Speaker
Description
We study the nuclear abundances produced by neutrino process during supernova (SN) explosion. In this presentation, we show the elements of $^{7}$Li, $^{11}$B, $^{92}$Nb, $^{98}$Tc, and $^{138}$La, which are mainly produced by neutrino reactions. To describe the neutrino-induced reaction rates, we consider the neutrino scattering with electron background and neutrinos themselves near the neutrino sphere. As a SN model, we use the SN1987A model for 16.2 $M_\odot$ progenitor with 6 $M_\odot$ He core. Also we consider the time dependent neutrino luminosities and averaged energies adopting 6 averaged SN simulation data. The changed neutrino spectra by this oscillation directly affect the $\nu$-nucleus reaction rate. As a result, the abundances of $^{92}$Nb, $^{98}$Tc, and $^{138}$La are decreased by factor of 1.5-2, while $^{7}$Li and $^{11}$B abundances depends on neutrino mass hierarchy.
| Topic | Nuclear Structure and Nuclear Astrophysics |
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