Supernova Nucleosynthesis: Radioactive Nuclear Reactions and Neutrino-Mass Hierarchy<\/p>\n\n\n\n
speaker: Xingqun Yao<\/p>\n\n\n\n
Abstract:<\/p>\n\n\n\n
We study the sensitivities of nuclear abundances of 7<\/sup>Li, 7<\/sup>Be, 11<\/sup>B, and 11<\/sup>C nuclei to all possible nuclear reactions including short-lived radioactive nuclei in core collapse supernova nucleosynthesis. There is a global trend that the final abundances depend on the variation of n-induced reaction rates for 4<\/sup>+He, 12<\/sup>C and 16<\/sup>O. We also find that p, n, d, t 3<\/sup>He and \u03b1 particles, which are produced from the n-induced reactions, interact secondarily with primary products 7<\/sup>Li, 7<\/sup>Be, 11<\/sup>B, and 11<\/sup>C, resulting in a remarkable destruction of these nuclei. This mechanism generates nonlinear sensitivity to the primary n-A reaction rates. In particular, the poorly known radioactive nuclear reactions 11<\/sup>C(\u03b1, n) are found, for the first time, to affect strongly the final 11<\/sup>C abundance. We discuss the impact on the neutrino oscillation effect which depends on neutrino mass-hierarchy.<\/p>\n","protected":false},"excerpt":{"rendered":"