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Presence of U and Pu in soils from Southern Hemisphere.

08:00 EDT 7th August 2018 | BioPortfolio

Summary of "Presence of U and Pu in soils from Southern Hemisphere."

U, Pu and Pu are present in soils mainly as a result of the local- and global-fallout from the atmospheric nuclear weapons tests carried out mainly in the 1950's and 1960's. In this work we provide new data on the presence of U and Pu in surface soils (i.e. up to 5 cm depth) from Chile and Africa. The results were obtained by low-energy Accelerator Mass Spectrometry (AMS). In the case of the Chilean samples, U/Pu atom ratios show a high variability and are in general higher than the reported value for the global fallout in the Northern Hemisphere, ranging from 0.2 to 1.5. The U atomic concentrations range from 3.5 × 10 to 9.1 × 10 atoms/g, and are at least two orders of magnitude lower than the reported values in the Northern Hemisphere. The measured Pu/Pu atom ratio in soils from South-Africa and Mozambique are of about 0.17, in agreement with the expected one for global-fallout at those coordinates. To best knowledge of the authors the present work is the first publication on U concentrations and U/Pu atom ratios in soils from South-America and Africa.

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This article was published in the following journal.

Name: Journal of environmental radioactivity
ISSN: 1879-1700
Pages: 478-484

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