Naslov
Shape transitions in odd-mass γ-soft nuclei within the interacting boson-fermion model based on the Gogny energy density functional
(Shape transitions in odd-mass γ-soft nuclei within the interacting boson-fermion model based on the Gogny energy density functional)

Autori
Nomura, K. ; Rodríguez-Guzmán, R. ; Robledo, L. M.

Izvornik
Physical review. C (2469-9985) 96 (2017), 6; 064316, 13

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

Ključne riječi
γ-soft nuclei ; interacting boson-fermion model ; Gogny energy density functional

Sažetak
The interacting boson-fermion model (IBFM), with parameters determined from the microscopic Hartree-FockBogoliubov (HFB) approximation, based on the parametrization D1M of the Gogny energy density functional, is employed to study the structural evolution in odd-mass γ -soft nuclei. The deformation energy surfaces of even-even nuclei, single-particle energies, and occupation probabilities of the corresponding odd-mass systems have been obtained within the constrained HFB approach. Those building blocks are then used as a microscopic input to build the IBFM Hamiltonian. The coupling constants of the boson-fermion interaction terms are taken as free parameters, fitted to reproduce experimental low-lying spectra. The diagonalization of the IBFM Hamiltonian provides the spectroscopic properties for the studied odd-mass nuclei. The procedure has been applied to compute low-energy excitation spectra and electromagnetic transition rates, in the case of the γ -soft odd-mass systems 129−137Ba, 127−135Xe, 129−137La, and 127−135Cs. The calculations provide a reasonable agreement with the available experimental data and agree well with previous results based on the relativistic mean-field approximation.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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