Physics
Scientific paper
Mar 1970
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1970natur.225.1037m&link_type=abstract
Nature, Volume 225, Issue 5237, pp. 1037-1038 (1970).
Physics
1
Scientific paper
CLAYTON1 recently considered an apparent anomaly in the 187Re-187Os cosmochronology. He showed that this could be resolved if the half life of 187Re was significantly shortened in a stellar environment, and considered the solution to lie in the bound beta decay process, which is energetically feasible for the weak 187Re transition2. The ionization of Re in the outer solar convective zone increases the number of vacant bound states available, and Clayton suggests a reduction in the total 187Re half life from 43×109 yr to about 3×109 yr. It might therefore be expected that the 187Re/185Re ratio in the solar wind would be between one-half and one-third that observed terrestrially. Clayton proposed that the hypothesis could be tested by measuring the isotopic ratio of Re in the surface layer of an old part of the lunar regolith, and stressed that ``this measurement should eventually be undertaken if there is any reasonable chance of detection''. In this article I suggest a simple sensitive method to detect the expected isotopic anomaly.
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