58. International Winter Meeting on Nuclear Physics

Neutrino self-interaction and MSW effects on the supernova neutrino-process

24 Jan 2020, 17:00

20m

Bormio, Italy

Short Contribution Friday afternoon

Speaker

Heamin Ko (Soongsil University)

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.

Presentation materials

2020Bormio_HeaminKo.pdf