Scope of Pb-Sn binary alloys as gamma rays shielding material

An attempt has been made to prepare binary alloys of Pb and Sn in different compositions. The physical properties of the prepared alloys viz. dimensions and density has been measured. Further, different shielding parameters: effective atomic number.(Z(eff)), electron density (N-e), mean free path (mfp) were computed for the prepared Pb-Sn binary alloys in the wide energy range from 1.0 keV to 100.0 GeV. The variation of effective atomic number, electron density, mean free path for the selected alloys with incident photon energy has been analyzed. The work has been extended to compute exposure buildup factor (EBF) using five parametric geometric progression (GP) fitting method in the energy range 0.015-15.0 MeV and up to the penetration depth of 40 mfp. Further, the variation of exposure buildup factor with incident photon energy as well as penetration depth for the selected alloys has been investigated. (C) 2016 Elsevier Ltd. All rights reserved.