Photon interference effect in x-ray absorption spectra over a wide energy range

We consider fundamental structures in x-ray absorption spectra over a wide energy range. We formulate the elastic scattering in addition to the photoelectric absorption in recently reported photon interference x-ray absorption fine structure $\left(\pi \mathrm{XAFS}\right).\mathrm{}$ The simulations show excellent agreement with experimental x-ray absorption spectra for platinum and tungsten powders far above and below the L absorption edges. $\pi \mathrm{XAFS}$ can be as big as in the order of 10% of XAFS, and cannot be easily neglected in detailed analysis of XAFS and related phenomena.