Neutrinos, supernovae, molybdenum, and extinct 92Nb

Details Neutrinos, supernovae, molybdenum, and extinct 92Nb Neutrinos, supernovae, molybdenum, and extinct 92Nb

May 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003nupha.719...13m&link_type=abstract

Nuclear Physics A, Volume 719, p. C13-C20.

Physics

Nuclear Physics

2

Scientific paper

Alpha-rich freezeouts in matter near the mass cut in supernovae, aided by neutrino-induced reactions, can strongly produce the light p-isotopes 92,94Mo, whose provenance is currently not well understood. If such alpha-rich freezeouts are responsible for the bulk of the solar system's supply of these isotopes, then they also robustly produce radioactive 92Nb, which would lead to a steady-state ratio of 92Nb/93Nb in the interstellar medium higher than inferred to have been present in the early solar system. Such a result would place 92Nb in the same category as the short-lived r-process chronometers 107Pd, 129I, and 244Pu, which were also less abundant in the early solar system than steady-state expectations would suggest.
Research funded by NASA (NAG5-4703), the U. S. NSF (AST-9819877), and the U. S. Department of Energy (SciDAC). The author thanks his collaborators D. D. Clayton, L.-S. The, and G. McLaughlin for help and advice and colleagues A. Davis and N. Dauphas for helpful comments.

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