Tomsk: . TSU, 1966, - 179 s. When charged particles and gamma quanta pass through a substance, a large number of defects are generated in the latter. the rate and density of formation of which depends on the particle flux intensity , their energy , depth of penetration into the sample, energy and spatial distribution in it , as well as the properties of the irradiated medium. In this regard, the study of runs, energy losses, scattering, etc. is of interest for radiation chemistry, radiation physics and radiation biology. d. radiation in the substance . Since radiation of any kind in materials forms secondary electrons involved in the production of defects, it is natural to start considering the problem with the analysis of the interaction of electrons with bodies. The first stage of interaction dissipation of energy electrons in a substance, but not the consequences of radiation, is devoted to this work.