Naslov
Spectroscopy of reflection-asymmetric nuclei with relativistic energy density functionals

Autori
Xia, S.Y. ; Tao, H. ; Li, Zhipan ; Nikšić, Tamara ; Vretenar, Dario

Izvornik
Physical review. C (2469-9985) 96 (2017), 5; 054303, 14

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

Ključne riječi
nuclear energy density functional, collective models, electromagnetic transitions

Sažetak
Quadrupole and octupole deformation energy surfaces, low-energy excitation spectra, and transition rates in 14 isotopic chains: Xe, Ba, Ce, Nd, Sm, Gd, Rn, Ra, Th, U, Pu, Cm, Cf, and Fm, are systematically analyzed using a theoretical framework based on a quadrupole- octupole collective Hamiltonian (QOCH), with parameters determined by constrained reflection- asymmetric and axially symmetric relativistic mean-field calculations. The microscopic QOCH model based on the PC-PK1 energy density functional and δ-interaction pairing is shown to accurately describe the empirical trend of low- energy quadrupole and octupole collective states, and predicted spectroscopic properties are consistent with recent microscopic calculations based on both relativistic and nonrelativistic energy density functionals. Low-energy negative- parity bands, average octupole deformations, and transition rates show evidence for octupole collectivity in both mass regions, for which a microscopic mechanism is discussed in terms of evolution of single-nucleon orbitals with deformation.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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