Accession Number:

AD0736176

Title:

Comparison of Dose Patterns in a Miniature Pig Exposed to Neutron and to Gamma Radiation

Descriptive Note:

Technical note

Corporate Author:

ARMED FORCES RADIOBIOLOGY RESEARCH INST BETHESDA MD

Personal Author(s):

Report Date:

1971-10-01

Pagination or Media Count:

23.0

Abstract:

Depth-dose patterns were compared for significantly different mixtures of incident radiations from the AFRRI-TRIGA nuclear reactor. Neutron to gamma ray tissue kerma ratios of 101 and 0.061 were used for exposure of a miniature pig cadaver. Measurement of the dose distribution patterns across the brain and across the intestinal regions was performed employing the paired ionization chamber technique. Placement of the dosimeters within the cadaver was verified by radiography and by dissection of the specimen. For the high neutron field, the ratio of neutron to gamma ray doses for a unilateral irradiation ranged from 3.2 at the entrance to the brain to 1.9 at the brain exit. The ratio incident on the head was measured to be 8.5. Across the intestinal region, the neutron to gamma ray dose ratio for a bilateral irradiation ranged from 1.5 to 0.8. For the high gamma ray field, the incident neutron to gamma ray ratio was 0.06. For this field, the dose pattern is substantially that produced by a photon field containing no neutrons.

Subject Categories:

  • Radiobiology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE