Triaxiality, chirality and γ-softness

Abstract

Current work explores the impact of γ-softness on partner bands built on the πh11/2νh11/2 particle-hole configurations in triaxial odd-odd nuclei. The results of calculations conducted using a core-particle-hole coupling are presented. The model Hamiltonian includes the collective core, the single-particle valence nucleons, and separable quadrupole-quadrupole interactions. The Kerman-Klein method was applied to find eigenstates, which provided a convenient way for exploring core effects. Calculations were made for triaxial cores with various γ-softness using the General Collective Model keeping the expectation value for the triaxiality parameter fixed at (γ)=30°. The degeneracy in the πh11/2νh11/2 bands results from the calculations for the γ-rigid core but is lifted for the γ-unstable core.