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Depth migration of 137 Cs and 90 Sr was studied in soils of reference sites that have different environmental characteristics and are situated in all four radiogeochemical regions of Belarus.
The gamma-dose rates in air were measured in time at various reference sites which had different environmental characteristics. It appears that the dose rate had fallen off from its peak value and more or less stabilized by the end of 1990. The model presented describes this behaviour and fits the experimental data well. All the study sites are subdivided into four groups according to the dose-decrease...
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