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20 April 2024 |
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Article overview
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Supernova Neutrino Process of Li and B Revisited | | Motohiko Kusakabe
; Myung-Ki Cheoun
; K. S. Kim
; Masa-aki Hashimoto
; Masaomi Ono
; Ken'ichi Nomoto
; Toshio Suzuki
; Toshitaka Kajino
; Grant J. Mathews
; | | Date: |
7 Jan 2019 | | Abstract: | We reinvestigate effects of neutrino oscillations on the production of 7Li
and 11B in core-collapse supernovae (SNe). During the propagation of neutrinos
from the proto-neutron star, their flavors change and the neutrino reaction
rates for spallation of 12C and 4He are affected. In this work corrected
neutrino spallation cross sections for 4He and 12C are adopted. Initial
abundances involving heavy s-nuclei and other physical conditions are derived
in a new calculation of the SN 1987A progenitor in which effects of the
progenitor metallicity are included. A dependence of the SN nucleosynthesis and
final yields of 7Li and 11B on the neutrino mass hierarchy are shown in several
stellar locations. In the normal hierarchy case, the charged current reaction
rates of electron neutrinos are enhanced, and yields of proton-rich nuclei,
along with 7Be and 11C, are increased. In the inverted hierarchy case, the
charged current reaction rates of electron antineutrinos are enhanced, and
yields of neutron-rich nuclei, along with 7Li and 11B, are increased. We find
that variation of the metallicity modifies the yields of 7Li, 7Be, 11B, and
11C. This effect is caused by changes in the neutron abundance during SN
nucleosynthesis. Therefore, accurate calculations of Li and B production in SNe
should take into account the metallicity of progenitor stars. | | Source: | arXiv, 1901.1715 | | Services: | Forum | Review | PDF | Favorites | |
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