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High-spin study of odd- isotopes beyond the neutron mid-shellR. Lucas1, M.-G. Porquet2, Ts. Venkova3, I. Deloncle2, M. Houry1, Ch. Theisen1, A. Astier4, A. Bauchet2, S. Lalkovski2, G. Barreau5, N. Buforn4, T.P. Doan5, L. Donadille6, O. Dorvaux7, J. Durell8, Th. Ethvignot9, B.P.J. Gall7, D. Grimwood8, W. Korten1, Y. Le Coz1, M. Meyer4, A. Minkova2, 10, A. Prévost4, N. Redon4, A. Roach8, N. Schulz7, A.G. Smith8, O. Stézowski4 and B.J. Varley8
1 Commissariat à l'Énergie Atomique, CEA/Saclay, DSM/DAPNIA/SPhN, 91191 Gif-sur-Yvette Cedex, France
2 CSNSM, IN2P3-CNRS and Université Paris-Sud, 91405 Orsay, France
3 INRNE, BAS, 1784 Sofia, Bulgaria
4 IPNL, IN2P3-CNRS and Université Claude Bernard, 69622 Villeurbanne Cedex, France
5 CENBG, IN2P3-CNRS and Université Bordeaux I, 33175 Gradignan, France
6 School of Physics and Astronomy, University of Birmingham, Birmingham, B15 2TT, United Kingdom
7 IReS, IN2P3-CNRS and Université Louis Pasteur, 67037 Strasbourg, France
8 Department of Physics and Astronomy, University of Manchester, Manchester, M13 9PL, United Kingdom
9 Commissariat à l'Energie Atomique Bruyères-le-Châtel, CEA/DIF/SPN, BP12, 91680 Bruyères-le-Châtel, France
10 University of Sofia, Faculty of Physics, 1126 Sofia, Bulgaria
(Received: 24 May 2002 / Published online: 19 November 2002)
The nuclei have been produced as fission fragments in three reactions induced by heavy ions: + at 90 MeV bombarding energy, + reaction at 85 MeV, and + at 152 MeV. Their level schemes have been built from gamma-rays detected using the EUROBALL III and IV arrays. High-spin states of nuclei have been identified for the first time. Moreover, isomeric states lying around 2.5 MeV have been established in from the delayed coincidences between the fission fragment detector SAPhIR and the gamma array. Most of the observed states can be described by coupling a proton g9/2 hole to a core, while the intruder band based on an orbital from the sub-shells behaves as the ground-state band of neighbouring Cd isotopes.
21.60.Ev - Collective models.
23.20.Lv - Gamma transitions and level energies.
25.85.Ge - Charged-particle-induced fission.
27.60.+j - .
© Società Italiana di Fisica, Springer-Verlag 2002