Development of (X,eX) Spectroscopy

(X,eX)光谱学的发展

• 批准号: 04403003
• 负责人: UDAGAWA Yasuo
• 金额: $ 11.14万
• 依托单位: TOHOKU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (A)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-04403003/
• 关键词: XeX; recoil electron; X-ray Raman scattering; Compton scattering; XeX; X線非弾性散乱; 運動量; X線散乱

In Compton scattering experiments, monochromatic X-ray photons are inelastically scattered, and scattered X-ray photons are detected as a function of direction and energy. In (X,eX) spectroscopy, in addition to X-ray photons, coincident recoil electrons are measure also as a function of energy and direction. Then, by the use of momentum coservation and energy conservation, the initial electronic state can completely described. Although pointed out in earlier times, (X,eX) signal has never been observed because of experimental difficulties. In order for this goal to be achieved, excitation X-rays should be strong, scattered X-rays should be efficiently collected, and recoil electron should be discriminated from electrons from different origin, ex.photoelectron. In this study, efficient X-ray spectrometera and an electron analyzer are developed in order to observe (X,eX) phenomenon.A monochromator having a spherically bent Si (440) crystal and a spectrometer having a singly bent graphite (004) crystal were constructed. By the use of these, very weak X-ray Raman scattering was observed (Reference 1). Then, a single spherical electrostatic analyzer was constructed, which consists of an inner sphere of 64 mm in diameter and an oute sphere of 86 mm in diameter. The resolution was 2 eV as expected, and (e, 2e) phenomena which is an electron analogure of (X,eX) were observed (submitted for publication). By combining these elements (X,eX) measurements were carried out and coincident signals were observed. They might, however, originate from photoelectron, and we are still trying to make it sure whether they are (X,eX) signals or not.

在康普顿散射实验中，单色x射线光子被非弹性散射，而散射的x射线光子被检测为方向和能量的函数。在（X,eX）光谱学中，除了测量X射线光子外，还测量同步反冲电子作为能量和方向的函数。然后，利用动量守恒和能量守恒，可以完整地描述电子的初始状态。（X,eX）信号虽然早前就被指出，但由于实验困难，从未被观测到。为了实现这一目标，激发x射线必须强，散射x射线必须有效收集，反冲电子必须与来自不同来源的电子（如光电子）区分开来。为了观察（X,eX）现象，研制了高效X射线能谱仪和电子分析仪。构造了具有球形弯曲Si（440）晶体的单色仪和具有单弯曲石墨（004）晶体的光谱仪。通过使用这些，观察到非常弱的x射线拉曼散射（参考文献1）。然后，构建了一个单球形静电分析仪，该分析仪由一个直径为64 mm的内球和一个直径为86 mm的外球组成。如预期的那样，分辨率为2ev，并且观察到（e, 2e）现象，这是（X,eX）的电子类比（提交发表）。结合这些元素（X,eX）进行测量并观察到一致的信号。然而，它们可能来自光电子，我们仍在努力确定它们是否是（X,eX）信号。

项目成果

Y.Udagawa,H.Hayashi,K.Tohji and T.Mizushima: "X-Ray Resonant Raman Spectra of Several Copper Compounds" J.Phys.Soc.Jpn.63. 1713-1720 (1994)

Y.Udakawa、H.Hayashi、K.Tohji 和 T.Mizushima：“几种铜化合物的 X 射线共振拉曼光谱”J.Phys.Soc.Jpn.63。

宇田川康夫: "X線吸収微細構造" 学会出版センター, 222 (1993)

宇田川康夫：《X射线吸收精细结构》学会出版中心，222（1993）

H.Hayashi,K.Tohji,Y.Udagawa,and A.Ueno.: "Small-Angle X-Ray Scattering Study on the Growth of Metal Silicate Polymers" Bull.Chem.Soc.Jpn.66. 1024-1027 (1993)

H.Hayashi、K.Tohji、Y.Udakawa 和 A.Ueno.：“金属硅酸盐聚合物生长的小角度 X 射线散射研究”Bull.Chem.Soc.Jpn.66。

水嶋生智、宇田川康夫: "「金属アルコキシドを用いる触媒調製」(上野晃史他編)" アイピーシー, 17 (1993)

Ikutomo Mizushima、Yasuo Udakawa：“‘使用金属醇盐制备催化剂’（由 Akira Ueno 等人编辑）”IPC，17 (1993)

宇田川 康夫,田路 和幸,水嶋 生智,林 久史: "種々の同化合物のX線共鳴ラマンスペクトル" 豊田研究報告. 45. 9-18 (1992)

Yasuo Udakawa、Kazuyuki Taji、Ikutomo Mizushima、Hisashi Hayashi：“各种相同化合物的 X 射线共振拉曼光谱”丰田研究报告 45. 9-18 (1992)。