Calculation of stellar electron-capture cross sections on nuclei based on microscopic Skyrme functionals

Znanstveni rad - Izvorni znanstveni rad

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

Sažetak (engleski)

A fully self-consistent microscopic framework for the evaluation of nuclear weak-interaction rates at finite temperature is introduced, based on Skyrme functionals. The single-nucleon basis and the corresponding thermal occupation factors of the initial nuclear state are determined in the finite-temperature Skyrme Hartree-Fock model and charge-exchange transitions to excited states are computed using the finite-temperature random-phase approximation (RPA). Effective interactions are implemented self-consistently: Both the finite-temperature single-nucleon Hartree-Fock equations and the matrix equations of RPA are based on the same Skyrme energy density functional. Using a representative set of Skyrme functionals, the model is applied in the calculation of stellar electron-capture cross sections for selected nuclei in the iron mass group and for neutron-rich Ge isotopes.

• Ključne riječi (engleski): weak interaction; electron capture; supernova
• 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. 80, br. 5, 055801
• p-ISSN: 0556-2813
• e-ISSN: 1089-490X
• DOI: https://doi.org/10.1103/PhysRevC.80.055801
• URN:NBN: urn:nbn:hr:217:338927
• Datum objave publikacije: 2009
• URL dokumenta: http://link.aps.org/doi/10.1103/PhysRevC.80.055801
• Vrsta resursa: Tekst
• Prava pristupa: Otvoreni pristup
• Javna napomena: Copyright (2009) by the American Physical Society. Received 24 July 2009; published 11 November 2009.
• Datum i vrijeme pohrane: 2019-10-28 16:30:58