Journal
RADIATION EFFECTS AND DEFECTS IN SOLIDS
Volume 173, Issue 11-12, Pages 900-914Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/10420150.2018.1505890
Keywords
Photon; G-P fitting; attenuation; MCNPX; Geant4
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The photon attenuation coefficients for the rocks (Feldspathic basalt, Compact basalt, Volcanic rock, Pink granite, Sandstone and Dolerite) have been investigated using MCNPX and Geant4 codes for photon energies 122, 356, 511, 662, 1170, 1275 and 1330 keV. Comparison of the simulation and experimental results of mass attenuation coefficients is presented. The exposure buildup factors also have been calculated with the help of the G-P fitting method. The comparison showed reasonable agreement between the simulated and experimental data for all rocks. The results show that sandstone has the highest mean free path as well as exposure buildup factor which signifies that sandstone requires a larger thickness for protection from photons.
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