Neutrino spectra from stellar electron capture

Details Neutrino spectra from stellar electron capture Neutrino spectra from stellar electron capture

2001-01-18

arxiv.org/abs/nucl-th/0101039v1

Phys.Rev. C64 (2001) 055801

Physics

Nuclear Physics

Nuclear Theory

6 pages, 6 figures

Scientific paper

10.1103/PhysRevC.64.055801

Using the recent shell model evaluation of stellar weak interaction rates we have calculated the neutrino spectra arising from electron capture on pf-shell nuclei under presupernova conditions. We present a simple parametrization of the spectra which allows for an easy implementation into collapse simulations. We discuss that the explicit consideration of thermal ensembles in the parent nucleus broadens the neutrino spectra and results in larger average neutrino energies. The capture rates and neutrino spectra can be easily modified to account for phase space blocking by neutrinos which becomes increasingly important during the final stellar collapse.

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