Site-Selective X-Ray Absorption Fine Structure (XAFS) Spectroscopy. (1) Design of Fluorescence Spectrometer and Emission Spectra
Site-Selective X-Ray Absorption Fine Structure (XAFS) Spectroscopy. (1) Design of Fluorescence Spectrometer and Emission Spectra
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位点选择性 X 射线吸收精细结构 (XAFS) 光谱。
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
H. Nagamori
中科院分区：
文献类型：
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作者：
Y. Izumi;H. Oyanagi;H. Nagamori
罗兰型荧光光谱仪被设计为利用每个位点发射峰的化学位移来测量位点选择性 XAFS 光谱。 Johansson型圆柱弯曲Ge(111)晶体和闪烁计数器的位置由五通道步进电机独立控制，从而满足精确的罗兰条件。因此，在布拉格角 55.6-83.9° 和罗兰半径 127.7-240.9 mm 的宽范围内测量许多荧光线是可行的。从 Cu 到 CuCl 时，Cu Kα 峰移动 +1.6 eV，从 CuCl 到 CuCl2 时，Cu Kα 峰移动 -0.6 eV。 Cr Kβ1 峰从 Cr 到 Cr2O3 移动了 +0.8 eV，从 Cr2O3 到 K2CrO4 移动了 -1.6 eV。 Cu Kα 峰的 FWHM 小至 3.0 eV。研究发现控制该光谱仪能量分辨率的主要因素是几何角宽度（狭缝尺寸）。在本文的狭缝尺寸范围内，罗兰半径和X射线对弯曲晶体的穿透深度的影响较小[狭缝...
A Rowland-type fluorescence spectrometer was designed to measure site-selective XAFS spectra by utilizing the chemical shift of emission peak for each site. The positions of Johansson-type cylindrically-bent Ge(111) crystal and scintillation counter were controlled independently by five-channel stepping motors, thereby satisfying precise Rowland condition. Thus, measurements of many fluorescence lines over wide ranges of Bragg angle 55.6—83.9° and Rowland radius 127.7—240.9 mm are made feasible. The Cu Kα peak shifted by +1.6 eV on going from Cu to CuCl and by -0.6 eV on going from CuCl to CuCl2. The Cr Kβ1 peak shifted by +0.8 eV on going from Cr to Cr2O3 and by -1.6 eV on going from Cr2O3 to K2CrO4. The FWHM of Cu Kα peaks was as small as 3.0 eV. The major factor to control the energy resolution of this spectrometer was found to be geometrical angle width (slit size). The effects of Rowland radius and X-ray penetration depth into the bent crystal were smaller in the range of slit size in this paper [sli...
DOI：
10.1530/jrf.0.0910001
发表时间：
1991
期刊：
Journal of reproduction and fertility
影响因子：
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作者：
D. Stirling;Michael R. Waterman;Evan R. Simpson
通讯作者：
D. Stirling;Michael R. Waterman;Evan R. Simpson