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THE LU ISOTOPIC COMPOSITION OF ACHONDRITES: CLOSING THE CASE FOR ACCELERATED DECAY OF (LU)-L-176

Wimpenny, Josh B; Amelin, Yuri; Yin, Qing-zhu

Description

Studies of Lu-Hf isotope systematics in meteorites have produced apparent "ages" that are older than Pb-Pb ages and older than the estimated age of our solar system. One proposed explanation for this discrepancy is that irradiation by cosmic rays caused excitation of 176Lu to its short-lived isomer that then underwent rapid decay to 176Hf. This explanation can account for apparent excesses in 176Hf that correlate with Lu/Hf ratio. Mass balance requires that samples with measurable excess in...[Show more]

CollectionsANU Research Publications
Date published: 2015
Type: Journal article
URI: http://hdl.handle.net/1885/153596
Source: Astrophysical Journal Letters
DOI: 10.1088/2041-8205/812/1/L3
Access Rights: Open Access

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