Accession Number : AD0636788

Title :   MONTE CARLO CALCULATION OF SELF-SHIELDING BY ENCAPSULATED GAMMA RAY SOURCES.

Descriptive Note : Final rept. Jun 65-Aug 66 on Nuclear Radiation Shielding Studies.

Corporate Author : ILLINOIS UNIV URBANA

Personal Author(s) : Preiss, Kenneth

Report Date : AUG 1966

Pagination or Media Count : 49

Abstract : The dimensions of many encapsulated gamma ray sources used in experiments are not small compared with the mean-free-path-length of the radiation within them. For this reason, the emitted radiation will not be at the source energies only, but will be distributed in a continuous spectrum. Furthermore, if the source is cylindrical, the emitted radiation will not be isotropically distributed about the source. This report describes a calculation by the Monte Carlo method to find the energy and angular distributions of photons emitted from a cylindrical or spherical encapsulated source. Computed results are compared with experimental observations of energy and angular distribution, and show good agreement. Calculated spectra for typical cylindrical sources of Co-60 encapsulated in iron are given. (Author)

Descriptors :   (*MONTE CARLO METHOD, *SHIELDING), (*GAMMA RAYS, SHIELDING), PHOTONS, ENERGY, DISTRIBUTION, COMPUTER PROGRAMMING

Subject Categories : Numerical Mathematics
      Nuclear Radiation Shield, Protection & Safety

Distribution Statement : APPROVED FOR PUBLIC RELEASE