Accession Number:

AD0716320

Title:

Backscattering for Gamma Rays from a Point Source Near a Concrete Plane Surface,

Descriptive Note:

Corporate Author:

ILLINOIS UNIV URBANA ENGINEERING EXPERIMENT STATION

Personal Author(s):

Report Date:

1964-01-01

Pagination or Media Count:

95.0

Abstract:

Backscattering factors, as fractions of a direct dose rate in a vacuum, are obtained for point sources of gamma radiation, specifically cesium-137 and cobalt-60, placed near a plane interface between vacuum and concrete. The method derived is based on application of albedo principles, using the Chilton-Huddleston formulation for albedo. Previously published values of parameters for the Chilton-Huddleston formula are not used but a new set, believed to be better, is derived. The results are considered practically applicable to air-concrete or air-ground interface situations, provided the distances of source to detector, source to interface, and detector to interface are greater than a mean-free-path of the source gamma radiation in the concrete or ground but substantially less than that in air. Author

Subject Categories:

  • Nuclear Radiation Shielding, Protection and Safety
  • Nuclear Physics and Elementary Particle Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE