Accession Number : AD0294104

Title :   A SEMIEMPIRICAL FORMULA FOR DIFFERENTIAL DOSE ALBEDO FOR GAMMA RAYS ON CONCRETE

Corporate Author : NAVAL CIVIL ENGINEERING LAB PORT HUENEME CALIF

Personal Author(s) : CHILTON,A.B. ; HUDDLESTON,C.M.

Report Date : 16 NOV 1962

Pagination or Media Count : 19

Abstract : A semiempirical formula is developed which yields values for the differential dose albedo of gamma rays on concrete. Gamma rays of incident energies 0.2, 0.5, 1.0, 2.0, 4.0, 6.0, and 10.0 Mev are considered. Results of the formula are compared with values derived from Monte Carlo calculations for the backscattering of gamma rays from a semi-infinite slab of concrete. Results show that a two-parameter formula gives satisfactory agreement with the Monte Carlo calculations. The principal assumption involved in the theoretical analysis is that the actual reflection process can be approximated by two terms, one involving a single Compton scattering event, and the other involving isotropic scattering. (Author)

Descriptors :   *CONCRETE, *GAMMA RAYS, ALBEDO, COMPTON SCATTERING, DOSIMETERS, ENERGY, NUMERICAL METHODS AND PROCEDURES, SCATTERING, SHIELDING

Distribution Statement : APPROVED FOR PUBLIC RELEASE