Integral Multiparameter Diffractometry of Nanosystems on the Basis of Effects of Multiplicity of Diffuse Scattering

The generalized dynamical theory of Bragg and diffuse scatterings of x-rays in crystals with defects of several types is presented in a given article. Expressions for differential and integrated scattering intensities, which connect them with characteristics of defects in crystals, are considered in cases of Bragg and Laue geometries. Extinction effects due to scatterings on defects without limitation of their sizes are described in coherent and diffuse scatterings at small and large effects of diffuse extinction for differential and integrated coefficients of extinction due to multiple scattering on fluctuating deviations from the periodicity of crystal lattices. New physical conception is created and based on the built dynamical theory, at its comparison with kinematic one, that allowed to discover and analyse in detail the physical nature of discovered effects, which stipulate the principal limit of informativity of kinematic scattering, on the one hand, and the radical increasing of informativity in case of dynamical diffraction, on the other hand. As shown, this increase of informativity is caused by discovered effect of significant dependence of the character of defects’ influence to dynamical scattering on diffraction conditions that is absent in kinematic case. Unique diagnostic facilities of created integral diffuse-dynamical combined diffractometry (IDDCD) are shown. They are caused by this effect and by series of consequences from it. Particularly, qualitatively new possibilities of carrying out of multiparameter diagnostics of materials and products of nanotechnologies are shown. In addition, the models of high-informative IDDCD are created on the basis of developed theory for analysis of both the intensities’ leap near K-edge of extinction and the deviations from Friedel low as well as their deformation and thickness dependences. The experimental test of developed models is carried out.

Abstract licence: CC BY-ND

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