Gamma tomography of density distribution in concentrated disperse systems

A procedure based on the gamma technique is proposed to determine the spati al density distribution in concentrated disperse systems. In this procedure , the attenuation of a wide, plane beam of gamma radiation by the layers of the system being investigated is preliminarily measured in three mutually perpendicular directions. A sample is simulated by some set of elementary c ubes of definite density. Methods of nonlinear programming are applied to s elect the density of the substance in the elementary volumes of the model s o as to minimize the root-mean-square deviation of the model dependences of the attenuation of the flux from the experimental ones; the pattern of the density distribution in the system and the elementary volume density distr ibution are obtained.