Abstract
The linear dependence of the yield of unstable chromosomal aberrations in human lymphocytes on the dose of prolonged external and/or internal irradiation of peripheral blood samples by 137Cs in the dose range of 0.09 - 0.54 Gy in vitro is presented. The higher cytogenetic efficiency of internal 137Cs irradiation is shown in comparison with external. It is shown that the cytogenetic efficiency of 137Cs in blood contamination is caused by influence on cells not only in the mitotic rest phase but during proliferation, within intracellular radioactivity through their cultivation. It is proposed to use the presented dose dependences of the yield of chromosomal aberrations in lymphocytes in vitro for human biological dosimetry during radiation accidents associated with prolonged external exposure or 137Cs incorporation to the body as a supplement to the results of physical dosimetry.
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