Visualization of valence electron density distribution by quadrupole scattering measurement

本研究的目的是通过利用同步辐射的偏振特性和改进偏振控制/测量技术来探测在选择性测量仅来自价电子的散射X射线中起关键作用的非汤姆逊散射。从衍射强度与入射X射线偏振的关系可以看出，锰氧化物中轨道有序引起的超晶格反射归因于非汤姆逊散射。此外，已经证明，消光效果可以针对每一次反射独立地进行评估。

The aim of this study is to detect non-Thomson scattering, which plays a key role in selective measurement of scattered X-rays only from valence electrons, by utilizing polarization properties of synchrotron radiation and improving polarization control/measurement techniques. From the dependence of diffraction intensity on incident X-ray polarization, it has been found that the super-lattice reflection arising from orbital ordering in manganites is attributed to non-Thomson scattering. In addition, it has been demonstrated that the effect of extinction can be independently evaluated for every reflection.