Robust Regularity in \gamma-Soft Nuclei and its Microscopic Realization
Abstract
\gamma-softness in atomic nuclei is investigated in the framework of energy density functionals. By mapping constrained microscopic energy surfaces for a set of representative non-axial medium-heavy and heavy nuclei to a Hamiltonian of the proton-neutron interacting boson model (IBM-2) containing up to three-body interactions, low-lying collective spectra and transition rates are calculated. Observables are analyzed that distinguish between the two limiting geometrical pictures of non-axial nuclei: the rigid-triaxial rotor and the \gamma-unstable rotor. It is shown that neither of these pictures is realized in actual nuclei, and that a microscopic description leads to results that are almost exactly in between the two geometrical limits. This finding points to the optimal choice of the IBM Hamiltonian for \gamma-soft nuclei.
Cite
@article{arxiv.1109.5754,
title = {Robust Regularity in \gamma-Soft Nuclei and its Microscopic Realization},
author = {K. Nomura and N. Shimizu and D. Vretenar and T. Niksic and T. Otsuka},
journal= {arXiv preprint arXiv:1109.5754},
year = {2015}
}
Comments
5 pages, 3 figures, Phys. Rev. Lett. in press