Spectral-angular characteristics of surface parametric X-ray radiation of a relativistic electron

The spectral-angular characteristics of the surface parametric X-ray radiation (SPXR) of an electron, moving at a small angle to the crystal surface, are found. The distribution of quanta, considering the formation of the radiation both in vacuum and in a medium are obtained, The characteristics of SPXR for a number of crystal reflections with the diamond-type structure (Ge, Si and C) arc calculated.