Gamma-Ray Transmission Through Inhomogeneous Layers

Experiments have been carried out to determine the difference between gamma ray absorption man inhomogeneous layer of material, composed of spherical heavy metal particles (tungsten) in a nonabsorbing matrix, and absorption in a uniform heavy metal sheet of the same average thickness. The results can be used to evaluate a function describing the distribution of absorber thickness at different points on the layer. The gamma rays used ranged in energy from 35 to 122 keV.