Stimulated bremsstrahlung in inelastic electron-atom collisions

Stimulated multiquantum emission and ahsorption on inelastic scatteAing of fast electrons by light atoms i.n an external laser field are investigated. The partial cross sections for the 1S-2S and 1S→n transitions in hydrogen-like atoms are found. The contr+bution of stimulated channels to the total excitation cross section is analyzed for the particular case of the 1S→n=2 transition at various laser radiation intensities. Analytic results are obtained in the low frequency approximation for the total photoabsorption cross section. They are of a universal nature and are valid for arbitrary one-electron models of the target atom. At nonrelativistic incident electron energies, conditions of stimulated emission of laser field quanta are possible. At energies exceeding a few MeV the process cannot occur in the inelastic channels for any value of the collision parameters