Stellar electron-capture rates on nuclei based on a microscopic Skyrme functional

Znanstveni rad - Izvorni znanstveni rad

• Autor: A. F. Fantina
• Autor: E. Khan
• Autor: G. Colo
• Autor: Nils Paar
• Autor: Dario Vretenar
• Autorova ustanova: Sveučilište u Zagrebu; Prirodoslovno-matematički fakultet; (Fizički odsjek)
• Znanstveno / umjetničko područje, polje i grana: PRIRODNE ZNANOSTI; Fizika

Sažetak (engleski)

We compute electron-capture rates for 54, 56Fe and Ge isotopes using a self-consistent microscopic approach. The single-nucleon basis and the occupation factors in the target nucleus are calculated in the finite-temperature Skyrme Hartree-Fock model, and the Jπ=0±, 1±, 2± charge-exchange transitions are determined in the finite-temperature random-phase approximation (RPA). The scheme is self-consistent ; i.e., both the Hartree-Fock and the RPA equations are based on the same Skyrme functional. Several interactions are used in order to provide a theoretical uncertainty on the electron-capture rates for different astrophysical conditions. Comparing electron-capture rates obtained either with different Skyrme sets or with different available models indicates that differences up to one to two orders of magnitude can arise.

• Ključne riječi (engleski): stellar elecetron capture rates; skyrme energy density functional; random phase approximation
• 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 - Nuclear Physics
• Brojčani podaci: vol. 86, br. 3, 035805
• p-ISSN: 0556-2813
• e-ISSN: 1089-490X
• DOI: https://doi.org/10.1103/PhysRevC.86.035805
• URN:NBN: urn:nbn:hr:217:681047
• Datum objave publikacije: 2012
• Projekt: Šifra: 119-1191005-1010; Naziv (hrvatski): Nuklearna struktura i nuklearna astrofizika; Voditelj: Dario Vretenar; Pravna nadležnost: Hrvatska; Financijer: MZOS; Linija financiranja: ZP
• URL dokumenta: http://link.aps.org/doi/10.1103/PhysRevC.86.035805
• Vrsta resursa: Tekst
• Prava pristupa: Otvoreni pristup
• Javna napomena: Copyright (2012) by the American Physical Society. Received 19 December 2011; published 21 September 2012.
• Datum i vrijeme pohrane: 2019-11-19 20:09:44