The soft-photon bremsstrahlung in an electron and a positron collision with a hydrogen atom

The process of bremsstrahlung, formed in the fast e +or- +H collisions with a simultaneous excitation or ionization of the target, is considered in the low-frequency limit. It is demonstrated that in the case of the positron scattering the intensity of the 'inelastic' bremsstrahlung greatly exceeds the intensity of the radiation formed during the collision without the change of the target's state. The role of 'inelastic' channels in the formation of the total bremsstrahlung spectrum of the electron is relatively small.