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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N. E. Zarubina^1,*, O. S. Burdo¹, L. P. Ponomarenko², O. V. Shatrova<sup>3

1</sup> Institute for Nuclear Research, National Academy of Sciences of Ukraine, Kyiv, Ukraine
² National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute", Kyiv, Ukraine
³ SE “UKRMETRTESTSTANDARD”, Kyiv, Ukraine

^*Corresponding author. E-mail address: nataliia.zarubina@gmail.com

Abstract: Studies of the ¹³⁷Cs content in fruit bodies of Suillus luteus in the territory of the Chornobyl exclusion zone and Kyiv region outside the zone were carried out during the period 1986 - 2020. It was found that the dynamics of ¹³⁷Cs activity in the mushroom can be described as a two-stage process. The first stage since 1986 was characterized by the annual increase in levels of specific activity of ¹³⁷Cs for the following 10 - 12 yrs. During the second stage, there has been a gradual decrease in concentrations of ¹³⁷Cs. The ecological half-life of ¹³⁷Cs in the mushroom at the second stage differs for different sampling sites. Its minimum values were noted at villages Yaniv and Novo-Shepelychy sampling sites inside the exclusion zone. The maximum of ¹³⁷Cs ecological half-life in Suillus luteus was observed on the Rzhyshchiv sampling site, which is the most remote from the Chornobyl Nuclear Power Plant outside the exclusion zone.

Keywords: mushroom, Suillus luteus, ¹³⁷Cs, Chornobyl (Chernobyl) NPP accident, Chornobyl (Chernobyl) exclusion zone, two stages.

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