New mechanism of jump formation in a spectrum of coherent radiation by relativistic electrons in the field of periodically deformed crystal planes of atoms

The process of coherent radiation by relativistic electrons, which move in the field of periodically deformed crystal planes of atoms, is considered in the high-frequency range of emitted photons. The new mechanism of formation of sharp jumps in the radiation spectrum at this frequency range, based on the structure of asymptotic forms of the function that is summing in the cross section, is predicted.