The geochemical coherence of PU and Nd and the Pu-244/U-238 ratio of the early solar system

Details The geochemical coherence of PU and Nd and the Pu-244/U-238 ratio of the early solar system The geochemical coherence of PU and Nd and the Pu-244/U-238 ratio of the early solar system

Oct 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982gecoa..46.1793j&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 46, Oct. 1982, p. 1793-1804.

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5

Chondrites, Geochemistry, Meteoritic Composition, Plutonium 238, Solar System, Evolution (Development), Neodymium, Nuclear Fusion, Radioactive Age Determination, Rare Earth Elements

Scientific paper

Two very different sets of Pu-244/U-238 ratios have been reported for early solar system materials, one high and the other low, and this paper examines how one of these groups may yield an incorrect ratio. Recently measured partition coefficients for Pu and Sm (Jones, 1981) are used to evaluate Pu-Nd fractionation during achondrite genesis, and Pu-244/U-238 ratios of chondrites, achondrites, and Ca-Al-rich inclusions are compared and discussed. A low Pu-244/U-238 ratio is favored, and some implications of this low ratio for galactic nucleosynthesis and meteorite age dating are briefly discussed.

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