On the ratio of the relativistic electron PXR in the Bragg direction and in the forward direction in Laue geometry

Abstract

Parametric X-ray radiation and parametric X-ray radiation at a small angle with respect to the velocity of a relativistic electron crossing a single crystal plate in Laue scattering geometry are studied based on the dynamic X-ray diffraction theory. Analytical expressions for the spectral-angular density of radiations are derived in the general case of asymmetric reflection. The ratio of the contributions of these radiation mechanisms is considered.