Isotopic composition of the radioactive fallout in Eastern Poland after the Chernobyl accident

Abstract After the Chernobyl accident the radioactivity of air, soil, dust and grass samples, originating from Eastern Poland was investigated by gamma-ray techniques. The isotopic composition of the radioactive fission products in these samples was determined. By combining the obtained results with...
Ausführliche Beschreibung

Abstract After the Chernobyl accident the radioactivity of air, soil, dust and grass samples, originating from Eastern Poland was investigated by gamma-ray techniques. The isotopic composition of the radioactive fission products in these samples was determined. By combining the obtained results with those from other groups the evolution of the activity ratio in air for some isotopes was gathered. It is suggested that this evolution may be related to the differences in the deposition velocities of various elements. The distributions of the activity ratio in the measured samples indicate different transport and deposition properties for the volatile and nonvolatile fission products. It is concluded that the main part of the released nonvolatile products was deposited in the form of hot particles. Ausführliche Beschreibung