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

Abstract : 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.
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http://hal.in2p3.fr/in2p3-00440966
Contributor : Sophie Heurteau <>
Submitted on : Monday, December 14, 2009 - 2:17:40 PM
Last modification on : Wednesday, September 16, 2020 - 4:07:56 PM

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N. Paar, G. Colò, E. Khan, D. Vretenar. Calculation of stellar electron-capture cross sections on nuclei based on microscopic Skyrme functionals. Physical Review C, American Physical Society, 2009, 80, 055801 (15 p.). ⟨10.1103/PhysRevC.80.055801⟩. ⟨in2p3-00440966⟩

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