The specific features of the formation of a diffraction image of a single edge dislocation in the case where the defect region could be located at different points of the scattering triangle were investigated by computer simulation and experimentally. The dislocation images were experimentally obtained at different wavelengths and for different reflections. The diffraction geometry in which the dislocation line was perpendicular to the sample surface and the Burgers vector was parallel or perpendicular to the reciprocal lattice vector was studied. From analysis of the experimental and theoretical images, inferences were made regarding the image symmetry, as well as the angular resolution and the sensitivity of section topography to the formation of the dislocation image. Special attention was focused on the dependence of the image contrast and the image size on the radiation wave-length, the magnitude of the reciprocal lattice vector, and the interference absorption.

Formation of the Image of an Edge Dislocation in an Absorbing Crystal. I.A.Smirnova, E.V.Suvorov, E.V.Shulakov: Physics of the Solid State, 2007, 49[6], 1104-10