On rainbow scattering and relativistic electron radiation in crystals at motion along axis

Results of investigations into scattering and radiation of relativistic electrons in the crystal in the case when the continual potential of a separate atomic chain is the Lindhard potential, are presented. To describe the motion of relativistic particles in the crystal at a small angle to one of crystalline axes, the approximation of the continual chain-crystal potential averaged over this axis, is used. It is shown that in this case of electron scattering the effect of rainbow particle scattering takes place in the crystal and that radiation spectrum of superbar electrons contains a sharp peak in the range of low frequencies