The present article describes changes in specific activities and fluctuations in the ratio of natural ⁴⁰K and artificial ¹³⁷Cs radionuclides in soil samples taken from different places of Lithuanian territory. The samples of soil have been selected from the districts polluted after the accident in Chernobyl nuclear plant performing nuclear testing operations. The study has established the main physical and chemical properties of soil samples and their impact on the concentration of ⁴⁰K activities. ¹³⁷Cs/⁴⁰K specific activities in soil have been observed under the dry weight of the sample that varied from 0.0034 to 0.0240. The results of the study could be used for establishing and estimating ¹³⁷Csand ⁴⁰K transfer in the system “soil-plant”.

Article in Lithuanian