X-ray standing waves on the surface of the crystal with the uniform strain gradient

I.A. Vartanyantz; M.V. Kovalchuk; I.N. Ustimenko

doi:doi:10.1051/jp4:1994933

Numéro		J. Phys. IV France Volume 04, Numéro C9, Novembre 1994 Proceedings of the European Symposium on Frontiers in Science and Technology with Synchrotron Radiation


Page(s)		C9-191 - C9-194
DOI		https://doi.org/10.1051/jp4:1994933

Proceedings of the European Symposium on Frontiers in Science and Technology with Synchrotron Radiation

J. Phys. IV France 04 (1994) C9-191-C9-194
DOI: 10.1051/jp4:1994933

X-ray standing waves on the surface of the crystal with the uniform strain gradient

I.A. Vartanyantz, M.V. Kovalchuk and I.N. Ustimenko

Institute of Crystallography RAS, Leninsky pr. 59, 117333 Moscow, Russia

Abstract
The results of theoretical investigation of X-ray Standing Waves (XSW) on the surface of the crystal with the Uniform Strain Gradient (USG) are presented. Bent crystals are the typical examples of the crystals with the USG. The proposed theory is based on the Takagi-Taupin theory of X-ray propagation in a weakly deformed crystal. This theory is applied for calculation of the angular dependencies of reflection coefficient and XSW on the surface of the crystal with USG for the specific case of Si(400) thick crystal, CuKa radiation. The behaviour of the XSW with the different position of adsorbed atoms (different values of the phase shift) are analyzed.