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.

KEYWORDS:

• skyshine
• gamma radiation
• line-beam response function
• Monte Carlo method
• EGS4
• MCNP
• single-scattering method
• G33-GP2
• distance
• photon beams
• energy dependence