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Time Interval between Nucleogenesis and the Formation of Meteorites

Wasserburg, G. J. and Hayden, R. J. (1955) Time Interval between Nucleogenesis and the Formation of Meteorites. Nature, 176 (4472). pp. 130-131. ISSN 0028-0836. doi:10.1038/176130b0.

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While determining the radiogenic argon-40 content of the Beardsley chondritic meteorite, a mass spectrometric search for xenon-129 produced by decay of iodine-129 was made. The total amount of xenon which was observed was 5 × 10⁻⁹ c.c. (s.t.p.) from a 29.86-gm. meteorite sample. Within the limits of experimental error, this xenon had a normal isotopic composition. The ratio of xenon to argon-36 was in essential agreement with that found in air, indicating that this xenon was due to atmospheric contamination. Since a 30 per cent increase in the abundance of xenon-129 over that observed in normal xenon would have been observable, this indicates that radiogenic xenon-129 was present in this meteorite to less than 1.3 × 10⁻¹¹ c.c. (s.t.p.)/gm. H. E. Suess and M. G. Inghram (personal communication) have suggested that if the meteorites had been formed soon after the formation of the elements, they would contain an excess of xenon-129 due to decay of iodine-129.

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Wasserburg, G. J.0000-0002-7957-8029
Additional Information:We thank Prof. M. G. Inghram and Prof. H. C. Urey for several stimulating discussions. This work was performed in part under the auspices of the U.S. Atomic Energy Commission.
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Atomic Energy CommissionUNSPECIFIED
Issue or Number:4472
Record Number:CaltechAUTHORS:20221121-941303200.1
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:117935
Deposited By: Tony Diaz
Deposited On:29 Nov 2022 18:09
Last Modified:29 Nov 2022 18:09

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