Robust Regularity in γ-Soft Nuclei and Its Microscopic Realization

Nomura, K. and Shimizu, N. and Vretenar, Dario and Nikšić, Tamara and Otsuka, T. (2012) Robust Regularity in γ-Soft Nuclei and Its Microscopic Realization. Physical Review Letters, 108 (13). pp. 132501-5. ISSN 0031-9007

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γ softness in atomic nuclei is investigated in the framework of energy density functionals. By mapping constrained microscopic energy surfaces for a set of representative nonaxial 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 nonaxial nuclei: the rigid-triaxial rotor and the γ-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 γ-soft nuclei.

Item Type: Article
Keywords: nuclear energy density functional, interacting boson model, gamma-soft nuclei
Date: March 2012
Subjects: NATURAL SCIENCES > Physics > Nuclear Physics
Additional Information: Copyright (2012) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Project code: 119-1191005-1010
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 26 Aug 2014 14:03
Last Modified: 23 Feb 2016 16:11

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