81Kr Radiation Ages of Stone Meteorites

Details 81Kr Radiation Ages of Stone Meteorites 81Kr Radiation Ages of Stone Meteorites

Jan 1970

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1970natur.225..368r&link_type=abstract

Nature, Volume 225, Issue 5230, pp. 368 (1970).

Computer Science

Scientific paper

Marti1 and Eugster et al. (ref. 2 and unpublished work) recently discovered 81Kr, the first cosmic ray produced radionuclide heavier than the Ni-Fe group, in stone meteorites. By measuring only the isotopic composition of Kr, they evaluated the radiation ages of the meteorites as follows where Tr is the radiation age, λ81 is the decay constant of 81Kr = 3.25 × 10-6 yr-1 (refs. 3 and 4) and P(MKr) is the production cross-section of the nuclide in question. The exponential term becomes negligible if Tr>=2 m.y.

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