Calculation of yrast spectra in the doubly even cadmium isotopes.

Abstract

The observed systematics of the low-lying states in {sup 98{minus}110}Cd nuclei and the high-spin yrast spectra with {ital J}{sub max}{sup {pi}}{le}14{sup +} are examined by carrying out Hartree-Fock-Bogoliubov calculations employing a pairing-plus-quadrupole-quadrupole effective interaction operating in a reasonably large valence space outside an inert {sup 80}Zr core. Our calculations reveal that the systematics of the low-lying yrast states in {sup 98{minus}110}Cd are intricately linked with the deformation producing tendency of the {ital n}-{ital p} interaction when operating between spin-orbit-partner (SOP) orbits. Our results indicate that such systematics depend crucially on the simultaneous increase of relative occupation probabilities of the ({ital d}{sub 5/2})-proton and ({ital d}{sub 3/2})-neutron orbits in the {sup 98{minus}100}Cd isotopes.