241Pu/239+240Pu ratios in polar glaciers

Details 241Pu/239+240Pu ratios in polar glaciers 241Pu/239+240Pu ratios in polar glaciers

Jul 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981e%26psl..54..239k&link_type=abstract

Earth and Planetary Science Letters, Volume 54, Issue 2, p. 239-247.

Physics

6

Scientific paper

The analyses of plutonium isotopes in dated strata of polar ice sheets indicate that the 241Pu/239+240Pu activity ratio produced in the U.S.-dominated nuclear tests during the 1950s was about 26, while that in the U.S.S.R.-dominated weapons tests in the early 1960s was between 12 and 14. This difference provides time horizons for sedimentary deposits. Further, the 239Pu/240Pu ratio may show a similar difference in fallout values from these two periods of weapons testing and may provide an additional, and perhaps more sensitive, chronology for sediments.

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