Accession Number : AD0757039


Title :   The Dependence of Miniature Pig Performance Decrement upon Gamma Ray Dose Rate.


Descriptive Note : Scientific rept.,


Corporate Author : ARMED FORCES RADIOBIOLOGY RESEARCH INST BETHESDA MD


Personal Author(s) : George,R. E. ; Chaput,R. L. ; Barron,E. L.


Report Date : DEC 1972


Pagination or Media Count : 21


Abstract : Trained miniature pigs were irradiated in a nuclear reactor-produced gamma ray field. Dose rates at the midline of the brain were 470, 1000, 1500, 2000, or approximately 10,000,000 (pulsed irradiation) rads/minute. Doses ranged from 1500 to 14,700 rads. Postirradiation performance data were used to calculate for each dose rate the most probable dose that would cause 50 percent of the animals to perform unsatisfactorily (ED50). The miniature pigs' response varied markedly with dose rate at less than 2000 rads/minute; ED50's were 10,570, 7780, 2500, and 2380 rads, respectively, for 470, 1000, 1500, 2000, and 10 to the 7th power rads;minute. Survival times, however, did not appear to be dependent upon dose rate. (Author)


Descriptors :   (*RADIATION DOSAGE, *PERFORMANCE(HUMAN)), (*RADIATION EFFECTS, PERFORMANCE(HUMAN)), GAMMA RAYS, PARTIAL BODY IRRADIATION, DOSE RATE, SWINE, EXPERIMENTAL DATA


Subject Categories : RADIOBIOLOGY


Distribution Statement : APPROVED FOR PUBLIC RELEASE