Hiroyuki Oyanagi
Pixel Array Detector (PAD): State-of-the-art Segmented Detector for X-ray Spectroscopy Pt.2 — Applications
 “More is different.” P.W. Anderson described the complex property of a multi-electron system that can not be described by the one-electron picture. At that time our knowledge on strong correlations was not organized but this short statement exactly tells us that the origin of essential problems in modern condensed matter physics is complex electronic interactions. Interestingly, the same is true in the case of fluorescence x-ray detector: segmented detection (more) is different. Here we demonstrate that large-scale segmented x-ray detectors such as 100 PAD give qualitatively “different” information on local structure. ...
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Keisuke Hatada
Scattering theory in X-ray absorption studies
 After the great breakthrough in the interpretation of Extended X-ray Absorption Fine Structure (EXAFS) based on single scattering theory by Sayers, Lytle and Stern1, people started to analyze X-ray Near Edge Structure (XANES) in the same manner. In the low energy regime it was necessary to include higher order scattering terms, since the interaction between photoelectron and atoms is usually stronger. As a natural continuation of single scattering (SS) theory of EXAFS to XANES, Multiple Scattering (MS) theory started to be investigated. ...
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