“…Accurate knowledge of the angular distribution of the number and energy albedos of the backscatter photons from different materials is important in desiging reactor shields and other shield calculation in nuclear installations. The backscattering of gamma rays from shield materials has been the subject of extensive experimental investigation by many studies (Biswas, Sinha, & Roy, 1979, 1980Fujita, Kobayashi, & Hyodo, 1964;Pozdneyev, 1967;Steyn & Andrews, 1967).…”