Naslov
Microscopic core-quasiparticle coupling model for spectroscopy of odd-mass nuclei with octupole correlations

Autori
Sun, W. ; Quan, S. ; Li, Z. P. ; Zhao, J. ; Nikšić, T. ; Vretenar, D.

Izvornik
Physical review. C (2469-9985) 100 (2019), 4; 044319, 12

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

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

Sažetak
Background: Predictions of spectroscopic properties of low-lying states are critical for nuclear structure studies. Theoretical methods can be particularly involved for odd-mass nuclei because of the interplay between the unpaired nucleon and collective degrees of freedom. Only a few models have been developed for systems in which octupole collective degrees of freedom play a role. Purpose: We aim to predict spectroscopic properties of odd- mass nuclei characterized by octupole shape deformation, employing a model that describes single- particle and collective degrees of freedom within the same microscopic framework. Method: A microscopic core-quasiparticle coupling (CQC) model based on the covariant density functional theory is developed, which includes collective excitations of even-mass core nuclei and single-particle states of the odd nucleon, calculated using a quadrupole-octupole collective Hamiltonian combined with a constrained reflection-asymmetric relativistic Hartree-Bogoliubov model. Results: Model predictions for low-energy excitation spectra and transition rates of odd-mass radium isotopes 223, 225, 227Ra are shown to be in good agreement with available data. Conclusions: A microscopic CQC model based on covariant density functional theory has been developed for odd-mass nuclei characterized by both quadrupole and octupole shape deformations. Theoretical results reproduce data in odd-mass Ra isotopes and provide useful predictions for future studies of octupole correlations in nuclei and related phenomena.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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