University of Minnesota
School of Physics & Astronomy

Physics and Astronomy Calendar

Wednesday, September 10th 2014
1:25 pm:
Nuclear Physics Seminar in 435 Physics
Speaker: Yong-Zhong Qian (UMN)
Subject: Neutrino-Induced Nucleosynthesis in He Shells of Early Supernovae

Proto-neutron stars produced by core-collapse supernovae emit neutrinos and antineutrinos of all three flavors for approximately 10 s. These neutrinos can produce neutrons through spallation of alpha particles, which dominate the composition of the He shell of the supernova. Both light nuclei such as 7Li and 9Be and heavy nuclei up to the actinides can be produced through subsequent neutron capture. I will discuss how this neutrino-induced nucleosynthesis depends on neutrino physics, neutron-capture cross sections, initial metallicity of the supernova progenitor, and supernova explosion energy. Comparison with observations of elemental abundances in metal-poor stars will be presented.

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