Abstract

High-spin states in 113–116Cd have been investigated with the heavy-ion induced fission reaction 28Si + 176Yb 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 115Cd and the one of 113Cd 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-Ω11/2 quasi-neutron configuration.

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