Time-resolved x-ray absorption spectroscopy using wavelength dispersive XAFS technique

The time-resolved X-ray absorption spectroscopy is a powerful technique to dynamically elucidate the local structure and the electronic state of a target element during the fast reaction processes. The wavelength-dispersive XAFS (DXAFS) method attracts great attention for the mechanistic researches, because it is the only technique to apply to the single-action processes, which are difficult to repeat. Recent developments of the DXAFS instrument enable us to perform the time-resolved applications in sub-nano second time region by utilizing the pulse characteristics of synchrotron radiation. This report introduces the concept, the technical details, and the limitations for the utilization of the DXAFS technique. (author)