Effects of X-Ray and Neutron Dose Fractionation on the Mouse Testis

Abstract
Male albino mice were irradiated with single and fractionated doses of 8-Mev X-rays or fast neutrons, and the radiation damage to the testes was assessed from the weight loss of the organs. A relative biological effect (RBE) of neutrons against X-rays of 4.85 [plus or minus] 0.31 (0 ) was found at 28 days after single-dose irradiations. Splitting of the doses into 2 equal fractions given 4 or 7 days apart did not significantly change the RBE value.