Incoherent scattering in Pb, Sn and Cu at three gamma ray energies

DIfferential incoherent scattering cross sections for 279, 662 and 842 keV photons in lead, tin and copper at three scattering angle, 20, 30 and 40 degrees , have been measured. A photon counter with a uniform spectral sensitivity was used for the detection of the scattered photons. The scattering geometry used in this experiment was also of a special type, namely the surface of revolution geometry, which has several advantages over the conventional ring geometry. From the measured differential cross sections the corresponding incoherent scattering functions were estimated and were in good agreement with theoretical values.