The Lethal Effect of Acute X Irradiation on Rats as a Function of Age

Abstract
Whole body irradiation was delivered in a single dose of 250 kvp X-rays to 16-month-old and to 6-month-old female rats. The LD50 for the 16-month-old-groupwas 600 r, for the 6-month-old-group, 715 r.