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Title: SUPERNOVA NEUTRINO NUCLEOSYNTHESIS OF THE RADIOACTIVE {sup 92}Nb OBSERVED IN PRIMITIVE METEORITES

The isotope {sup 92}Nb decays to {sup 92}Zr with a half-life of 3.47 × 10{sup 7} yr. Although this isotope does not exist in the current solar system, initial abundance ratios for {sup 92}Nb/{sup 93}Nb at the time of solar system formation have been measured in primitive meteorites. The astrophysical origin of this material, however, has remained unknown. In this Letter, we present new calculations which demonstrate a novel origin for {sup 92}Nb via neutrino-induced reactions in core-collapse supernovae (ν-process). Our calculated result shows that the observed ratio of {sup 92}Nb/{sup 93}Nb ∼ 10{sup –5} can be explained by the ν-process.
Authors:
; ;  [1] ; ;  [2] ;  [3] ;  [4]
  1. Japan Atomic Energy Agency, Shirakara-Shirane 2-4, Tokai-mura, Ibaraki 319-1195 (Japan)
  2. National Astronomical Observatory, Mitaka, Tokyo 181-8588 (Japan)
  3. Department of Physics, Soongsil University, Seoul 156-743 (Korea, Republic of)
  4. Center for Astrophysics, Department of Physics, University of Notre Dame, Notre Dame, IN 46556 (United States)
Publication Date:
OSTI Identifier:
22364100
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal Letters; Journal Volume: 779; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASTRONOMY; ASTROPHYSICS; COSMIC NEUTRINOS; HALF-LIFE; METEORITES; METEOROIDS; NIOBIUM 92; NIOBIUM 93; NUCLEOSYNTHESIS; SOLAR SYSTEM; SUPERNOVAE; ZIRCONIUM 92