angelis, G.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy..
    Bazzacco, D.
    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.;Univ Padua, I-35131 Padua, Italy..
    Birkenbach, B.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany..
    Bottoni, S.
    Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.;Ist Nazl Fis Nucl, Sez Milano, Via Celoria 16, I-20133 Milan, Italy..
    Bracco, A.
    Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.;Ist Nazl Fis Nucl, Sez Milano, Via Celoria 16, I-20133 Milan, Italy..
    Braunroth, T.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany..
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics.
    Corradi, L.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy..
    Crespi, F. C. L.
    Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.;Ist Nazl Fis Nucl, Sez Milano, Via Celoria 16, I-20133 Milan, Italy..
    Desesquelles, P.
    Ctr Spectrometrie Nucl & Spectrometrie Masse CSNS, CNRS IN2P3, Orsay Campus, F-91405 Orsay, France.;Univ Paris 11, Orsay Campus, F-91405 Orsay, France..
    Eberth, J.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany..
    Ellinger, E.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany..
    Farnea, E.
    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.;Univ Padua, I-35131 Padua, Italy..
    Fioretto, E.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy..
    Gernhaeuser, R.
    Tech Univ Munich, Phys Dept E12, D-85748 Garching, Germany..
    Goasduff, A.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy..
    Gorgen, A.
    Ctr CEA Saclay, Inst Rech Fondamentales Univers IRFU, CEA DSM, F-91191 Gif Sur Yvette, France.;Univ Oslo, Dept Phys, POB 1048 Blindern, N-0316 Oslo, Norway..
    Gottardo, A.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy..
    Grebosz, J.
    Polish Acad Sci, Henry Niewodniczatiski Inst Nucl Phys, Ul Radzikowskiego 152, PL-31342 Krakow, Poland..
    Hackstein, M.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany..
    Hess, H.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany..
    Ibrahim, F.
    CNRS IN2P3, Inst Phys Nucl, F-91405 Orsay, France.;Univ Paris 11, F-91405 Orsay, France..
    Jolie, J.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany..
    Jungclaus, A.
    CSIC, Inst Estruct Mat, Serrano 119, E-28006 Madrid, Spain..
    Kolos, K.
    CNRS IN2P3, Inst Phys Nucl, F-91405 Orsay, France.;Univ Paris 11, F-91405 Orsay, France..
    Korten, W.
    Ctr CEA Saclay, Inst Rech Fondamentales Univers IRFU, CEA DSM, F-91191 Gif Sur Yvette, France..
    Leoni, S.
    Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.;Ist Nazl Fis Nucl, Sez Milano, Via Celoria 16, I-20133 Milan, Italy..
    Lunardi, S.
    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.;Univ Padua, I-35131 Padua, Italy..
    Maj, A.
    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, I-35131 Padua, Italy.;Univ West Scotland, Nucl Phys Res Grp, High St, Paisley PA1 2BE, Renfrew, Scotland..
    Michelagnoli, C.
    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.;GANIL, CEA DSM CNRS IN2P3, BP 55027, F-14076 Caen 5, France..
    Mijatovic, T.
    Ruder Bakovie Inst, HR-10002 Zagreb, Croatia..
    Million, B.
    Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy..
    Moeller, O.
    Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany..
    Modamio, V.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy..
    Montagnoli, G.
    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.;Univ Padua, I-35131 Padua, Italy..
    Montanari, D.
    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.;Univ Padua, I-35131 Padua, Italy..
    Morales, A. I.
    Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.;Ist Nazl Fis Nucl, Sez Milano, Via Celoria 16, I-20133 Milan, Italy..
    Napoli, D. R.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy..
    Niikura, M.
    CNRS IN2P3, Inst Phys Nucl, F-91405 Orsay, France.;Univ Paris 11, F-91405 Orsay, France..
    Pietralla, N.
    Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany..
    Pollarolo, G.
    Univ Turin, Dipartimento Fis Teor, I-10125 Turin, Italy.;Ist Nazl Fis Nucl, I-10125 Turin, Italy..
    Pullia, A.
    Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.;Ist Nazl Fis Nucl, Sez Milano, Via Celoria 16, I-20133 Milan, Italy..
    Quintana, B.
    Univ Salamanca, Lab Radiaciones Ionizantes, E-37008 Salamanca, Spain..
    Recchia, F.
    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.;Univ Padua, I-35131 Padua, Italy..
    Reiter, P.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany..
    Rosso, D.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy..
    Sahin, E.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy..
    Salsac, M. D.
    Ctr CEA Saclay, Inst Rech Fondamentales Univers IRFU, CEA DSM, F-91191 Gif Sur Yvette, France..
    Scarlassara, F.
    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.;Univ Padua, I-35131 Padua, Italy..
    Soderstroem, P. -A
    Stefanini, A. M.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy..
    Stezowski, O.
    Univ Lyon, Univ Lyon 1, IN2P3 CNRS, F-69622 Villeurbanne, France..
    Szilner, S.
    Ruder Bakovie Inst, HR-10002 Zagreb, Croatia..
    Theisen, Ch.
    Ctr CEA Saclay, Inst Rech Fondamentales Univers IRFU, CEA DSM, F-91191 Gif Sur Yvette, France..
    Valiente-Dobon, J. J.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy..
    Vandone, V.
    Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.;Ist Nazl Fis Nucl, Sez Milano, Via Celoria 16, I-20133 Milan, Italy..
    Vogt, A.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany..
    Transition probabilities in neutron-rich Se-80,Se-82 and the role of the nu g(9/2) orbital2018In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 97, no 4, article id 044323Article in journal (Refereed)
    Abstract [en]

    Transition probabilities of intermediate-spin yrast and non-yrast excitations in Se-80,Se-82 were investigated in a recoil distance Doppler-shift (RDDS) experiment performed at the Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro. The Cologne Plunger device for deep inelastic scattering was used for the RDDS technique and was combined with the AGATA Demonstrator array for the gamma-ray detection and coupled to the PRISMA magnetic spectrometer for an event-by-event particle identification. In Se-80, the level lifetimes of the yrast (6(1)(+)) and (8(1)(+)) states and of a non-yrast band feeding the yrast 4(1)(+) state are determined. A spin and parity assignment of the head of this sideband is discussed based on the experimental results and supported by large-scale shell-model calculations. In Se-82, the level lifetimes of the yrast 6(1)(+) state and the yrare 4(2)(+) state and lifetime limits of the yrast (10(1)(+)) state and of the 5(1)(-) state are determined. Although the experimental results contain large uncertainties, they are interpreted with care in terms of large-scale shell-model calculations using the effective interactions JUN45 and jj44b. The excited states' wave functions are investigated and discussed with respect to the role of the neutron g(9/2) orbital.

  • 19. Lv, B. F.
    et al.
    Petrache, C. M.
    Astier, A.
    Dupont, E.
    Lopez-Martens, A.
    Greenlees, P. T.
    Badran, H.
    Calverley, T.
    Cox, D. M.
    Grahn, T.
    Hilton, J.
    Julin, R.
    Juutinen, S.
    Konki, J.
    Leino, M.
    Pakarinen, J.
    Papadakis, P.
    Partanen, J.
    Rahkila, P.
    Sandzelius, M.
    Saren, J.
    Scholey, C.
    Sorri, J.
    Stolze, S.
    Uusitalo, J.
    Herzán, A.
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics.
    Ertoprak, Aysegul
    KTH, School of Engineering Sciences (SCI), Physics.
    Liu, H.
    Guo, S.
    Liu, M. L.
    Qiang, Y. H.
    Wang, J. G.
    Zhou, X. H.
    Kuti, I.
    Timár, J.
    Tucholski, A.
    Srebrny, J.
    Andreoiu, C.
    Evolution from γ -soft to stable triaxiality in Nd 136 as a prerequisite of chirality2018In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 98, no 4, article id 044304Article in journal (Refereed)
    Abstract [en]

    The level structure of Nd136 has been investigated using the Mo100(Ar40,4n) reaction and the JUROGAM II+RITU+GREAT setup. The level scheme has been extended significantly. Many new bands have been identified both at low and high spin, among which are five nearly degenerate bands interpreted as chiral partners. Excitation energies, spins, and parities of the previously known bands are revised and firmly established, and some previously known bands have been revised. Configurations are assigned to the observed bands based on cranked Nilsson-Strutinsky calculations. The band structure of Nd136 is now clarified and the various types of single-particle and collective excitations are well understood.

  • 20.
    Lv, B. F.
    et al.
    Univ Paris Saclay, CNRS, IN2P3, Ctr Sci Nucl & Sci Matiere, Batiment 104-108, F-91405 Orsay, France.;Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China..
    Petrache, C. M.
    Univ Paris Saclay, CNRS, IN2P3, Ctr Sci Nucl & Sci Matiere, Batiment 104-108, F-91405 Orsay, France..
    Chen, Q. B.
    Tech Univ Munich, Phys Dept, D-85747 Garching, Germany..
    Meng, J.
    Peking Univ, Sch Phys, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China.;Kyoto Univ, Yukawa Inst Theoret Phys, Kyoto 6068502, Japan..
    Astier, A.
    Univ Paris Saclay, CNRS, IN2P3, Ctr Sci Nucl & Sci Matiere, Batiment 104-108, F-91405 Orsay, France..
    Dupon, E.
    Univ Paris Saclay, CNRS, IN2P3, Ctr Sci Nucl & Sci Matiere, Batiment 104-108, F-91405 Orsay, France..
    Greenlees, P.
    Univ Jyvaskyla, Dept Phys, FIN-40014 Jyvaskyla, Finland..
    Badran, H.
    Univ Jyvaskyla, Dept Phys, FIN-40014 Jyvaskyla, Finland..
    Calverley, T.
    Univ Jyvaskyla, Dept Phys, FIN-40014 Jyvaskyla, Finland.;Univ Liverpool, Dept Phys, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England..
    Cox, D. M.
    Univ Jyvaskyla, Dept Phys, FIN-40014 Jyvaskyla, Finland.;Lund Inst Technol, Dept Math Phys, S-22362 Lund, Sweden..
    Grahn, T.
    Univ Jyvaskyla, Dept Phys, FIN-40014 Jyvaskyla, Finland..
    Hilton, J.
    Univ Jyvaskyla, Dept Phys, FIN-40014 Jyvaskyla, Finland.;Univ Liverpool, Dept Phys, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England..
    Julin, R.
    Univ Jyvaskyla, Dept Phys, FIN-40014 Jyvaskyla, Finland..
    Juutinen, S.
    Univ Jyvaskyla, Dept Phys, FIN-40014 Jyvaskyla, Finland..
    Konki, J.
    Univ Jyvaskyla, Dept Phys, FIN-40014 Jyvaskyla, Finland.;CERN, CH-1211 Geneva 23, Switzerland..
    Pakarinen, J.
    Univ Jyvaskyla, Dept Phys, FIN-40014 Jyvaskyla, Finland..
    Papadakis, P.
    Univ Jyvaskyla, Dept Phys, FIN-40014 Jyvaskyla, Finland.;Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England..
    Partanen, J.
    Univ Jyvaskyla, Dept Phys, FIN-40014 Jyvaskyla, Finland..
    Rahkila, P.
    Univ Jyvaskyla, Dept Phys, FIN-40014 Jyvaskyla, Finland..
    Ruotsalainen, P.
    Univ Jyvaskyla, Dept Phys, FIN-40014 Jyvaskyla, Finland..
    Sandzelius, M.
    Univ Jyvaskyla, Dept Phys, FIN-40014 Jyvaskyla, Finland..
    Saren, J.
    Univ Jyvaskyla, Dept Phys, FIN-40014 Jyvaskyla, Finland..
    Scholey, C.
    Univ Jyvaskyla, Dept Phys, FIN-40014 Jyvaskyla, Finland..
    Sorri, J.
    Univ Jyvaskyla, Dept Phys, FIN-40014 Jyvaskyla, Finland.;Univ Oulu, Sodankyla Geophys Observ, FIN-99600 Sodankyla, Finland..
    Stolze, S.
    Univ Jyvaskyla, Dept Phys, FIN-40014 Jyvaskyla, Finland.;Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA..
    Uusitalo, J.
    Univ Jyvaskyla, Dept Phys, FIN-40014 Jyvaskyla, Finland..
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics.
    Ertoprak, Aysegul
    KTH, School of Engineering Sciences (SCI), Physics.
    Liu, Haipeng
    KTH, School of Engineering Sciences (SCI), Physics.
    Guo, S.
    Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China..
    Liu, M. L.
    Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China..
    Wang, J. G.
    Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China..
    Zhou, X. H.
    Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China..
    Kuti, I
    Hungarian Acad Sci, Inst Nucl Res, Pf 51, H-4001 Debrecen, Hungary..
    Timar, J.
    Hungarian Acad Sci, Inst Nucl Res, Pf 51, H-4001 Debrecen, Hungary..
    Tucholski, A.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5a, PL-02093 Warsaw, Poland..
    Srebrny, J.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5a, PL-02093 Warsaw, Poland..
    Andreoiu, C.
    Simon Fraser Univ, Dept Chem, Burnaby, BC V5A 1S6, Canada..
    Chirality of Nd-135 reexamined: Evidence for multiple chiral doublet bands2019In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 100, no 2, article id 024314Article in journal (Refereed)
    Abstract [en]

    One new pair of positive-parity chiral doublet bands have been identified in the odd-A nucleus Nd-135 which together with the previously reported negative-parity chiral doublet bands constitute a third case of multiple chiral doublet (M chi D) bands in the A approximate to 130 mass region. The properties of the M chi D bands are well reproduced by constrained covariant density functional theory and particle rotor model calculations. The newly observed M chi D bands in Nd-135 represents an important milestone in supporting the existence of M chi D in nuclei.

  • 21.
    Parr, E.
    et al.
    Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England..
    Page, R. D.
    Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England..
    Joss, D. T.
    Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England..
    Ali, F. A.
    Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England.;Univ Sulaimani, Coll Educ, Dept Phys, POB 334, Sulaimani, Kurdistan Regio, Iraq.;Univ Guelph, Dept Phys, Guelph, ON N1G 2W1, Canada..
    Auranen, K.
    Univ Jyvaskyla, Dept Phys, POB 35, FI-40014 Jyvaskyla, Finland.;Argonne Natl Lab, Phys Div, Argonne, IL 60439 USA..
    Capponi, L.
    Univ West Scotland, Sch Engn & Comp, Paisley PA1 2BE, Renfrew, Scotland.;Scottish Univ Phys Alliance, Glasgow G12 8QQ, Lanark, Scotland.;Horia Hulubei Natl Inst Res Phys & Nucl Engn, ELI NP, Bucharest, Romania..
    Grahn, T.
    Univ Jyvaskyla, Dept Phys, POB 35, FI-40014 Jyvaskyla, Finland..
    Greenlees, P. T.
    Univ Jyvaskyla, Dept Phys, POB 35, FI-40014 Jyvaskyla, Finland..
    Henderson, J.
    Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England.;Lawrence Livermore Natl Lab, 7000 East Ave, Livermore, CA 94550 USA..
    Herzan, A.
    Univ Jyvaskyla, Dept Phys, POB 35, FI-40014 Jyvaskyla, Finland.;Slovak Acad Sci, Inst Phys, SK-84511 Bratislava, Slovakia..
    Jakobsson, Ulrika
    KTH, School of Engineering Sciences (SCI), Physics. Univ Jyvaskyla, Dept Phys, POB 35, FI-40014 Jyvaskyla, Finland.
    Julin, R.
    Univ Jyvaskyla, Dept Phys, POB 35, FI-40014 Jyvaskyla, Finland..
    Juutinen, S.
    Univ Jyvaskyla, Dept Phys, POB 35, FI-40014 Jyvaskyla, Finland..
    Konki, J.
    Univ Jyvaskyla, Dept Phys, POB 35, FI-40014 Jyvaskyla, Finland.;CERN, CH-1211 Geneva 23, Switzerland..
    Labiche, M.
    STFC Daresbury Lab, Nucl Phys Grp, Warrington WA4 4AD, Cheshire, England..
    Leino, M.
    Univ Jyvaskyla, Dept Phys, POB 35, FI-40014 Jyvaskyla, Finland..
    Mason, P. J. R.
    STFC Daresbury Lab, Nucl Phys Grp, Warrington WA4 4AD, Cheshire, England..
    McPeake, C.
    Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England..
    O'Donnell, D.
    Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England.;Univ West Scotland, Sch Engn & Comp, Paisley PA1 2BE, Renfrew, Scotland..
    Pakarinen, J.
    Univ Jyvaskyla, Dept Phys, POB 35, FI-40014 Jyvaskyla, Finland..
    Papadakis, P.
    Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England.;Univ Jyvaskyla, Dept Phys, POB 35, FI-40014 Jyvaskyla, Finland..
    Partanen, J.
    Univ Jyvaskyla, Dept Phys, POB 35, FI-40014 Jyvaskyla, Finland..
    Peura, P.
    Univ Jyvaskyla, Dept Phys, POB 35, FI-40014 Jyvaskyla, Finland..
    Rahkila, P.
    Univ Jyvaskyla, Dept Phys, POB 35, FI-40014 Jyvaskyla, Finland..
    Revill, J. P.
    Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England..
    Ruotsalainen, P.
    Univ Jyvaskyla, Dept Phys, POB 35, FI-40014 Jyvaskyla, Finland..
    Sandzelius, M.
    Univ Jyvaskyla, Dept Phys, POB 35, FI-40014 Jyvaskyla, Finland..
    Saren, J.
    Univ Jyvaskyla, Dept Phys, POB 35, FI-40014 Jyvaskyla, Finland..
    Scholey, C.
    Univ Jyvaskyla, Dept Phys, POB 35, FI-40014 Jyvaskyla, Finland..
    Simpson, J.
    STFC Daresbury Lab, Nucl Phys Grp, Warrington WA4 4AD, Cheshire, England..
    Smith, J. F.
    Univ West Scotland, Sch Engn & Comp, Paisley PA1 2BE, Renfrew, Scotland.;Scottish Univ Phys Alliance, Glasgow G12 8QQ, Lanark, Scotland..
    Smolen, M.
    Univ West Scotland, Sch Engn & Comp, Paisley PA1 2BE, Renfrew, Scotland.;Scottish Univ Phys Alliance, Glasgow G12 8QQ, Lanark, Scotland..
    Sorri, J.
    Univ Jyvaskyla, Dept Phys, POB 35, FI-40014 Jyvaskyla, Finland..
    Stolze, S.
    Univ Jyvaskyla, Dept Phys, POB 35, FI-40014 Jyvaskyla, Finland.;Argonne Natl Lab, Phys Div, Argonne, IL 60439 USA..
    Thornthwaite, A.
    Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England..
    Uusitalo, J.
    Univ Jyvaskyla, Dept Phys, POB 35, FI-40014 Jyvaskyla, Finland..
    Fine structure in the alpha decay of high-spin isomers in Lu-155 and Hf-1562018In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 98, no 2, article id 024321Article in journal (Refereed)
    Abstract [en]

    Fine structure in the a decay of high-spin isomers in Lu-155( 25/2(-)) and Hf-156(8(+))has been studied for the first time using alpha gamma- coincidence analysis. Three new a decays from Lu-155(25/2(-)) and two from Hf-156(8(+)) have been identified, populating seniority s > 1 states in the N = 82 nuclei Tm-151 and Yb-152, respectively. The reduced hindrance factors of the a decays support the previous configuration assignments of the populated states. This is the first observation of states with excitation energy greater than 1.5 MeV being populated following a decay in nuclei outside of the Pb-208 region.

  • 22.
    Petrache, C. M.
    et al.
    Univ Paris Saclay, CNRS, IN2P3, Ctr Sci Nucl & Sci Matiere, Batiment 104-108, F-91405 Orsay, France..
    Frauendorf, S.
    Univ Notre Dame, Dept Phys, Indianapolis, IN 46557 USA..
    Lv, B. F.
    Univ Paris Saclay, CNRS, IN2P3, Ctr Sci Nucl & Sci Matiere, Batiment 104-108, F-91405 Orsay, France..
    Astier, A.
    Univ Paris Saclay, CNRS, IN2P3, Ctr Sci Nucl & Sci Matiere, Batiment 104-108, F-91405 Orsay, France..
    Dupont, E.
    Univ Paris Saclay, CNRS, IN2P3, Ctr Sci Nucl & Sci Matiere, Batiment 104-108, F-91405 Orsay, France..
    Guo, S.
    Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China..
    Liu, M. L.
    Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China..
    Zhou, X. H.
    Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China..
    Wang, K. L.
    Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China..
    Greenlees, P. T.
    Univ Jyvaskyla, Dept Phys, POB 35, FI-40014 Jyvaskyla, Finland..
    Badran, H.
    Univ Jyvaskyla, Dept Phys, POB 35, FI-40014 Jyvaskyla, Finland..
    Cox, D. M.
    Univ Jyvaskyla, Dept Phys, POB 35, FI-40014 Jyvaskyla, Finland.;Lund Inst Technol, Dept Math Phys, S-22362 Lund, Sweden..
    Grahn, T.
    Univ Jyvaskyla, Dept Phys, POB 35, FI-40014 Jyvaskyla, Finland..
    Julin, R.
    Univ Jyvaskyla, Dept Phys, POB 35, FI-40014 Jyvaskyla, Finland..
    Juutinen, S.
    Univ Jyvaskyla, Dept Phys, POB 35, FI-40014 Jyvaskyla, Finland..
    Konki, J.
    Univ Jyvaskyla, Dept Phys, POB 35, FI-40014 Jyvaskyla, Finland.;CERN, CH-1211 Geneva 23, Switzerland..
    Pakarinen, J.
    Univ Jyvaskyla, Dept Phys, POB 35, FI-40014 Jyvaskyla, Finland..
    Papadakis, P.
    Univ Jyvaskyla, Dept Phys, POB 35, FI-40014 Jyvaskyla, Finland.;Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England..
    Partanen, J.
    Univ Jyvaskyla, Dept Phys, POB 35, FI-40014 Jyvaskyla, Finland..
    Rahkila, P.
    Univ Jyvaskyla, Dept Phys, POB 35, FI-40014 Jyvaskyla, Finland..
    Sandzelius, M.
    Univ Jyvaskyla, Dept Phys, POB 35, FI-40014 Jyvaskyla, Finland..
    Saren, J.
    Univ Jyvaskyla, Dept Phys, POB 35, FI-40014 Jyvaskyla, Finland..
    Scholey, C.
    Univ Jyvaskyla, Dept Phys, POB 35, FI-40014 Jyvaskyla, Finland..
    Sorri, J.
    Univ Jyvaskyla, Dept Phys, POB 35, FI-40014 Jyvaskyla, Finland.;Univ Oulu, Sodankyla Geophys Observ, FIN-99600 Sodankyla, Finland..
    Stolze, S.
    Univ Jyvaskyla, Dept Phys, POB 35, FI-40014 Jyvaskyla, Finland.;Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA..
    Uusitalo, J.
    Univ Jyvaskyla, Dept Phys, POB 35, FI-40014 Jyvaskyla, Finland..
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Aktas, Özge
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Ertoprak, Aysegül
    KTH, School of Engineering Sciences (SCI), Physics.
    Liu, Huan
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Engineering.
    Kuti, I
    Hungarian Acad Sci, Inst Nucl Res, H-4001 Debrecen, Hungary..
    Timar, J.
    Hungarian Acad Sci, Inst Nucl Res, H-4001 Debrecen, Hungary..
    Tucholski, A.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5a, PL-02093 Warsaw, Poland..
    Srebrny, J.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5a, PL-02093 Warsaw, Poland..
    Andreoiu, C.
    Simon Fraser Univ, Dept Chem, Burnaby, BC V5A 1S6, Canada..
    Collective rotation of an oblate nucleus at very high spin2019In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 99, no 4, article id 041301Article in journal (Refereed)
    Abstract [en]

    A sequence of nine almost equidistant quadrupole transitions is observed in Nd-137. The sequence represents an extremely regular rotational band that extends to a spin of about 75/2 and an excitation energy of approximate to 4.5 MeV above yrast. Cranked mean-field calculations of the Nilsson-Strutinsky type suggest an oblate shape for the band. They reproduce the observed I(I +1) dependence of the rotational energy whereas predicting a pronounced decrease in the deformation, which is the hallmark of antimagnetic rotation.

  • 23. Petrache, C. M.
    et al.
    Lv, B. F.
    Astier, A.
    Dupont, E.
    Wang, Y. K.
    Zhang, S. Q.
    Zhao, P. W.
    Ren, Z. X.
    Meng, J.
    Greenlees, P. T.
    Badran, H.
    Cox, D. M.
    Grahn, T.
    Julin, R.
    Juutinen, S.
    Konki, J.
    Pakarinen, J.
    Papadakis, P.
    Partanen, J.
    Rahkila, P.
    Sandzelius, M.
    Saren, J.
    Scholey, C.
    Sorri, J.
    Stolze, S.
    Uusitalo, J.
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics.
    Aktas, O.
    Ertoprak, A.
    Liu, H.
    Matta, S.
    Subramaniam, P.
    Guo, S.
    Liu, M. L.
    Zhou, X. H.
    Wang, K. L.
    Kuti, I.
    Timár, J.
    Tucholski, A.
    Srebrny, J.
    Andreoiu, C.
    Evidence of chiral bands in even-even nuclei2018In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 97, no 4, article id 041304Article in journal (Refereed)
    Abstract [en]

    Evidence for chiral doublet bands has been observed for the first time in the even-even nucleus Nd136. One chiral band was firmly established. Four other candidates for chiral bands were also identified, which can contribute to the realization of the multiple pairs of chiral doublet bands (MχD) phenomenon. The observed bands are investigated by the constrained and tilted axis cranking covariant density functional theory (TAC-CDFT). Possible configurations have been explored. The experimental energy spectra, angular momenta, and B(M1)/B(E2) values for the assigned configurations are globally reproduced by TAC-CDFT. Calculated results support the chiral interpretation of the observed bands, which correspond to shapes with maximum triaxiality induced by different multiquasiparticle configurations in Nd136.

  • 24.
    Qian, Yibin
    et al.
    KTH, School of Engineering Sciences (SCI), Physics. Nanjing Univ Sci & Technol, Dept Appl Phys, Nanjing 210094, Jiangsu, Peoples R China..
    Qi, Chong
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Partial seniority conservation and solvability of single- j systems2018In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 98, no 6, article id 061303Article in journal (Refereed)
    Abstract [en]

    The seniority symmetry is known to be partially conserved in two special cases in the (9/2)(4) system, which can lead to striking features in the corresponding structure and electromagnetic transition properties. However, it is still quite difficult to derive those kind of solvable states, in general, especially towards higher- j orbits. We have developed a novel and effective way to confront this challenge by starting from the m scheme and making use of the angular momentum projection method. It also allows us to explore another special family of seniority conserving states in the midshell besides the specific case of the (9/2)(4) configuration. Moreover, we have studied systemically all states in single- j systems up to j = 15/2 and derived the analytic expressions for the eigenvalues of all solvable states with a focus on those in j = 9/2 and j = 11/2. Such studies can also be useful for the experimental search of relevant states and for the understanding of their electromagnetic transition properties.

  • 25.
    Qiang, Y. H.
    et al.
    Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China.;Lanzhou Univ, Sch Nucl Sci & Technol, Lanzhou 730000, Gansu, Peoples R China.;Grad Univ Chinese Acad Sci, Beijing 000049, Peoples R China..
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics. KTH, Dept Phys, S-10691 Stockholm, Sweden..
    Xu, F. R.
    Peking Univ, Dept Tech Phys, Beijing 100871, Peoples R China..
    Identification of high-K rotation in Ba-130: Testing the consistency of electromagnetic observables2019In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 99, no 1, article id 014307Article in journal (Refereed)
    Abstract [en]

    The band built on the K-pi = 8(-), T-1/2 = 9.4 ms isomer of( 130)Ba has been identified, filling the gap in the systematics of the dipole bands built on the 8(- )isomers in the N = 74 isotones from( 128)Xe to Gd-138. The use of the GALILEO array in conjunction with its ancillaries EUCLIDES and Neutron Wall, helped to firmly place the newly identified transitions on top of the long-lived isomer. The extracted g(K)and g(R) gyromagnetic factors are in agreement with the 7/2(+)[404] circle times 9/2(-)[514] two-neutron Nilsson configuration. Particle-rotor model calculations give an understanding of the limited degree of K mixing. The experimental information on the K-pi = 8(-) isomer of Ba-130 is now the most complete among the K isomers of the N = 74 isotones.

  • 26. Ralet, D
    et al.
    Bäck, Torbjörn
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics.
    Doncel, Maria
    KTH.
    Ghazi Moradi, Farnaz
    KTH.
    Zielinska, M.
    et al.,
    Lifetime measurement of neutron-rich even-even molybdenum isotopes2017In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 95, no 3, article id 034320Article in journal (Refereed)
    Abstract [en]

    Background: In the neutron-rich A approximate to 100 mass region, rapid shape changes as a function of nucleon number as well as coexistence of prolate, oblate, and triaxial shapes are predicted by various theoretical models. Lifetime measurements of excited levels in the molybdenum isotopes allow the determination of transitional quadrupole moments, which in turn provides structural information regarding the predicted shape change. Purpose: The present paper reports on the experimental setup, the method that allowed one to measure the lifetimes of excited states in even-even molybdenum isotopes from mass A = 100 up to mass A = 108, and the results that were obtained. Method: The isotopes of interest were populated by secondary knock-out reaction of neutron-rich nuclei separated and identified by the GSI fragment separator at relativistic beam energies and detected by the sensitive PreSPEC-AGATA experimental setup. The latter included the Lund-York-Cologne calorimeter for identification, tracking, and velocity measurement of ejectiles, and AGATA, an array of position sensitive segmented HPGe detectors, used to determine the interaction positions of the gamma ray enabling a precise Doppler correction. The lifetimes were determined with a relativistic version of the Doppler-shift-attenuation method using the systematic shift of the energy after Doppler correction of a gamma-ray transition with a known energy. This relativistic Doppler-shift-attenuation method allowed the determination of mean lifetimes from 2 to 250 ps. Results: Even-even molybdenum isotopes from mass A = 100 to A = 108 were studied. The decays of the low-lying states in the ground-state band were observed. In particular, two mean lifetimes were measured for the first time: tau = 29.7(-9.1)(+11.3) ps for the 4(+) state of Mo-108 and tau = 3.2(-0.7)(+ 0.7) ps for the 6(+) state of Mo-102. Conclusions: The reduced transition strengths B(E2), calculated from lifetimes measured in this experiment, compared to beyond-mean-field calculations, indicate a gradual shape transition in the chain of molybdenum isotopes when going from A = 100 to A = 108 with a maximum reached at N = 64. The transition probabilities decrease for Mo-108 which may be related to its well-pronounced triaxial shape indicated by the calculations.

  • 27. Saygi, B.
    et al.
    Joss, D. T.
    Page, R. D.
    Grahn, T.
    Simpson, J.
    O'Donnell, D.
    Alharshan, G.
    Auranen, K.
    Bäck, Torbjörn
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Boening, S.
    Braunroth, T.
    Carroll, R. J.
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Cullen, D. M.
    Dewald, A.
    Doncel, M.
    Donosa, L.
    Drummond, M. C.
    Ertugral, F.
    Erturk, S.
    Fransen, C.
    Greenlees, P. T.
    Hackstein, M.
    Hauschild, K.
    Herzan, A.
    Jakobsson, U
    KTH.
    Jones, P. M.
    Julin, R.
    Juutinen, S.
    Konki, J.
    Kroell, T.
    Labiche, M.
    Lopez-Martens, A.
    McPeake, C. G.
    Moradi, F.
    Moeller, O.
    Mustafa, M.
    Nieminen, P.
    Pakarinen, J.
    Partanen, J.
    Peura, P.
    Procter, M.
    Rahkila, P.
    Rother, W.
    Ruotsalainen, P.
    Sandzelius, M.
    Saren, J.
    Scholey, C.
    Sorri, J.
    Stolze, S.
    Taylor, M. J.
    Thornthwaite, A.
    Uusitalo, J.
    Reduced transition probabilities along the yrast line in W-1662017In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 96, no 2, article id 021301Article in journal (Refereed)
    Abstract [en]

    Lifetimes of excited states in the yrast band of the neutron-deficient nuclide W-166 have been measured utilizing the DPUNS plunger device at the target position of the JUROGAM II gamma-ray spectrometer in conjunction with the RITU gas-filled separator and the GREAT focal-plane spectrometer. Excited states in W-166 were populated in the Mo-92(Kr-78, 4p) reaction at a bombarding energy of 380 MeV. The measurements reveal a low value for the ratio of reduced transitions probabilities for the lowest-lying transitions B(E2; 4(+)-> 2(+)) / B(E2; 2(+)-> 0(+)) = 0.33(5), compared with the expected ratio for an axially deformed rotor (B-4/2 = 1.43).

  • 28. Wang, F.
    et al.
    Sun, B. H.
    Liu, Z.
    Qi, Chong
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Zhu, L. H.
    Scholey, C.
    Ashley, S. F.
    Bianco, L.
    Cullen, I. J.
    Darby, I. G.
    Eeckhaudt, S.
    Garnsworthy, A. B.
    Gelletly, W.
    Gomez-Hornillos, M. B.
    Grahn, T.
    Greenlees, P. T.
    Jenkins, D. G.
    Jones, G. A.
    Jones, P.
    Joss, D. T.
    Julin, R.
    Juutinen, S.
    Ketelhut, S.
    Khan, S.
    Kishada, A.
    Leino, M.
    Niikura, M.
    Nyman, M.
    Page, R. D.
    Pakarinen, J.
    Pietri, S.
    Podolyak, Zs.
    Rahkila, P.
    Rigby, S.
    Saren, J.
    Shizuma, T.
    Sorri, J.
    Steer, S.
    Thomson, J.
    Thompson, N. J.
    Uusitalo, J.
    Walker, P. M.
    Williams, S.
    Reinvestigation of the excited states in the proton emitter Lu-151: Particle-hole excitations across the N = Z=64 subshell2017In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 96, no 6, article id 064307Article in journal (Refereed)
    Abstract [en]

    The excited states of the proton emitter Lu-151 were reinvestigated in a recoil-decay tagging experiment at the Accelerator Laboratory of the University of Jyvaskyla (JYFL). The level scheme built on the ground state of 151Lu was updated with five new y-ray transitions. Large-scale shell model calculations were carried out in the model space consisting of the neutron and proton orbitals 0g(7/2), Id(5/2), Id(3/2), 2s(1/2), and Oh(1/2) with the optimized monopole interaction in order to interpret the experimental level scheme of Lu-151. It is found that the excitation energies of states above the 27/2(-) and 23/2(+) isomeric levels in Lu-151 can be sensitive to excitations from g(7/2) and d(5/2) to single-particle orbitals above N = Z = 64.

  • 29.
    Wu, Shuangxiang
    et al.
    Nanjing Univ Sci & Technol, Dept Appl Phys, Nanjing 210094, Jiangsu, Peoples R China..
    Qian, Yibin
    KTH, School of Engineering Sciences (SCI), Physics. Nanjing Univ Sci & Technol, Dept Appl Phys, Nanjing 210094, Jiangsu, Peoples R China.
    Ren, Zhongzhou
    Tongji Univ, Sch Phys Sci & Engn, Shanghai 200092, Peoples R China..
    Half-lives of alpha-decaying nuclei in the medium-mass region within the transfer matrix method2018In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 97, no 5, article id 054316Article in journal (Refereed)
    Abstract [en]

    The alpha-decay half-lives of even-even nuclei from Sm to Th are systematically studied based on the transfer matrix method. For the nuclear potential, a type of cosh-parametrized form is applied to calculate the penetration probability. Through a least-squares fit to experimental half-lives, we optimize the parameters in the potential and the a preformation factor P-0. During this process, P-0 is treated as a constant for each parent nucleus. Eventually, the calculated half-lives are found to agree well with the experimental data, which verifies the accuracy of the present approach. Furthermore, in recent studies, P-0 is regulated by the shell and paring effects plus the nuclear deformation. To this end, P-0 is here associated with the structural quantity, i.e., the microscopic correction of nuclear mass (E-mic). In this way, the agreement between theory and experiment is greatly improved by more than 20%, validating the appropriate treatment of P-0 in the scheme of E-mic.

  • 30. Zhang, Y. L.
    et al.
    Wang, Y. Z.
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics. Department of Mathematics and Physics, Shijiazhuang Tiedao University, China; Institute of Applied Physics, Shijiazhuang Tiedao University, China; China Institute of Atomic Energy, Beijing 102413, China.
    Systematic study of cluster radioactivity of superheavy nuclei2018In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 97, no 1, article id 014318Article in journal (Refereed)
    Abstract [en]

    The probable cluster radioactivity (CR) of 118294, 120296, and 122298 is studied by using the unified description (UD) formula, universal (UNIV) curve, Horoi formula, and universal decay law (UDL). The predictions by the former three models suggest that the probable emitted clusters are lighter nuclei, and the calculations within the UDL formula give a different prediction: that both the lighter clusters and heavier ones can be emitted from the parent nuclei. A further study on the competition between α decay and CR of Z=104-124 isotopes is performed. The former three models predict that α decay is the dominant decay mode, but the UDL formula suggests that CR dominates over α decay for Z≥118 nuclei and the isotopes of 118292-296,308-318, 120,284-304,308-324 and 122316-322 are the most likely candidates as the cluster emitters. Because the former three formulas are just preformation models, the lighter cluster emissions can be described. However, the UDL formula can predict the lighter and heavier CR owing to the inclusion of the preformation and fissionlike mechanisms. Finally, it is found that the shortest CR half-lives are always obtained when the daughter nuclei are around the double magic Pb208 within the UDL formula, which indicates that shell effect has an important influence on CR. 

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