SR-90 AND PU-239-238 AM-241 IN SOME SAMPLES OF MUSHROOMS AND FOREST SOIL FROM POLAND(240 PU)

Strontium-90, plutonium and americium activity concentrations in a few samples of forest soils, some species of mushrooms and fem leaves hav e been determined. These results are compared with cesium activity con centrations in the same materials obtained in a previous work. Radioch emical procedures are described. The origin of the contamination (Cher nobyl accident or nuclear test explosion release) is discussed. The Sr -90 activity concentration ranges from 0.6 Bq/kg (mushroom samples) to 48.4 Bq/kg (fern leaves). For Pu-239+240, it ranges from not detected above background (mushrooms, fern) to 10.8 Bq/kg (humus layer of fore st soil). The maximum concentration of Am-241 is found to be 2.4 Bq/kg (humus sample) and for Pu-238 it is 0.85 Bq/kg (also in the humus sam ple).