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Science 2 July 1971:
Vol. 173. no. 3991, pp. 47 - 48
DOI: 10.1126/science.173.3991.47
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Articles

Alpha-Recoil Thorium-234: Dissolution into Water and the Uranium-234/Uranium-238 Disequilibrium in Nature

Kunihiko Kigoshi 1

1 Department of Chemistry, Gakushuin University, Mejiro, Tokyo, Japan

The rate of ejection of alpha-recoil thorium-234 into solution from the surface of zircon sand gives an alpha-recoil range of 550 angstroms. The alpha-recoil thorium-234 atoms ejected into the groundwater may supply excess uranium-234. In pelagic sediments, ejected alpha-recoil thorium-234 may contribute to the supply of mobile uranium-234 in the sedimentary column.


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Science. ISSN 0036-8075 (print), 1095-9203 (online)