https://doi.org/10.1051/epjconf/20146602012
Quadrupole collectivity in neutron-rich Cd isotopes
1 Institut für Kernphysik, Technische Universität Darmstadt, Darmstadt, Germany
2 INRNE, Bulgarian Academy of Sciences, Sofia, Bulgaria
3 Institut für Kernphysik, Universität zu Köln, Köln, Germany
4 Horia Hulubei National Institute for Physics and Nuclear Engineering, Bucharest, Romania
5 Instituut voor Kern- en Stralingsfysica, KU Leuven, Leuven, Belgium
6 Belgian Nuclear Research Centre SCK CEN, Mol, Belgium
7 CERN, Geneva, Switzerland
8 Technische Universität München, München, Germany
9 Faculty of Physics, University of Warsaw, Warsaw, Poland
10 Instituto de Estructura de la Materia, Consejo Superior de Investigaciones Científicas, Madrid, Spain
11 Fakultät für Physik, Ludwig-Maximilians-Universität, München, Germany
12 Faculty of Physics, St.Kliment Ohridski University of Sofia, Sofia, Bulgaria
13 Laboratoire de Physique Subatomique et de Cosmologie, Grenoble, France
14 Department of Physics, University of York, York, United Kingdom
a e-mail: sboenig@ikp.tu-darmstadt.de
Published online: 20 March 2014
The investigation of the excitation energies of the 21+ –states in the neutron-rich Cd isotopes shows an irregular behaviour when approaching the neutron shell-closure at N = 82. The energy of the 21+–state in 128Cd is lower than the one in 126Cd. The transition strength B(E2, 0gs+ → 21+) in the even isotopes 122−128Cd was measured in Coulomb excitation experiments with the high-purity germanium detector array MINIBALL at REXISOLDE (CERN). The values for 122,124Cd coincide with beyond-mean-field calculations with a resultant prolate deformation, whereas 126,128Cd are better described by shell-model calculations.
© Owned by the authors, published by EDP Sciences, 2014
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