Investigation into conditions of experimental observation of Borrmann effect in a parametric X-radiation

Abstract

Spectral-angular characteristics of coherent X-ray radiation of relativistic electrons in a crystal are formulated in the framework of the dynamic theory of X-rays diffraction. Numerical calculations of the radiation angle density are carried out for silicon and germanium single crystal to define the optimal experimental conditions of the anomalously low photoabsorption (Borrmann effect) observation in the parametric X-radiation (PXR) with Bragg geometry