Photon interference x-ray absorption fine structure - art. no. 201101

We report about a fine structure in x-ray absorption spectra, named photon interference x-ray absorption fine structure (pi XAFS). pi XAFS is due to t he interference of x-rays inside the sample and extends across absorption e dges. Using a platinum foil pi XAFS was measured in a high precision absorp tion experiment. Excellent agreement with a theoretical pi XAFS simulation is achieved in the energy range for above an absorption edge where photoele ctron XAFS is negligible. pi XAFS provides a method for determination of at omic structure on short- and long-range order scale.