Calculation of the exposure buildup factors for x-ray photons with continuous energy spectrum using Monte Carlo code

In this study, the exposure buildup factors for
two x-ray continuous energy spectra (bremsstrahlung) with 5 and 10 MeV endpoint energies were
calculated up to depths of 10 mfp of water. It was observed that there is a large difference between
the obtained exposure buildup factors due to the monoenergetic and continuous energy spectrum gamma
sources. The calculation results show that the relative differences in 5 MeV energy for 1 mfp to 10
mfp are 114% to 44%, respectively, and also the relative differences in 10 MeV energy for 1 mfp to
10 mfp are 87% to 38%, respectively. Actually, the main purpose of this paper is to illustrate the
fact that there is a significant difference between the exposure buildup factors due to the
continuous ...

Source: Journal of Radiological Protection - January 18, 2018 Category: Physics Authors: Mustafa Mohammad Rafiei and Hossein Tavakoli-Anbaran Source Type: research