Abstract

After whole body exposure of goats to fission neutrons the plasma 24Na concentration was found to be linearly correlated with dose over the range zero to 2,400 rads. The slope of the regression line for males and females was different, probably because of sex differences in either spatial distribution of body sodium or tissue dose. Variation in body weight had a smaller but statistically significant effect. For goats exposed under similar geometrical conditions the standard deviation of the dose estimate derived from plasma 24Na measurements was ±8 per cent. Although the relation between dose and sodium activation was the same for unilateral and bilateral irradiation, the biological outcome for the same dose was not identical.

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