Accession Number : AD0742076
Title : Neutron Effectiveness for Causing Incapacitation in Monkeys
Descriptive Note : Scientific rept.
Corporate Author : ARMED FORCES RADIOBIOLOGY RESEARCH INST BETHESDA MD
Personal Author(s) : Thorp, J W ; Young, R W
Report Date : Apr 1972
Pagination or Media Count : 21
Abstract : Fifty-eight male monkeys (Macaca mulatta) were trained by shock avoidance conditioning to work a simultaneous visual discrimination problem. Trained subjects were irradiated in either a nuclear reactor-produced neutron field (incident neutron to gamma ray ratio of about 10) or a similarly produced gamma ray field (incident neutron to gamma ray ratio of about 0.1). In all exposures the midbrain dose rate was about 2000 rads/minute. The midbrain dose most likely to cause early transient incapacitation (ETI) in 50 percent of the irradiated subjects was determined. The signs and symptoms of ETI were the same whether the monkey received gamma or neutron radiations.
Descriptors : *RADIATION EFFECTS , DOSE RATE , EXPERIMENTAL DATA , GAMMA RAYS , MONKEYS , NEUTRON REACTIONS , PERFORMANCE(HUMAN) , RADIATION DOSAGE
Subject Categories : Radiobiology
Distribution Statement : APPROVED FOR PUBLIC RELEASE