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Evidence for live 247Cm in the early Solar System

Nature volume 286, pages 118–122 (1980)Cite this article

Abstract

Variations of the 238U/235U ratio in the Allende meteorite, ranging from −35% to + 19%, are interpreted as evidence of live 247Cm in the early Solar System. The amounts of these and other r-products in the Solar System indicate values of (9,000±3,000) Myr for the age of the Galaxy and ∼ 8 Myr for the time between the end of nucleosynthesis and the formation of meteoritic grains. Three possible explanations are presented for the different values of the latter time period which are indicated by the decay products of 247Cm, 26Al, 244Pu and 129I.

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Author notes

  1. Tadashi Shimamura

    Present address: Department of Chemistry, University of California, San Diego, La Jolla, California, 92093

Authors and Affiliations

  1. US Geological Survey, MS 963, Box 25046, Denver, Colorado, 80225

    Mitsunobu Tatsumoto

  2. Department of Chemistry and Geochemistry, Colorado School of Mines, Golden, Colorado, 80401

    Tadashi Shimamura

Authors
  1. Mitsunobu Tatsumoto
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  2. Tadashi Shimamura
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Tatsumoto, M., Shimamura, T. Evidence for live 247Cm in the early Solar System. Nature 286, 118–122 (1980). https://doi.org/10.1038/286118a0

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