Ядерна фізика та енергетика Nuclear Physics and Atomic Energy   ISSN: 1818-331X (Print), 2074-0565 (Online)   Publisher: Institute for Nuclear Research of the National Academy of Sciences of Ukraine   Languages: Ukrainian, English   Periodicity: 4 times per year   Open access peer reviewed journal

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Yu. V. Khomutinin<sup>1

1</sup>Ukrainian Institute of Agricultural Radiology, National University of Life and Environmental Sciences of Ukraine, Kyiv, Ukraine

Abstract: The problems of reliable determination of activity of ¹³⁷Cs, ⁹⁰Sr, ^239,240Pu and activity ratio ¹³⁷Cs/⁹⁰Sr in the soil samples containing the hot particles are considered. It is shown that the soil samples have volumetric heterogeneity of contamination, which can not be eliminated by their homogenization. Distribution of the possible values of the sample specific activity is described by the lognormal regularity. It is proposed the method for calculation of a minimal necessary number of the soil samples for the estimation of median of the measured value at the fixed relative uncertainty.

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