Supernova neutrino nucleosynthesis of the radioactive 92Nb observed in primitive meteorites

T. Hayakawa, K. Nakamura, T. Kajino, S. Chiba, N. Iwamoto, M. K. Cheoun, G. J. Mathews

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    31 Citations (Scopus)


    The isotope 92Nb decays to 92Zr with a half-life of 3.47 × 107 yr. Although this isotope does not exist in the current solar system, initial abundance ratios for 92Nb/ 93Nb 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 92Nb via neutrino-induced reactions in core-collapse supernovae (ν-process). Our calculated result shows that the observed ratio of 92Nb/93Nb ∼ 10-5 can be explained by the ν-process.

    Original languageEnglish
    Article numberL9
    JournalAstrophysical Journal Letters
    Issue number1
    Publication statusPublished - 2013 Dec 10


    • meteorites, meteors, meteoroids
    • neutrinos
    • supernovae: general

    ASJC Scopus subject areas

    • Space and Planetary Science
    • Astronomy and Astrophysics


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