Abstract
By speeding up a conventional X-ray monochromator by a factor of 100 using the quick scanning EXAFS (QEXAFS) mode the data collection time required for a typical EXAFS scan was reduced to a couple of seconds, making XANES scans in a split second possible. Typical absorption spectra of Fe and Cu foils taken in 3.5–10 s covering an energy region of up to 800 ev are shown. It is demonstrated that the normalized Cu-EXAFS and its Fourier transform agree very well with the results of a conventional step by step measurement. The new approach allows the use of fluorescence detection and hereby makes possible the time dependent investigation of the changes in structure or valence state of a wide variety of samples which are inaccessible for transmission spectroscopy.
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