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Science 14 September 1962:
Vol. 137. no. 3533, pp. 851 - 853
DOI: 10.1126/science.137.3533.851
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Articles

Iodine-129: Its Occurrenice in Nature and Its Utility as a Tracer

R. R. Edwards 1

1 Nuclear Science and Engineering Corporation, P.O. Box 10901, Pittsburgh 36, Pennsylvania

Natural production rates of the 16 million-year iodine-129 from spontaneous fission and from cosmic-ray reactions are estimated to contribute a steady-state concentration of more than 10-14 gram of I129 per gram of I129 to the hydrosphere, the atmosphere, and the biosphere. These concentrations are expected to be detectable by neutron-activation analysis in natural materials that concentrate iodine. Substantial additional contributions have been made by fission-produced I129 in fallout, serving as an intrinsic tracer for natural iodine kinetics. Iodine-129 activation analysis has advantages as a tracer technique.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Iodine-129 in Terrestrial Ores.
B. Srinivasan, E. C. Alexander Jr., and O. K. Manuel (1971)
Science 173, 327-328
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