Direct Determination of 90Sr Body Burden in Man

Full text: The danger of the internal exposure caused by caesium and strontium is still actual for Belarus. It is known that strontium-90 does not disappear throughout a human life and is eventually accumulated in living beings. For this reason, there is an urgent necessity for assessment of consequences of the 90S accumulation in children and adolescents. Direct detection of beta particles leaving the human body is discussed for determination of the 90Sr body burden. The special measuring transducer was used to measure beta radiation as well as gamma one. The results of theoretical and experimental investigations, which simulate measurements of 90Sr in man, are presented. Even if other radionuclides are present in the body this method makes it possible to determine the low 90Sr body burden (about 300-500 Bq per body). (author)