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

Znanstveni rad - Izvorni znanstveni rad

• Autor: W. Sun
• Autor: S. Quan
• Autor: Z. P. Li
• Autor: J. Zhao
• Autor: T. Nikšić
• Autor: D. Vretenar
• Autorova ustanova: Sveučilište u Zagrebu; Prirodoslovno-matematički fakultet; (Fizički odsjek)
• Znanstveno / umjetničko područje, polje i grana: PRIRODNE ZNANOSTI; Fizika

Sažetak (engleski)

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.

• Ključne riječi (engleski): collective models; electromagnetic transitions; nuclear density functional theory
• Jezik: engleski
• Vrsta publikacije: Znanstveni rad - Izvorni znanstveni rad
• Status objave: Objavljen
• Vrsta recenzije: Recenziran - međunarodna recenzija
• Verzija publikacije: Objavljena verzija rada (izdavačev PDF)
• Naslov časopisa: Physical Review C
• Brojčani podaci: vol. 100, br. 4, 044319
• p-ISSN: 2469-9985
• e-ISSN: 2469-9993
• DOI: https://doi.org/10.1103/physrevc.100.044319
• URN:NBN: urn:nbn:hr:217:157616
• Datum objave publikacije: 2019
• URL dokumenta: https://link.aps.org/doi/10.1103/PhysRevC.100.044319
• Vrsta resursa: Tekst
• Prava pristupa: Otvoreni pristup
• Javna napomena: © 2019 American Physical Society. Received 16 July 2019; published 24 October 2019.
• Datum i vrijeme pohrane: 2020-08-21 16:31:39