Study of the effect of geometrical conditions of measurements on the intensity of secondary gamma radiations

The effect of collimation of primary gamma radiation, probe's length and angle of incidence of primary radiation on the intensity of secondary gamma radiation is studied. Logging probes for dry boreholes which are non deeper than 100 m and devices for sampling walls of mine roadways with the length of plateau up to 80 mm have been developed on the basis of the established regularities