Researches of surface reaction processes using time-resolved electron energy loss spectroscopy

利用时间分辨电子能量损失谱研究表面反应过程

• 批准号: 11640326
• 负责人: SAKURAI Makoto
• 金额: $ 2.24万
• 依托单位: KOBE UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11640326/
• 关键词: Electron energy loss spectroscopy; Time-resolved measurement; Surface vibration; Surface and interface; Surface reaction; Carbon dioxide; Methane; 表面科学; 表面振動分光

Instrumental apparatus for time-resolved electron energy loss spectroscopy was newly developed. The developed analyzer has a position sensitive electron detector, and the signal is stored in a histogram memory in such way that channels of a partition of the memory are correspond to the energy loss spectrum, while the number of the partition corresponds to the time after the reaction started. This time dependent data acquisition system makes it possible to measure time-resolved electron energy loss spectra with the time resolution of the order of 1 s, which is about 100 times shorter than conventional spectrometers.We also developed a combinational analysis system using both infrared reflection absorption spectroscopy and electron energy loss spectroscopy, since they are complementary technique in surface vibrational spectroscopy. The vibrational modes of CO_2 and CH_4 physisorbed on a surface of Ag(111) were observed using the developed system.

研制了时间分辨电子能量损失谱仪。所开发的分析仪具有位置敏感电子检测器，并且信号以这样的方式存储在直方图存储器中，即存储器的分区的通道对应于能量损失谱，而分区的编号对应于反应开始后的时间。这种时间相关的数据采集系统使测量时间分辨的电子能量损失谱成为可能，时间分辨率为1s量级，比传统的谱仪缩短了约100倍，我们还开发了一种结合红外反射吸收谱和电子能量损失谱的分析系统，因为它们是表面振动光谱的互补技术。利用该系统观测了CO_2和CH_4在Ag（111）表面的物理吸附振动模式。

项目成果

H.Shimizu: "Characteristics of the beam line at an electron beam ion trap"Rev.Sci.Instrum.. 71. 681-683 (2000)

H.Shimizu：“电子束离子陷阱的束线特征”Rev.Sci.Instrum.. 71. 681-683 (2000)

H.Kimura: "Infrared beamline BL43IR at SPring-8 : design and commissioning"Nucl. Instrum. Meth.. (to be published). (2001)

H.Kimura：“SPring-8 的红外光束线 BL43IR：设计和调试”Nucl。

I.Arakawa: "Absolute measurement of total photo desorption yield of solid Ne in vacuum ultraviolet range"Surface Sci.. 451. 136-142 (2000)

I.Arakawa：《真空​​紫外范围内固体氖总光解吸产率的绝对测量》Surface Sci.. 451. 136-142 (2000)

T.Hirayama: "Desorption of an excimer from the surface of solid Ne by low energy electron and photon impact"Phys.Rev.B. (発表予定). (2001)

T. Hirayama：“通过低能电子和光子撞击从固体氖表面解吸准分子”Phys.Rev.B（待提交）。

H.A.Sakaue: "Total electron capture cross sections in highly charged ion-alkali metal atom collisions"Proc.21th Int.Conf.on Phys.of Electronic and Atomic Collisions. 552 (1999)

H.A.Sakaue：“高电荷离子-碱金属原子碰撞中的总电子捕获截面”Proc.21th Int.Conf.on Phys.of Electronic and Atomic Collisions。