Quadrupole collectivity in neutron-rich Cd isotopes

EPJ Web Conf.

66
02012
(2014)
S. Bönig, S. Ilieva, T. Kröll, M. Scheck, D. Balabanski, C. Bauer, A. Blazhev, T. Bloch, D. Deleanu, J. Diriken, P. Fernier, R. Gernhäuser, K. Hadyńska-Klȩk, A. Jungclaus, R. Lutter, A. Negret, K. Nowak, R. Orlandi, J. Pakarinen, G. Rainovski, T.R. Rodríguez, M. von Schmid, M. Seidlitz, B. Siebeck, G.S. Simpson, A. Illana Sisón, R. Stegmann, T. Stora, P.G. Thirolf, M. Thürauf, M.J. Vermeulen, D. Voulot, N. Warr, F. Wenander, H. De Witte

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.

DOI
10.1051/epjconf/20146602012
Published on
nwarr