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Science 4 June 1965:
Vol. 148. no. 3675, pp. 1325 - 1328
DOI: 10.1126/science.148.3675.1325
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Articles

Half-Lives of Argon-37, Argon-39, and Argon-42

R. W. Stoenner 1, O. A. Schaeffer 1, and S. Katcoff 1

1 Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973

The half-lives of three argon isotopes have been carefully determined, with the following results: Ar37, 35.1 ± 0.1 days; Ar39 269 ± 3 years; Ar42, 32.9 ± 1.1 years. By combining the Ar42 value with earlier data, a cross section of 0.5 ± 0.1 barn is calculated for the reaction, with thermal neutrons, Ar41(n,ggr)Ar42.


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