M. Rauscher et al., SMALL-ANGLE X-RAY-SCATTERING UNDER GRAZING-INCIDENCE - THE CROSS-SECTION IN THE DISTORTED-WAVE BORN APPROXIMATION, Physical review. B, Condensed matter, 52(23), 1995, pp. 16855-16863
The specular and nonspecular intensity of x rays scattered from a roug
h surface with fluctuations in the electron density is calculated in t
he distorted-wave Born approximation. The contributions to the nonspec
ular intensity of roughness and density fluctuations can be separated.
The structure factor is given by a convolution integral of the Fourie
r transform of the density correlation function. Special geometries of
density fluctuations are discussed.