Journal
ASTROPHYSICAL JOURNAL
Volume 686, Issue 1, Pages 448-466Publisher
IOP PUBLISHING LTD
DOI: 10.1086/591266
Keywords
neutrinos; nuclear reactions; nucleosynthesis; abundances; supernovae : general
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Funding
- Ministry of Education, Culture, Sports, Science and Technology [17740130, 17540275, 18540290, 18560805]
- Mitsubishi Foundation
- JSPS Core-to-Core Program
- International Research Network for Exotic Femto Systems (EFES)
- Grants-in-Aid for Scientific Research [17740130, 17540275, 18560805, 18540290] Funding Source: KAKEN
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The neutrino-nucleus reaction cross sections of He-4 and C-12 are evaluated using new shell model Hamiltonians. Branching ratios of various decay channels are calculated to evaluate the yields of Li, Be, and B produced through the v-process in supernova explosions. The new cross sections enhance the yields of Li-7 and B-11 produced during the supernova explosion of a 16.2 M-circle dot star model compared to the case using the conventional cross sections by about 10%. On the other hand, the yield of B-10 decreases by a factor of 2. The yields of Li-6, Be-9, and the radioactive nucleus Be-10 are found at a level of similar to 10(-11) M-circle dot. The temperature of v(mu,tau)- and (v) over bar (mu,tau)- neutrinos inferred from the supernova contribution of B-11 in Galactic chemical evolution models is constrained to the 4.3-6.5 MeV range. The increase in the Li-7 and B-11 yields due to neutrino oscillations is demonstrated with the new cross sections.
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