High-spin structure of the $^{113-116}$Cd isotopes produced by heavy-ion induced fission reaction

Matière NucléaireHigh-spin states in Cd113-116 have been investigated with the heavy-ion induced fission reaction Si-28 + Yb-176 at 165 MeV. The experiment was performed with the Eurogam II array. New rotational bands based on two quasi-particle states have been observed for even-even cadmium isotopes. A new level scheme based on the 11/2(-) isomeric state is proposed for Cd-115 and the one of (11)3Cd has been extended to spin (31/2(-)). Hartree-Fock calculations for even-even isotopes show a prolate deformation in this mass region. The decoupled bands identified in both odd nuclei are interpreted as being built upon a low-Omega(11/2) quasi-neutron configuration