Features of Formation of Flexural Interferential Strips on X-Ray Section Topograms in Bragg Geometry
In the presented work the features of formation of interferential deformation strips on uniformly curved crystals have been investigated by the methods of section topography and numerical modeling in Bragg geometry. The role of interbranch scattering in the formation of deformation strips (flexural contours) in a curved lattice has been investigated. It has been established that the wave field formed by Borrmann-Lehman effect has very high sensitivity to local deformations associated with defects of a crystal lattice. The possibility of use of “flexural interferential contours” for measurements of very weak surface deformations caused by quasidot defects is shown. It has been determined that differences in intensity of strips for the positive and negative sign of a gradient of a bend are associated with distinction in focusing of normal and abnormal waves.