Polarization-Dependent Resonant Anomalous Surface X-ray Scattering of   CO/Pt(111)
  Polarization dependence of resonant anomalous surface x-ray scattering (RASXS) was studied for interfaces buried in electrolytes or in high-pressure gas. We demonstrate that RASXS exhibits strong polarization dependence when the surface is only slightly modified by adsorption of light elements such as carbon monoxide on platinum surfaces. s- and p-polarization RASXS data were simulated with the latest version of ab initio multiple scattering calculations (FEFF8.2). Elementary considerations are additionally presented for the origin of the polarization dependence in RASXS. 
Andreas Menzel, Yuriy V. Tolmachev, Kee-Chul Chang, Vladimir   Komanicky, Yong S. Chu, John J. Rehr, and Hoydoo You