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Triaxiality, chirality and gamma-softness

K. Starosta·M. A. Caprio·T. Koike·R. Kruecken·C. Vaman
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Abstract

Current work explores the impact of gamma-softness on partner bands built on the h11/2h11/2 proton-particle-neutron-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 gamma-softness using the General Collective Model keeping the expectation value for the triaxiality parameter fixed at =30 deg. The degeneracy in the proton-neutron h11/2h11/2 bands results from the calculations for the gamma-rigid core but is lifted for the gamma-unstable core.

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K. Starosta, M. A. Caprio, T. Koike, R. Kruecken, C. Vaman. 2005-04-25. Triaxiality, chirality and gamma-softness. https://doi.org/10.1556/aph.25.2006.2-4.5

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