Microabsorption of scattered X-rays and its dependence on incidence angle in the nonsymmetric reflection case

The microabsorption of X-rays scattered by isotropic powder samples is studied for nonsymmetric beam geometry including grazing incidence. Experimental results for the absorption effect and its dependence on both the incidence and scattering angles are presented. The absorption behaviour is qualitatively explained by means of a simple surface-roughness model.