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Radioprotection (1)

EDPS Sciences - Radioprotection (1)

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Half-lives of self-purification for various isotopes in soils of the Chernobyl Exclusion Zone
J. Barescut, M. Bondarkov, Yu. Ivanov, D. Bondarkov, S. Gaschak, A. Maksimenko, R. K. Chesser, B. Rodgers, M. Zheltonozhskaya
Journal:

Radioprotection / Volume 44 / Issue 5 / 2009

Published online by Cambridge University Press:

06 June 2009, pp. 909-911

Print publication:

2009
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During 2001–2002 we investigated current contamination of soils in several places in the Chornobyl zone. We have measured the content of alpha emitting isotopes Pu, 241Am, 154,155Eu, 90Sr, and 137Cs in layers of soil up to the depth of 30 cm. By including the two mechanisms of migration: convection and diffusion in our model, we were able to estimate the ecological and effective half-lives of self-purification processes for these layers of soil. Effective half-lives vary from 20 to 400 years dependent upon the type of soil and the isotopes.