Accession Number : AD0678365
Title : ACUTE MORTALITY OF MICE AND RATS EXPOSED TO MIXED GAMMA-NEUTRON RADIATIONS OR TO X RAYS
Descriptive Note : Scientific rept.
Corporate Author : ARMED FORCES RADIOBIOLOGY RESEARCH INST BETHESDA MD
Personal Author(s) : Strike, T. A. ; Seigneur, L. J. ; Stanley, R. E.
Report Date : APR 1968
Pagination or Media Count : 28
Abstract : Mortality data for C57BL mice and Sprague-Dawley rats were collected as a part of the program to biologically characterize AFRRI-TRIGA reactor radiations and to provide reference information for future studies. Unilateral whole body exposures to mixed gamma-neutron radiations from the reactor or to 250 kVp x rays were carried out over a range of midline tissue doses from 370 to 875 rads. The 30-day median lethal doses were calculated to be 589 and 432 rads for mice exposed to the x rays and to the reactor radiations, respectively. The corresponding values for the rat exposures were 740 and 434 rads. Using the LD50/30 values as the end points for comparison, the reactor radiations were 1.4 and 1.7 times more effective in mice and rats, respectively, than were the x rays. The survival times of the mice and rats exposed to reactor radiations were significantly less than those of the animals exposed to similar doses of x rays.
Descriptors : *RADIATION EFFECTS , *RODENTS , GAMMA RAYS , MICE , WHOLE BODY IRRADIATION , DOSE RATE , LETHAL DOSAGE , NEUTRONS , FAST NEUTRONS , X RAYS , RATS , SURVIVAL(PERSONNEL)
Subject Categories : BIOLOGY
Distribution Statement : APPROVED FOR PUBLIC RELEASE