Supernova Neutrino Process of Li and B Revisited

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.

25 pages, 22 figures, 3 tables, accepted for publication in ApJ, minor corrections added

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Cited by in corpus (13)

• The Gaia-ESO Survey: Galactic evolution of lithium from iDR6
• Neutrinos and nucleosynthesis of elements
• Comprehensive Analyses of the Neutrino-Process in the Core-collapsing Supernova
• The Gaia-ESO Survey: Preparing the ground for 4MOST & WEAVE galactic surveys. Chemical evolution of lithium with machine learning
• Measurements of ${}^{160}$Dy($p,\gamma$) at energies relevant for astrophysical $\gamma$ process
• Discovery of Nine Super Li-rich Unevolved Stars from the LAMOST Survey
• A coherent view of Li depletion and angular momentum transport to explain the Li plateau -- from Population II to Population I stars
• The role of low-lying resonances for ${}^{10}$Be(p,$\alpha$) reaction rate and implications for the formation of the Solar System
• Progress in Nuclear Astrophysics of East and Southeast Asia
• The bi-modal ${}^7$Li distribution of the Milky Way's thin-disk dwarf stars: The role of Galactic-scale events and stellar evolution
• Neutrinos and Heavy Element Nucleosynthesis
• Revisiting the Gamow Factor of Reactions on Light Nuclei
• Monte Carlo study of KDAR ${\nu }_{\mu }$ charged-current scattering on carbon