Calculation of Grazing Incidence EXAFS Fresnel Theory Versus DWBA

  • Keil P
  • LtzenkirchenHecht D
  • Frahm R
  • 4


    Mendeley users who have this article in their library.
  • 5


    Citations of this article.


The Fresnel theory with its numerous extensions is a well established method for the calculation of grazing incidence x-ray reflectivities for single surfaces and (multi-)layered systems. However, lateral surface correlations--which are always present e.g. for polycrystalline thin films--cannot be included in these calculations. Furthermore the application of the Fresnel theory is restricted to investigations of specular reflectivities, i.e. off specular reflectivities cannot be calculated. These limitations can be overcome by the application of the distortedwave Born approximation (DWBA). Simulations of grazing incidence reflection mode EXAFS spectra will be presented and the results obtained using different calculation procedures such as the Fresnel theory, the Nevot-Croce model and the DWBA are compared. Furthermore, we will also prove the existence of a fine structure similar to EXAFS which can be observed in the region of diffusely scattered intensities. We will show that this new EXAFS technique is surface sensitive even for grazing angles above the critical angle of total reflection.

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document


  • P Keil

  • D. LtzenkirchenHecht

  • R Frahm

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free