On photon radiation by the electron in a radiation-dominance universe

Paper studies photon radiation by an electron in a radiation-dominant universe with regard to origination of arbitrary number of pairs from vacuum. In plane space this process is forbidden by laws of conservation. Dependence of process probability and of average number of originated particles on energy of initial electron is studied. Approximated expressions for probability of photon radiation by an electron, as well as, for total probability of process taking account of origination of photons and pairs from vacuum are determined in the limiting cases of high and low energies of initial electron. 5 refs