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

Autori
Paar, Nils ; Colo, Gianluca ; Khan, Elias ; Vretenar, Dario

Izvornik
Physical Review C - Nuclear Physics (0556-2813) 80 (2009), 5; 055801-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
weak interaction; electron capture; supernova

Sažetak
A fully self-consistent microscopic framework for 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 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 tested in the calculation of stellar electron-capture cross sections for selected nuclei in the iron mass group and for neutron-rich Ge isotopes.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

Napomena
Projekt UKF 17/08

POVEZANOST RADA