Diffraction Anomalous Fine Structure spectroscopy at the beamline BM2 at the European Synchrotron Radiation Facility

摘要

Diffraction Anomalous Fine Structure (DAFS) spectroscopy uses resonantelastic x-rays scattering as an atomic, shell and site selective probe thatgives information on the electronic structure and the local atomic environmentas well as on the long range ordered crystallographic structure. A DAFSexperiment consists of measuring the Bragg peak intensities as a function ofthe energy of the incoming x-ray beam. The French CRG (Collaborative ResearchGroup) beamline BM2-D2AM (Diffraction Diffusion Anomale Multi-longueurs d'onde)at the ESRF (European Synchrotron Radiation Facility) has developed a state ofthe art energy scan diffraction set-up. In this article, we present therequirements for obtaining reliable DAFS data and report recent technicalachievements.