Bragg-Laue diffraction in inclined geometry

On the basis of the dynamical theory a new geometry of X-ray diffraction is suggested and analyzed in detail. Diffraction scattering occurs from the planes deviated by several degrees from the surface normal, the incident and diffracted beams forming small glancing angles with the surface. It is shown that the asymmetry factor can be varied within a wide range through small variations of the incidence angle, which makes it possible to study diffraction both in the Laue and Bragg case. A strong dependence is observed of the departure angle of the diffracted wave on the fulfilment of the exact Bragg condition, the angular scale increasing by several orders of magnitude. The possibilities of the above-described geometry for studying thin surface layers are discussed.