Gamma-ray spectrometry application for detection of anthropogenically uranium-polluted soil

In this article are considered detection methods of anthropogenic uranium component in the soil on the basis of the relational analysis of 238U specific activity to the specific activity of other natural radionuclides. Significant shift in the balance between 226Ra and 238U allows to make the assumption about the existence of external causes of modification in the radionuclides specific activity in the decay chain. In the cases when specific activity of 235U is reliably determined anthropogenic uranium supply is confirmed by a significant difference in 238U/235U ratio from 21.7. There are several soil samples with low-activity of 235U, in which 238U/232Th, 238U/40K ratio's analysis allows to confirm the estimated additional uranium content. Formation length of anthropogenic soil pollution can be determined by 137Cs specific activity.