EFFECTS OF THE GROUND ON THE GAMMA DOSE FROM DISTRIBUTED 137Cs SOURCES

Authors
  1. Clifford, C.E.
Corporate Authors
Defence Chemical Biological and Radiation Labs, Ottawa ONT (CAN)
Abstract
The effects on the exposure dose of different ground materials and of a ground cover similar to snow were measured for a smooth surface contaminated with 0.66-MeV gamma sources (137Cs). Measurements were made also of the effect of a rough surface on the exposure dose. For uniform contamination of a smooth ground, agreement within 10% was obtained with theoretical dose distributions based on infinite-medium calculations. However, even moderate ground roughness reduced the dose at a detector height of 1 meter by a factor of two below its value for a smooth surface. Failure to specify the effect of ground roughness on smooth field calculations as a function of the surface roughness appeared to be the largest source of error in the calculation of exposure dose.
Report Number
DCBRL-442 — Reprint; Previously accessioned as DSIS 65/1719
Date of publication
15 Jul 1964
Number of Pages
12
Reprinted from
Canadian J of Physics, vol 42, 1964, p 2373-2383
DSTKIM No
92-03834
CANDIS No
127167
Format(s):
Hardcopy;Originator's fiche received by DSIS

Permanent link

Document 1 of 1

Date modified: