Naslov
Effect of configuration mixing on quadrupole and octupole collective states of transitional nuclei

Autori
Nomura, Kosuke

Izvornik
Physical review. C (2469-9985) 106 (2022), 2; 024330, 13

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

Ključne riječi
quadrupole and octupole collective excitations

Sažetak
A model is presented that simultaneously describes shape coexistence and quadrupole and octupole collective excitations within a theoretical framework based on the nuclear density functional theory and the interacting boson model. An optimal interacting-boson Hamiltonian that incorporates the configuration mixing between normal and intruder states, as well as the octupole degrees of freedom, is identified by means of self- consistent mean-field calculations using a universal energy density functional and a pairing interaction, with constraints on the triaxial quadrupole and the axially symmetric quadrupole and octupole shape degrees of freedom. An illustrative application to the transitional nuclei 72Ge, 74Se, 74Kr, and 76Kr shows that the inclusion of the intruder states and the configuration mixing significantly lower the energy levels of the excited 0+ states, and that the predicted low-lying positive-parity states are characterized by the strong admixture of nearly spherical, weakly deformed oblate, and strongly deformed prolate shapes. The low-lying negative-parity states are shown to be dominated by the deformed intruder configurations.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA