Accession Number : AD0451528


Title :   GAMMA DOSE IN A HOLE IN A UNIFORMLY CONTAMINATED PLANE: CONTRIBUTION BY GROUND PENETRATION,


Corporate Author : DEFENCE CHEMICAL BIOLOGICAL AND RADIATION LABS OTTAWA (ONTARIO)


Personal Author(s) : Clifford,C E


Report Date : 07 Dec 1960


Pagination or Media Count : 6


Abstract : In assessing the protection against gamma-radiation provided by a hole in a contaminated field it is necessary to consider the contribution to the total dose produced by gamma-radiation that penetrates the ground from contamination around the hole. As the diameter of the hole decreases this component becomes comparabl to the component due to radiation backscattered from the sky or skyshine. Usually the effect of lip penetration is ignored since it can be eliminated simply by removing the contamination within a few feet of the edge of the hole. However, when this contamination is not easily removed-for example, in the case of a foxhole if it was buried when the foxhole was dug-the ground penetration component could be a significant fraction of the total dose. This ground penetration component could also be important in the case of a corner basement shelter particularly if contamination was washed off the roof and piled up against the outer basement wall. (Author)


Descriptors :   *GAMMA RAYS , PENETRATION , CANADA , CONTAMINATION , GAMMA RAY SCATTERING , SHELTERS , DOSAGE , RADIATION EFFECTS , RADIATION MEASURING INSTRUMENTS


Distribution Statement : APPROVED FOR PUBLIC RELEASE