Influence of a Coulomb-like interaction on radiation in nonrelativistic pair production

In nonrelativistic pair production the matrix element of the radiation is represented as a product of the matrix element of pair production and the nonrelativistic radiation amplitude with taking a Coulomb type interaction into account. The interaction is shown to exert considerable effect on the integral and spectral characteristics of the radiation. The cases of photon and gluon emission in lepton and quark pair production are considered in detail. 14 refs.; 7 figs