EFFECTS OF SHOCK PROPAGATION ON NEUTRINO OSCILLATION AND ?-INDUCED NUCLEOSYNTHESIS IN SUPERNOVA

Abstract

We discuss effects of shock propagation on neutrino (nu) oscillation in supernova environment, which affects directly nu-induced nucleosynthesis. Since electron number density varies rapidly behind and in front of the shock, multiple resonances of mixing angles by adiabatic and/or non-adiabatic electron density change can occur during the shock propagation. In this work, we report detailed analysis of the nu oscillation in matter and the nu-induced nucleosynthesis by the shock propagation. The shock effects increase abundances by about 16% of La-138, 14% of Nb-92 and 7% of Tc-98, whose main synthesized region is O-Ne-Mg layer in our supernova model. Here, we adopt a simple thermal bomb hydrodynamic model and the normal nu-mass hierarchy.