Simulation of Gamma-ray Multiple Scattering in Rocks

The main objective of the gamma-gamma ray logging is the determination of rock porosity by measuring the bulk density of the rocks. The principle of measurement is based on the physical phenomena of gamma-ray scattering and absorption. It seems difficult to know analytically the behavior of gamma-ray multiple scattering in rocks. A calculation on the transmission and back scattering of gamma-ray in rocks may well be done by application of the Monte Carlo method, because these phenomena are specified by stochastic process. A simulation method and some calculated results are presented in this paper. More complex problem in the gamma-gamma ray logging may be treated with this method.