Extinct 244Pu in Ancient Zircons

Details Extinct 244Pu in Ancient Zircons Extinct 244Pu in Ancient Zircons

Oct 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sci...306...89t&link_type=abstract

Science, Volume 306, Issue 5693, pp. 89-91 (2004).

Computer Science

17

Scientific paper

We have found evidence, in the form of fissiogenic xenon isotopes, for in situ decay of 244Pu in individual 4.1- to 4.2-billion-year-old zircons from the Jack Hills region of Western Australia. Because of its short half-life, 82 million years, 244Pu was extinct within 600 million years of Earth's formation. Detrital zircons are the only known relics to have survived from this period, and a study of their Pu geochemistry will allow us to date ancient metamorphic events and determine the terrestrial Pu/U ratio for comparison with the solar ratio.

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