Comparison of Line Beam Response Function for Gamma-ray Skyshine Analysis Based on Single Scattering Method with the Monte Carlo Calculations

Abstract

A simple calculation method for estimating gamma-ray skyshine dose rates has been developed on the basis of the line beam response function (LBRF). The new data of LBRFs were generated by the single scattering with point kernel technique (single-scattering method). These resulting LBRFs were compared with the EGS4 and MCNP Monte Carlo calculations. The values of the new LBRFs for the large emitted angle become smaller than the LBRFs obtained with the Monte Carlo calculations with an increase of the distance from the source. This discrepancy increases with an increase of the photon energy.

Validity of the Four-Parameter Empirical Formula in Approximating the Response Functions for Gamma-ray, Neutron, and Secondary Gamma-ray Skyshine Analyses

“…That is, CBRF R(E, θ, x) is obtained by integrating the LBRF R(E, , x) within the boundary satisfied by Eq. (11). Therefore, the behavior of the CBRF attenuation cannot be treated with a clear method, such as that for the LBRF.…”

“…A fixed sin θ corresponds to various and φ restricted by Eq. (11). That is, CBRF R(E, θ, x) is obtained by integrating the LBRF R(E, , x) within the boundary satisfied by Eq.…”