The r-process and uranium-thorium cosmochronology

Details The r-process and uranium-thorium cosmochronology The r-process and uranium-thorium cosmochronology

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001asthe..94..361w&link_type=abstract

The Astronomical Herald (ISSN 0374-2466), Vol. 94, No. 8, p. 361 - 370 (2001)

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Cosmochronology

Scientific paper

The long-lived radioactive nuclei, uranium and thorium in the atmosphere of ultra-metal-poor stars in the Galactic Halo, are the "cosmochronometers" working over the Galactic history during more than 10 billion years. The dating with the use of thorium since finding an r-process enriched star several years ago and the uranium-thorium chronology since the discovery of uranium in another r-process star in the beginning of the new century provide us a unique method for determining the age of the universe. I will review the reliability of the dating technique with uranium and thorium, and speculate some progress in the near future.

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