Development of Time and Space Resolved 2-Dimensional Penning Ionization Electron Spectroscopy

时空分辨二维潘宁电离电子能谱的发展

• 批准号: 07554024
• 负责人: OHNO Koichi
• 金额: $ 10.75万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07554024/
• 关键词: electron spectroscopy; Penning ionization; cluster; imaging detection; excited atoms; photoelectron spectroscopy

In this research project, we have developed a new apparatus for the study of photo-and Penning ionization spectroscopy by utilizing time-resolved imaging technique. Along with the development of a new experimental system, we also applied collision-energy-resolved Penning ionization spectroscopy to various molecules including organic molecules, transition metal-molecule complexes, and nonvolatile molecules.As for the development of a new experimental apparatus, we construced an apparatus for the photo-and Penning ionization spectroscopy of various clusters and their ions. The apparatus consists of five-differentially evacuated chambers : (1) laser vaporization cluster ion source, (2) time-of-flight mass spectrometer for the mass-separation of the cluster ions, (3) magnetic-bottle-type electron energy analyzer, (4) nozzle discharge source for the production of rare-gas metastable atom beam, and (5) part for the production of pure and pulsed metastable beam. We have started experiment of the laser photoelectron spectroscopy of size-selected cluster negative ions. First we the checked performance of the time-of-flight mass spectrometer and the magnetic-bottle photoelectron energy analyzer for the silicon cluster negative ions, Si_n. Next the system of copper clusters reacted with NO molecules are investigated by this technique. Especially, the Cu_2N^- ions are found to have at least two different isomers : one has a structure of Cu_2^- with which an N atom is weakly bound, and another has a tightly bound structure. The imaging detection was also carried out in the magnetic-bottle electron spectrometer. The photoelectron image are found to be the one magnified almost 7 times from the original, which was a result almost as predicted. Finally, we are now optimizing the performance of the new metastable atomic beam. After this optimization, we can start the experiment of Penning ionization photoelectron spectroscopy of clusters.

在这个研究项目中，我们开发了一种利用时间分辨成像技术研究照片和潘宁电离光谱的新装置。随着新实验系统的开发，我们还将碰撞能量分辨潘宁电离谱应用于各种分子，包括有机分子、过渡金属分子配合物和非挥发性分子。对于新实验装置的开发，我们构建了用于各种簇及其离子的光和潘宁电离光谱的装置。该装置由五个差速真空室组成：（1）激光汽化簇离子源，（2）用于簇离子质量分离的飞行时间质谱仪，（3）磁瓶型电子能量分析仪，（4）用于产生稀有气体亚稳原子束的喷嘴放电源，以及（5）用于产生纯亚稳束和脉冲亚稳束的部件。我们已经开始了尺寸选定的团簇负离子的激光光电子能谱实验。首先我们检验了飞行时间质谱仪和磁瓶光电子能量分析仪对硅团簇负离子Si_n的性能。接下来通过该技术研究了与NO分子反应的铜簇系统。特别是，发现Cu_2N^-离子具有至少两种不同的异构体：一种具有与N原子弱结合的Cu_2^-结构，另一种具有紧密结合的结构。成像检测也在磁瓶电子能谱仪上进行。发现光电子图像比原始图像放大了近7倍，这与预测的结果几乎一致。最后，我们现在正在优化新型亚稳态原子束的性能。经过这样的优化，我们就可以开始团簇的潘宁电离光电子能谱实验了。

项目成果

H.Yamakado: "Penning Ionization of Cyclopropanes by Collision with He^*(2^3S)Metastable Atoms." J.Phys.Chem. 101. 3887-3894 (1997)

H.Yamakado：“通过与 He^*(2^3S) 亚稳态原子碰撞实现环丙烷的彭宁电离。”

M.Yamauchi: "Penning Ioniration of Cyelic Ethers by Collision with He^*(2^3S)Metastable Atoms" Journal of Physical Chemistry. 101(35). 6184-6194 (1997)

M.Yamauchi：“通过与 He^*(2^3S)亚稳态原子碰撞进行环醚的潘宁电离”物理化学杂志。

N. Kishimoto: "Penning Ionization of Thiophone, Furan, and Pyrrole by Collision with He^4 (2^3S) Metastable Atoms" Journal of Physical Chemistry. 100(20). 8204-8211 (1996)

N. Kishimoto：“通过与 He^4 (2^3S) 亚稳态原子碰撞实现硫酮、呋喃和吡咯的彭宁电离”物理化学杂志。

K.Ohno: "Penning Ionization of HCHO,C_2H_4 and CH_2CHCHO by Collision with He^*(2^3S)Metastable Atoms." J.Phys.Chem. 99. 14247-14253 (1995)

K.Ohno：“通过与 He^*(2^3S) 亚稳态原子碰撞实现 HCHO、C_2H_4 和 CH_2CHCHO 的潘宁电离。”

N.Kishimoto: "Penning Ionization of CH_3SCH_3,CH_3SSCH_3,and CH_2CH_2SH by Collision with He^*(2^3)Metastable Atoms." J.Phys,Chem.101. 3284-3292 (1997)

N.Kishimoto：“通过与 He^*(2^3) 亚稳态原子碰撞，CH_3SCH_3、CH_3SSCH_3 和 CH_2CH_2SH 发生彭宁电离。”