A development of site-selective, valence-selective, and spin-selective XAFS spectroscopy by inelastic x-ray scattering

由于目前的资助，我们已经建立了一个高灵敏度的X射线光谱仪，开发了一种方法来获得寿命展宽自由XANES光谱，并进行了以下光谱研究。构造了一台配备二维探测器和五个色散分析晶体的X射线光谱仪.我们已经成功地获得弱XANES光谱激发下pre-resonantt条件下，由于上述高灵敏度光谱仪。随后，我们证明了无寿命展宽的XANES谱可以通过基于Kramers-Heisenberg方程的方程数值分析得到.在1和2的基础上，我们进行了以下研究。(1)MnO和其他锰化合物的自旋选择XANES谱的观察。(2)通过自旋选择性极化XANES光谱研究LaMnO 3的轨道和自旋有序。(3)Dy和Ho化合物2 p-4f四极跃迁的观测(4)混合价（Ge^<3+>（Ge^+Cl^-4））化合物GeCl_2的选价XANES研究

Thanks to the present grant, we have constructed a high-sensitive x-ray spectrometer, developed a method to obtain lifetime-broadening-free XANES spectra, and carried out the following spectroscopic studies.1. Construction of an x-ray spectrometer equipped with a two-dimensional detector and five dispersing analyzer crystal.2. We have succeeded in obtaining weak XANES spectra excited under pre-resonantt conditions owing to the high-sensitive spectrometer described above. Subsequently, we have shown that lifetime-broadening-free XANES spectra can be obtained by numerically analyzing those spectra by an equation based on Kramers-Heisenberg equation.3. Based on 1 and 2, we have carried out the following studies.(1) Observation of spin-selective XANES spectra of MnO and other manganese compounds.(2) Studies on orbital- and spin-ordering of LaMnO3 by spin-selective, polarization XANES spectra.(3) Observation of 2p-4f quadrupole transitions of Dy and Ho compounds.(4) Valence-selective XANES study of mixed valence (Ge^<3+>(Ge^+Cl^-_4)) compound GeCl_2.