Naslov
β decay and evolution of low-lying structure in Ge and As nuclei

Autori
Nomura, Kosuke

Izvornik
Physical review. C (2469-9985) 105 (2022), 4; 044306, 15

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

Ključne riječi
low-lying structure

Sažetak
A simultaneous calculation for the shape evolution and the related spectroscopic properties of the low-lying states, and the β-decay properties in the even- and odd-mass Ge and As nuclei in the mass A ≈ 70–80 region, within the framework of the nuclear density functional theory and the particle-core coupling scheme, is presented. The constrained self-consistent mean-field calculations using a universal energy density functional (EDF) and a pairing interaction determines the interacting-boson Hamiltonian for the even-even core nuclei, and the essential ingredients of the particle-boson interactions for the odd-nucleon systems, and of the Gamow-Teller and Fermi transition operators. A rapid structural evolution from γ -soft oblate to prolate shapes, as well as the spherical-oblate shape coexistence around the neutron subshell closure N = 40, is suggested to occur in the even-even Ge nuclei. The predicted low-energy spectra, electromagnetic transition rates, and β-decay log f t values are in a reasonable agreement with experiment. The predicted log f t values reflect the structures of the wave functions for the initial and final nuclei of β decay, which are, to a large extent, determined by the microscopic input provided by the underlying EDF calculation.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA