This study is devoted to the estimation of radionuclides global fallout levels in the soils of Commonwealth of Independent States (CIS) and Eastern Europe territory as a result of nuclear explosions. 58 standard soil samples were used, which were selected in different soil and climatic areas of the territory of CIS and Eastern Europe in 1978-2018. All samples were measured by gamma spectrometry. Determination of plutonium isotopes and strontium was performed according to the method of the joint determination of these radionuclides from one sample. IN the samples considered in this work, the content of Co, Eu, Eu was below the detection limits, which were 0.4; 1.0 and 1.0, respectively. Natural radionuclides analysis results indicated that the obtained samples are typical soil samples without its abnormal contents. The content of Cs, Sr, Pu in a 20 cm soil layer due to global fallout is (3.9 ± 1.7), (2.2 ± 0.8), (0.18 ± 0.08) Bq/kg respectively, which considering the distribution of these radionuclides by depth and average soil density is (1.2 ± 0.5) kBq/m for Cs, (0.42 ± 0.15) kBq/m- Sr and (55.0 ± 24.0) Bq/m- Pu. The isotopic ratiosCs/Sr and Cs/Pu for the territory of CIS and Eastern Europe are at the level (2.0 ± 0.71) and (25 ± 15), respectively.
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