The experimental data of radiochemical determination of the long-lived transuranium radionuclides in the biological samples taken in the 30-km zone of the ChNPP are present. Aspects of transfer of the 137Cs, 90Sr, 239+240Pu and 241Am in the soil-to-mushroom, soil-to-plant are discussed. It has been found that radioactivity ratio 241Am/239+240Pu in the plant is significantly higher than in the soil.
Агеев et al. (Sat,) studied this question.