The effective application of gamma-gamma density logging in the dissection of a geologic section is largely determined by the correct choice of the distance between the source and detector of radioactive radiation (probe length), the integration constant and the speed of the logging tool.

The distribution of gamma quanta along the directions of motion is one of the main characteristics of gamma fields. Data on the angular distribution of gamma rays are used in the design of probe devices, selection of optimal geometric conditions and methodological techniques of measurements in nuclear geophysical methods of studying rocks.