Abstract
The shielding of γ-rays and fast neutrons by concrete has been studied for concretes containing different lime/silica ratios. Calculations were carried out for six different concrete samples. The total mass attenuation coefficients (
μ/
ρ, cm
2
g
−1) have been computed at photon energies of 1
keV to 100
GeV using the personal computer software package WinXCom. Also the macroscopic effective fast neutron removal cross-sections (Σ
R
, cm
−1) have been calculated using MERCSF-N program and the removal cross-section database for all required elements. The obtained results showed that the lime/silica ratio of concrete has significant and insignificant effects on
μ/
ρ and Σ
R
values, respectively.