Thermal effects on neutrino-nucleus inelastic scattering in stellar environments

Abstract

Thermal effects for inelastic neutrino-nucleus scattering off even-even nuclei in the iron region are studied. Allowed and first-forbidden contributions to the cross sections are calculated within the quasiparticle random phase approximation, extended to finite temperatures within the Thermo-Field-Dynamics formalism. The GT${}_0$ strength distribution at finite temperatures is calculated for the sample nucleus ${}^{54}$Fe. The neutral-current neutrino-nucleus inelastic cross section is calculated for relevant temperatures during the supernova core collapse. The thermal population of the excited states significantly enhances the cross section at low neutrino energies. In agreement with studies using a large scale shell-model approach the enhancement is mainly due to neutrino up-scattering at finite temperatures.

This is a preprint of an article accepted for publication in Physics of Atomic Nuclei

References in corpus (2)

• Gamow-Teller strength distributions at finite temperatures and electron capture in stellar environments
• Thermal Bogoliubov transformation in nuclear structure theory

Cited by in corpus (8)

• Neutrino-nucleus reactions and their role for supernova dynamics and nucleosynthesis
• The Evolution towards Electron-capture Supernovae: the Flame Propagation and the Pre-bounce Electron-neutrino Radiation
• Thermal QRPA with Skyrme interactions and supernova neutral-current neutrino-nucleus reactions
• Inelastic neutrino scattering off hot nuclei in supernova environments
• Thermal quasiparticle random-phase approximation calculations of stellar electron capture rates with the Skyrme effective interaction
• Large-scale calculations of supernova neutrino-induced reactions in Z=8-82 target nuclei
• Neutrino absorption by hot nuclei in supernova environments
• Neutrino pair emission from thermally excited nuclei in stellar collapse