RADIATION PHYSICS AND CHEMISTRY, cilt.78, sa.9, ss.751-759, 2009 (SCI-Expanded)
Total mass attenuation coefficients, mean free paths (MFP), half-value (HVT) and tenth-value (TVT) thicknesses of Portland cement and three mixtures have been Calculated in function of the energy from I keV to 100 GeV. Both in the low- and high-energy region there were significant variations in those parameters where photoelectric process and pair production partially dominates, respectively. In general, the attenuation parameters were found to vary with chemical composition, density of given material and photon energy. (C) 2009 Elsevier Ltd, All rights reserved.