Naslov
Robust Regularity in γ-Soft Nuclei and Its Microscopic Realization

Autori
Nomura, Kosuke ; Shimizu, Noritaka ; Vretenar, Dario ; Nikšić, Tamara ; Otsuka, Takaharu

Izvornik
Physical Review Letters (0031-9007) 108 (2012), 13; 132501-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, pismo, znanstveni

Ključne riječi
nuclear energy density functional; interacting boson model; gamma-soft nuclei
(nuclear energy density functional; interacting boson model; gamma-soft nucle)

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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