Β-ACTIVITY DISRTIBUTION IN MOUSE-LIKE RODENTS INHABITING THE EAST URALS RADIOACTIVE TRACE
The authors represents data on body-burden β-activity in mouse-like rodents from the East Urals Radioactive Trace (EURT) with the initial surface contamination density 0.074 to 18.5 MBq/m 2 (2 to 500 Ci/km 2) in terms of 90Sr. The great variability of individual indices may result from significantly different contamination levels on animal trapping places. The regularities of 90Sr ( 90Sr + 90Y) deposition in skeletons known for laboratory mice were confirmed. Distinctions in accumulation may be due to morphophysiological peculiarities of the skeletons. Correlations between β-activities in the skeleton, the gastrointestinal tract (r = 0,882, p<0,001) and the whole body (r = 0.998, p<0.01) are shown. However, to compare β-activities accumulated in the whole body and the skeleton one should know the contribution of the external radioactive contamination of skin to β-activity.