Abstract
Abstract The gamma ray exposure buildup factors (EBF) of xWO3:(70-x)Gd2O3:30B2O3 system (where x=40, 45, 50, 55 and 60 mol%) have been calculated in the energy region 0.015–15 MeV up to a penetration depth of 40 mfp (mean free path). The five parameter geometric progressions (G-P) fitting method has been used to compute exposure buildup factor values. Variation of exposure buildup factors with incident photon energies and penetration depth have been studied. It was found that EBF values were higher in the intermediate energy region, for all glass system. Moreover, tungsten gadolinium borate glass of 40 mol% WO3, was found to present the lowest EBF values, hence it is excellent gamma ray shielding material. The obtained results in this paper show that these glasses can be used as radiation shielding materials
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