COMPARISON OF DOSE PATTERNS IN A DOG EXPOSED TO NEUTRONS AND TO X RAYS

Dose distributions with depth in a dog cadaver and in a cylindrical phantom have been obtained for 1 Mvp transmitted X rays and for mixed neutron and gamma radiation from a reactor. The ratio of neutron to gamma dose was 4:1 at the surface of the dog. Measurement of the gamma or X-ray dose was made...

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Bibliographic Details
Main Authors: Wingate, Catharine L, Page, Norbert P, Ainsworth, E John
Format: Report
Language:English
Subjects:
DOGS
DOSE RATE
DOSIMETERS
DOSIMETRY
GAMMA RAYS
HEALTH PHYSICS
NUCLEAR REACTORS
PENETRATION
RADIATION DOSAGE
Radiobiology
TISSUES(BIOLOGY)
WHOLE BODY IRRADIATION
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Summary:Dose distributions with depth in a dog cadaver and in a cylindrical phantom have been obtained for 1 Mvp transmitted X rays and for mixed neutron and gamma radiation from a reactor. The ratio of neutron to gamma dose was 4:1 at the surface of the dog. Measurement of the gamma or X-ray dose was made using LiF thermoluminescence dosimeters, while neutron dose was obtained from the activation of small sulfur pellets, with suitable calibrations. Placement of dosimeters was verified by roentgenography. Penetration of the 1 Mvp X rays is considerably higher than that of the reactor neutrons, whose effective energy is about 1 Mev, and does not appear to differ significantly in various cross sections of the body as was found for 250 Kvp X rays by others. For the reactor beam administered unilaterally the energy deposition in the dog is strongly asymmetric as shown by isodose configurations for the neutron and gamma components. However, only minor variations were found in the depth dose curves for the phantom and different sections through the dog cadaver, namely, head, chest and abdomen, in spite of the differences in composition and density. (Author)