234 Th--- 238 U radioactive disequilibrium in the surface layer of the ocean

Details 234 Th--- 238 U radioactive disequilibrium in the surface layer of the ocean 234 Th--- 238 U radioactive disequilibrium in the surface layer of the ocean

Feb 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975gecoa..39..205m&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 39, Issue 2, pp.205-212

Physics

7

Scientific paper

234 Th produced from 238 U within sea water was found to be in radioactive disequilibrium with respect to its progenitor nuclide 238 U in the surface layer of the ocean. The median value for 234 Th / 238 U activity ratio is 0.80 in the upper 200 m layer. A box-model calculation gives a removal residence time of thorium of about 0.38 yr. This suggests that 234 Th is scavenged from the surface layer by the uptake of thorium by biota.

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