Quadrupole-octupole coupling and the evolution of collectivity in neutron-deficient Xe, Ba, Ce, and Nd isotopes

Znanstveni rad - Izvorni znanstveni rad

• Autor: Kosuke Nomura
• Autor: R. Rodríguez-Guzmán
• Autor: L. M. Robledo
• Autorova ustanova: Sveučilište u Zagrebu; Prirodoslovno-matematički fakultet; (Fizički odsjek)
• Znanstveno / umjetničko područje, polje i grana: PRIRODNE ZNANOSTI; Fizika

Sažetak (engleski)

The evolution of quadrupole and octupole collectivity in neutron- deficient Xe, Ba, Ce, and Nd nuclei near the “octupole magic” neutron number N = 56 is investigated within the mapped sdf -IBM framework. Microscopic input is obtained via quadrupole and octupole constrained Hartree-Fock-Bogoliubov calculations, based on the parametrization D1M of the Gogny energy density functional. Octupole-deformed mean-field ground states are predicted for Ba and Ce isotopes near N = 56. Excitation energies of positive- and negative-parity states as well as electric transition rates are computed with wave functions resulting from the diagonalization of the mapped IBM Hamiltonian. The parameters of the Hamiltonian are determined via the mapping of the mean-field potential energy surfaces onto the expectation value of the Hamiltonian in the condensate state of the s, d, and f bosons. Enhanced octupolarity is predicted for Xe, Ba, and Ce isotopes near N = 56. The shape/phase transition from octupole-deformed to strongly quadrupole-deformed near N = 60 is analyzed in detail.

• Ključne riječi (engleski): Nuclear Structure
• 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. 104, br. 5, 054320
• p-ISSN: 2469-9985
• e-ISSN: 2469-9993
• DOI: https://doi.org/10.1103/PhysRevC.104.054320
• URN:NBN: urn:nbn:hr:217:645736
• Datum objave publikacije: 2021-11-29
• Projekt: Šifra: TTP-2018-07-3554; Naziv (hrvatski): Exotic Nuclear Structure and Dynamics; Naziv (engleski): Exotic Nuclear Structure and Dynamics; Kratica: ExoNSD; Voditelj: Kosuke Nomura; Pravna nadležnost: Hrvatska; Financijer: Hrvatska zaklada za znanost; Linija financiranja: Tenure Track Pilot Programme
• URL dokumenta: https://link.aps.org/doi/10.1103/PhysRevC.104.054320
• Vrsta resursa: Tekst
• Prava pristupa: Otvoreni pristup
• Javna napomena: © 2021 American Physical Society. Received 4 October 2021; accepted 16 November 2021; published 29 November 2021.
• Datum i vrijeme pohrane: 2024-09-14 17:13:12