Mathematics – Logic
Scientific paper
Apr 1960
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1960natur.186..225k&link_type=abstract
Nature, Volume 186, Issue 4720, pp. 225-226 (1960).
Mathematics
Logic
Scientific paper
RECENT measurements1-6 of the natural isotopic composition of potassium have yielded values for the potassium-39/potassium-41 ratio ranging from 13.48 +/- 0.07 (Nier) to 13.96 +/- 0.05 (Omura and Morito). These results are not inconsistent with the presence of variations of 1 or 2 per cent in the potassium-39/potassium-41 ratio for different samples. Earlier measurements, many of which have been summarized by Reuterswärd3, cover an even wider range, and include numerous reports7-12 of differences of 1 per cent or more between the potassium-39/potassium-41 ratios of minerals, normal and cancerous human tissues, and other biological samples. More recently, Voshage and Hintenberger13 have shown that potassium of abnormal isotopic composition can be produced naturally as a result of the action of cosmic rays on iron meteorites.
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