Abstract

A group of 10 female rats were administered orally 200 kBq/kg body weight of a CsCl-137 solution. After this administration the internal contaminated rats were examined daily by a whole body counter to obtain the retention characteristics of Cs-137 in these rates. From these characteristics the biological halflife of Cs-137 was calculated for each rat. Furthermore, the distribution, deposition and elimination of Cs-137 were examined in these rats.