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Letters to Nature
Nature 216, 352-353 (28 October 1967) | doi:10.1038/216352a0
Polonium-210 in Marine Plankton
L. V. SHANNON & R. D. CHERRY
- Division of Sea Fisheries, Sea Point, South Africa.
- Department of Physics, University of Cape Town.
Abstract
THE occurrence of polonium-210 and its precursor lead-210 in the natural radiation environment has been studied increasingly during the last decade. Radon emanating from materials in the Earth's crust introduces lead-210 into the atmosphere and there is then a natural fallout of lead-210 and its daughters. These nuclides are then incorporated into natural samples in the hydrosphere and lithosphere. Papers by Burton and Stewart1, Patterson and Lockhart2 and Peirson et al.3 provide data for lead-210 and polonium-210 in air and in rainwater. Hill4 has discussed in detail the concentrations of polonium-210 and lead-210 in foodstuffs, tobaccos and human tissues from various environments, and additional data have been provided by Hill5, Holtzmami6, Little and McGandy7 and others.
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