Experimental Study of Multiple Scattering in X-Ray-Absorption Near-Edge Structure

Abstract

An experimental study of the magnitude of multiple scattering of the photoelectron in the x-ray-absorption near-edge structure is presented. Two types of multiple-scattering events are distinguished: type 1, in which the scattering atoms are approximately collinear with the center atom; and type 2, in which the various scattering atoms are far from collinear. Type 1, which is known to be important in the extended x-ray-absorption fine-structure range, has a similar importance in the x-ray-absorption near-edge structure range, while type 2 is important above the edge only when the bond distances are less than ∼ 1.6 Å.