出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We present a new primary nucleosynthesis process, the n p-process, occurring in supernovae (and
possibly gamma-ray bursts) when strong neutrino fluxes create proton-rich ejecta. In this process,
antineutrino absorptions in the proton-rich environment produce neutrons that are immediately
captured by neutron-deficient nuclei. The capture of these neutrons permits to overcome the long
beta-decay lifetimes of proton-rich nuclei like 64Ge, allowing the nucleosynthesis flow to proceed
to nuclei with mass numbers A > 64. This process is a possible candidate to explain the origin of
the solar abundances of the light p-nuclei (such as 92;94Mo and 96;98Ru) and also offers a natural
explanation for the large abundance of Sr (and other elements beyond Fe) seen in the very early
stage of the galactic evolution.
