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Title: Neutrino-induced nucleosynthesis in supernovae

Abstract

The neutrino-induced reactions in supernova explosions produce some rare odd-odd nuclides. We have made a new time-dependent calculation of the supernova production ratio of the long-lived isomeric state of {sup 180}Ta. This time-dependent solution is crucial for understanding the production and survival of this isotope. We find that the explicit time evolution of the synthesis of {sup 180}Ta using the available nuclear data avoids the overproduction relative to {sup 138}La for a {nu}-process neutrino temperature of 4 MeV. An unstable isotope {sup 92}Nb decays to {sup 92}Zr with a half-life of 3.47 Multiplication-Sign 10{sup 7} years. We have proposed the {nu}-process origin for {sup 92}Nb. We calculate key neutrino-induced reactions and supernova {nu}-process. Our calculated result shows that the abundance of {sup 92}Nb can be explained by the {nu}-process.

Authors:
 [1]
  1. Japan Atomic Energy Agency, Tokai-mura, Ibaraki-ken 319-1195 (Japan) and National Astronomical Observatory, Mitaka, Tokyo 181-8588 (Japan)
Publication Date:
OSTI Identifier:
22075739
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1484; Journal Issue: 1; Conference: Conference on origin of matter and evolution of galaxies 2011, Wako (Japan), 14-17 Nov 2011; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ASTROPHYSICS; ELEMENT ABUNDANCE; HALF-LIFE; ISOMERIC NUCLEI; LANTHANUM 138; MEV RANGE; NEUTRINO REACTIONS; NIOBIUM 92; NUCLEOSYNTHESIS; STAR EVOLUTION; SUPERNOVAE; TANTALUM 180; TIME DEPENDENCE; ZIRCONIUM 92

Citation Formats

Hayakawa, Takehito. Neutrino-induced nucleosynthesis in supernovae. United States: N. p., 2012. Web. doi:10.1063/1.4763385.
Hayakawa, Takehito. Neutrino-induced nucleosynthesis in supernovae. United States. doi:10.1063/1.4763385.
Hayakawa, Takehito. Mon . "Neutrino-induced nucleosynthesis in supernovae". United States. doi:10.1063/1.4763385.
@article{osti_22075739,
title = {Neutrino-induced nucleosynthesis in supernovae},
author = {Hayakawa, Takehito},
abstractNote = {The neutrino-induced reactions in supernova explosions produce some rare odd-odd nuclides. We have made a new time-dependent calculation of the supernova production ratio of the long-lived isomeric state of {sup 180}Ta. This time-dependent solution is crucial for understanding the production and survival of this isotope. We find that the explicit time evolution of the synthesis of {sup 180}Ta using the available nuclear data avoids the overproduction relative to {sup 138}La for a {nu}-process neutrino temperature of 4 MeV. An unstable isotope {sup 92}Nb decays to {sup 92}Zr with a half-life of 3.47 Multiplication-Sign 10{sup 7} years. We have proposed the {nu}-process origin for {sup 92}Nb. We calculate key neutrino-induced reactions and supernova {nu}-process. Our calculated result shows that the abundance of {sup 92}Nb can be explained by the {nu}-process.},
doi = {10.1063/1.4763385},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1484,
place = {United States},
year = {2012},
month = {11}
}