We compute electron-capture rates for Fe-54,Fe-56 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 J(pi) = 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.
|Titolo:||Stellar electron-capture rates on nuclei based on a microscopic Skyrme functional|
|Settore Scientifico Disciplinare:||Settore FIS/04 - Fisica Nucleare e Subnucleare|
|Data di pubblicazione:||2012|
|Digital Object Identifier (DOI):||10.1103/PhysRevC.86.035805|
|Appare nelle tipologie:||01 - Articolo su periodico|