Auger-photoelectron coincidence-spectroscopic studies of the relaxation processes for core-level excitied states in solids

固体中核心级激发态弛豫过程的俄歇光电子符合光谱研究

• 批准号: 06452042
• 负责人: OKUSAWA Makoto
• 金额: $ 4.93万
• 依托单位: Gunma University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06452042/
• 关键词: Auger-electron Spectroscopy; Photoelectron Spectroscopy; Coincidence Spectroscopy; Solid; Core-level; Excited State; Relaxation Process; 内殻電子

Our research project has been planed to establish an effective method of the Auger-photoelectron coincidence spectroscopy for solids. We need two electron energy analyzers to analyze the energies of both Auger electrons and core photoelectrons which are emitted from a solid sample by irradiating soft x-rays. In addition, the simultaneous detection of electrons from both analyzers must be made to show that both electrons came from the same excitation-decay event. In this experiment, it is essential that the small area (1mm^2) on the sample which every energy analyzer sees, and the area on the sample which the exciting soft x-rays hit, overlap each other.This year is final one in the schedule of our three-year-project. We considered some counterplans this year to resolve difficulties which had arisen on the performance of the experiments in last year. Main counterplans considered are as follows : more complete elimination of remanent magnetization with use of mu-metal sheets of high perm … More eability, the installation of electron lenses in front of both analyzers, the construction of the new positioning apparatus for the energy analyzing system, and the improvement of the computer software for the control of the simultaneous detection system of Auger electron and photoelectron signals. The simulteneous detection system has nearly been completed with these consideration of the counterplans. Better performances in some parts of the system were obtained than expected. The routine work of the coincidence spectroscopy has become possible, although the completion of the apparatus was delayd just a little.For Ce metal, a preliminary result has been obtained that the existence of remarkable relaxation process is suggested in an intermediate state between the final state of the Ce 3d photoemission process and the initial state of the Ce M_<4,5>N_<4,5>N_<6,7> Auger relaxation process. This process seems to be correlated with the Ce 4f level. This result is very interesting in relation to problems of the heavy electron system. With our Auger-photoelectron coincidence detection system, new interesting results including above-mentioned remarkable relaxation process will be observed. We hope that our project will contribute greatly to the elucidation of relaxation processes for exited states in solids. Less

我们的研究计划是建立一种有效的固体俄歇-光电子符合谱方法。我们需要两台电子能量分析仪来分析软X射线照射固体样品所产生的俄歇电子和芯光电子的能量。此外，必须同时检测来自两个分析器的电子，以表明两个电子来自同一个激发-衰变事件。在这个实验中，每个能量分析仪看到的样品上的小区域（1平方毫米）和激发的软X射线击中的样品上的区域相互重叠是至关重要的。今年是我们三年计划的最后一年。我们今年考虑了一些对策，以解决去年实验中出现的困难。考虑的主要对策是：采用高磁导率的高导磁合金板， ...更多信息 在两个分析器前安装电子透镜，构造新的能量分析系统定位装置，改进俄歇电子和光电子信号同时探测系统的计算机控制软件。在这些对策的考虑下，同时检测系统已接近完成。系统的某些部分的性能比预期的要好。对Ce金属的初步研究表明，在Ce 3d光电发射过程的终态和Ce M_（4，5）N_（4，5）N_（6）的初态之间的中间态存在着明显的弛豫过程。7>俄歇弛豫过程。这一过程似乎与Ce 4f能级有关。这个结果对于重电子系统的问题是非常有趣的。利用我们的俄歇-光电子符合探测系统，将观察到包括上述显著弛豫过程在内的新的有趣结果。我们希望我们的项目将大大有助于阐明在固体激发态的弛豫过程。少

项目成果

OKUSAWA,M.: "NEW STRUCTURES OBSERVED IN RESONANT PHOTOEMISSION FROM THE Ni3s LEVEL OF NiCl_2" Photon Factory Activity Report (1994). 12. 17 (1995)

OKUSAWA,M.：“从 NiCl_2 的 Ni3s 水平共振光发射中观察到的新结构”光子工厂活动报告（1994 年）。

釜田 重徳: "光電子スペクトルにおける温度依存性の解析法とその高分解能価電子帯スペクトルへの応用" 群馬大学教育学部紀要 自然科学編. 第45巻. 37〜52 (1997)

Shigenori Kamata：“光电子光谱的温度依赖性分析方法及其在高分辨率价带光谱中的应用”群马大学教育学部通报，自然科学版，第 45 卷，37-52（1997 年）。

Okusawa,M.: "Temperature dependence of the valence-band photoemission spectra in YbInCu_4" J.Electron Spectrosc.Related Phenom.78. 139〜142 (1996)

Okusawa, M.：“YbInCu_4 中价带光电子发射光谱的温度依赖性”J.Electron Spectrosc.Related Phenom.78 (1996)。

Okusawa, M., Weschke, E., Meier, R., Kaindl, G., Ishii, T., Sato, N.and Komatsubara, T.: "Temperature dependence of the valence-band photoemission spectra in YbInCu_4" J.Electron Spectrosc.Related Phenom. 78. 139-142 (1996)

Okusawa, M.、Weschke, E.、Meier, R.、Kaindl, G.、Ishii, T.、Sato, N. 和 Komatsubara, T.：“YbInCu_4 中价带光电子发射光谱的温度依赖性”J.

高野 勝昌: "固体に関する光電子スペクトルの解析法とその内殻準位線への応用" 群馬大学教育学部紀要 自然科学編. 第44巻. 91〜102 (1996)

高野胜正：“固体光电子能谱分析方法及其在核心能级线中的应用”群马大学教育学部通报，自然科学版，第 44 卷，91-102 (1996)