Engineering Physics Annotation << Back GAMMA-QUANTIES AND THE REACTION OF ELECTRONPOSITRONIC PAIR FORMATION S.I. IGOLKIN The article concludes the cycle of examining the properties of photons in the frequency ranges from the boundary of radio waves to the point of transformation into an electronpositron pair. In terms of fluid mechanics, the parameters of particle structures, the limits of existence, and the conditions for the transition of a photon from one phase modification to another up to the short-wave part of the EM wave scale are established, where at a sufficient energy a change in the character of the motion occurs and the transformation of the photon into condensed matter. The general properties of the gamma-photon and electron are considered, as well as the features of the transformation reaction. The reality of various variants of the transition of mechanical, high-intensity perturbations of the photon vacuum medium into a conditionally stationary structure of two differently directed vortices of an electron and a positron is shown. Key words: photon structure, gamma-quanta, dimensions, frequency, electron-positron pair, formation scheme, energy, torques. DOI: 10.25791/infizik.04.2019.608 Contacts: E-mail: igolkins@gmail.com Pp. 13-21.