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

doi:10.1088/2041-8205/779/1/L9

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

Research output: Contribution to journal › Article › peer-review

31 Citations (Scopus)

Abstract

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 language	English
Article number	L9
Journal	Astrophysical Journal Letters
Volume	779
Issue number	1
DOIs	https://doi.org/10.1088/2041-8205/779/1/L9
Publication status	Published - 2013 Dec 10

Keywords

meteorites, meteors, meteoroids
neutrinos
supernovae: general

ASJC Scopus subject areas

Space and Planetary Science
Astronomy and Astrophysics

Access to Document

10.1088/2041-8205/779/1/L9

Cite this

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title = "Supernova neutrino nucleosynthesis of the radioactive 92Nb observed in primitive meteorites",

abstract = "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.",

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T1 - Supernova neutrino nucleosynthesis of the radioactive 92Nb observed in primitive meteorites

AU - Hayakawa, T.

AU - Nakamura, K.

AU - Kajino, T.

AU - Chiba, S.

AU - Iwamoto, N.

AU - Cheoun, M. K.

AU - Mathews, G. J.

PY - 2013/12/10

Y1 - 2013/12/10

N2 - 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.

AB - 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.

KW - meteorites, meteors, meteoroids

KW - neutrinos

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