University of Minnesota
School of Physics & Astronomy

Physics and Astronomy Calendar

Wednesday, October 1st 2014
1:25 pm:
Nuclear Physics Seminar in 435 Physics
Speaker: Projjwal Banerjee, U Minnesota
Subject: Beryllium Synthesis in the Early Galaxy

Beryllium is thought to be produced exclusively by the interaction of Galactic Cosmic Rays with the Inter Stellar Medium. We present two new neutrino-induced mechanisms for the synthesis of Beryllium in Core Collapse Supernovae. The first mechanism occurs in the He shell of progenitors of 11-15 solar masses with initial metallicity [Z]<~ -3 via neutron capture process. The second mechanism occurs in the compact low mass progenitors of ~8-10 solar masses where the fast expansion of the shocked He layer results in Be production. We discuss the sensitivity of the mechanisms on supernova neutrino spectra, neutrino mass hierarchy, and the explosion energy. We find that the resulting Be yields can account for Be in the early Galaxy.

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