Development of time-resolved photoelectron imaging for studies on hydrated electron

用于研究水合电子的时间分辨光电子成像的发展

• 批准号: 14204063
• 负责人: SUZUKI Toshinori
• 金额: $ 36.44万
• 依托单位: RIKEN (2003-2004)Okazaki National Research Institutes (2002)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14204063/
• 关键词: photoelectron spectroscopy; femtosecond; ultrafast spectroscopy; imaging; droplet; solvated electron; hydrated electron; time-resolved charged particle imaging; フェムト秒; 光電子

The aim of this work was to develop an atomization technique of bulk liquids to form a nano-scale droplets, allowing detailed laser photoelectron spectroscopy on hydrated electron in the droplet. An atomization process using Rayleigh instability I continuous liquid flow was examined and a new way of efficient disintegration of liquid was investigated through development of new nozzles. Two major types of a crossed liquid-gas jets and coaxial expansion of liquid and gas were tested, in which good performance was confirmed for the coaxial type. Laser-assisted particle image velocimetry was employed to measure the velocities of droplets, and Mie light scattering to measure the size distribution in micrometer scale. In addition, the size distribution in nano-scale was examined using a differential mobility analyzer(DMA). The DMA indicated that nano-scale droplets are efficiently formed by using our nozzles. Furthermore, time-of-flight mass analysis characterized the droplet size distribution produced by atomization in high vacuum, and nano-scale droplets were observed to confirm the results of DMA.

这项工作的目的是开发一种散装液体雾化技术，形成纳米级液滴，从而对液滴中的水合电子进行详细的激光光电子能谱分析。研究了利用瑞利不稳定性 I 连续液体流的雾化过程，并通过开发新喷嘴研究了液体有效分解的新方法。对液气交叉射流和液气同轴膨胀两种主要类型进行了测试，证实了同轴型具有良好的性能。采用激光辅助颗粒图像测速仪测量液滴的速度，并采用米氏光散射测量微米级的尺寸分布。此外，使用微分迁移率分析仪（DMA）检查了纳米级的尺寸分布。 DMA 表明，使用我们的喷嘴可以有效地形成纳米级液滴。此外，飞行时间质量分析表征了高真空中雾化产生的液滴尺寸分布，并观察了纳米级液滴以证实 DMA 的结果。

项目成果

Femtosecond photoelectron imaging on pyridine : electronic dephasing from the S1(n,π^*) state and Rydberg state energetics

吡啶上的飞秒光电子成像：S1(n,π^*) 态的电子相移和里德堡态能量学

• 发表时间: 2004
• 期刊: Journal of Physical Chemistry A 107
• 作者: M.Tsubouchi;T.Suzuki
• 通讯作者: T.Suzuki

鈴木俊法: "化学反応の実時間追跡"日本物理学会誌. 58. 765-769 (2003)

Toshiharu Suzuki：“化学反应的实时跟踪”日本物理学会杂志 58. 765-769 (2003)。

Photodissociation of Nitorous Oxide revisited by high-resolution photofragment imaging : energy partitioning

通过高分辨率照片碎片成像重新审视一氧化二氮的光解：能量分配

• 发表时间: 2004
• 期刊: Journal of Physical Chemistry A 108
• 作者: T.Nishide