Document Type

Article

Publication Date

1-17-2014

Publication Title

Physical Review Letters

Publisher

American Physical Society

Abstract

We constrain energy spectra of supernova neutrinos through the avoidance of an overproduction of the 11B abundance during Galactic chemical evolution. In supernova nucleosynthesis calculations with a parametrized neutrino spectrum as a function of temperature of νµ,τ and ¯ νµ,τ and total neutrino energy, we find a strong neutrino temperature dependence of the 11B yield. When the yield is combined with observed abundances, the acceptable range of the νµ,τ and ¯νµ,τ temperature is found to be 4.8 to 6.6 MeV. Nonzero neutrino chemical potentials would reduce this temperature range by about 10% for a degeneracy parameter ην = µν/kTν smaller than 3.

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