Speaker
Kazumi Kashiyama
Description
We study a type of particle acceleration that operates via neutron-proton conversion (NPC) in in- elastic nuclear collisions. This mechanism can be expected for relativistic shocks at subphotospheres if relativistic outflows contain neutrons. Using a test-particle approximation, we numerically calcu- late the energy spectrum and the efficiency of accelerated particles, and show that a good energy fraction of the nucleons may be accelerated. The NPC acceleration may especially be relevant if the shock is radiation-mediated, and it would enhance the detectability of GeV-TeV neutrinos.
