Bremsstrahlung effect at resonant Compton scattering of a photon by a multielectron atom

The leading role of the bremsstrahlung at resonant Compton scattering of a hard X-ray photon by a multielectron atom has been theoretically predicted. This result can be important in the interpretation of $K\alpha,\beta$ spectra of X-ray emission of stars, galaxies, and clusters of galaxies.