“…The effect of the asymmetry of the reflection on the angular density of the PXR in the conditions of multiple scattering of a beam of relativistic electrons on atoms of the medium was considered in the Bragg scattering geometry in [15]. In [16,17], the expressions describing the angular density of a PXR generated by a beam of relativistic electrons that cross a single crystal or a periodic layered medium were obtained in the Laue scattering geometry, taking into account multiple scattering of beam electrons by target atoms and the asymmetry of the radiation process.…”