X-ray scattering from freely suspended smectic films: resolution and othereffects

Off-specular X-ray diffuse scattering from a free suspended smectic film ha s been performed using different scanning geometries. Rocking scans and dif fuse scans out of the plane of incidence are analyzed using a general Forma lism to describe the resolution function. The diffuse intensity is calculat ed via the use of Gaussian distributions for the resolution function within the framework of the first Born approximation. For each of the scanning ge ometrics, practical analytical expressions are given which account well for the experimental data. (C) 2000 Elsevier Science B.V. All rights reserved.