Isotopic composition of plutonium in the bottom deposits of the Norwegian sea and greenland sea and identification of the sources of contaminationheader

摘要

The results of measurements of the isotopic atomic ratios~238Pu/~239~Pu, 240~Pu/239~Pu, 241~Pu/239~Pu, 242~Pu/239~Pu in samples of bottom deposits are presented. The role of the main sources of plutonium contamination of the region is examined. It is shown that the contribution of the a activity of industrial plutonium (238-240~Pu) in bottom sediments from the European reprocessing plants, mainly, Sellafield (Great Britain), on the background due to global fallouts is 20 to 55/100 of the total a activity and 70-95/100 for the β activity (241~Pu).