Estimation of the ratio of Sr-90 and Cs-137 activities in the Chernobyl depositions in the territory of the Russian Federation

"Radiation and Risk". 2001. Vol. 12, pp.135-134


Ermilov A.P., Ziborov A.M.
Scientific Productive Association “VNIIFTRI”, Mendeleyevo, Moscow region
Ministry of Emergencies of Russian Federation, Moscow.


Correlative relationship between activities of 90Sr to 137Cs in condenses of the Chernobyl fallouts on April 26, 1986 was detected. The ratio was estimated with the use of data of the Institute of Global Climate and Ecology of the State Committee of Hydrometeorology and Russian Academy of Sciences. The data are derived from measurements of 90Sr, 137Cs and 239+240Pu in soil samples taken in Bryansk, Kaluga, Oriol and Ryazan regions in 1992. Activity of 90Sr from the condense was found to be governing factor when specific activity of 137Cs was > 2000 Bq/kg.

Key words
Activity, 90 Sr, 137Cs, correlation ratios, condensation component, Chernobyl precipitation, activity measurements, soil samples, specific activity.


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