ON THE INFLUENCE OF CHANNELING OF HIGH-ENERGY ELECTRONS ON THE SPECTRAL PROPERTIES OF THEIR RADIATION IN A CRYSTAL

We consider some features of motion and radiation of relativistic electrons in thin crystals at small values of the particle angle of incidence on the crystal relative to a crystallographic axis when the channeling effect takes place. The main attention is paid to peculiarities of radiation spectral characteristics for the particles which move in different modes, such as: over-barrier motion, axial channeling, planar channeling. It was shown that for small values of the incidence particle angle the positions of maxima of the radiation spectra for the above-barrier and channeling modes differ. This is due to the difference in the character of motion of particles in these modes.