Orientation and dynamics of molecules on surface observed by highly sensitive Penning ionization electron spectroscopy

高灵敏潘宁电离电子能谱观察表面分子的取向和动力学

• 批准号: 14340173
• 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 (B)
• 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/en/grant/KAKENHI-PROJECT-14340173/
• 关键词: Penning ionization; electron spectroscopy; collisional ionization; intermolecular interaction; reaction dynamics; molecular orbital; 衝突エネルギー; 相互作用ポテンシャル; 電子エネルギー分析器

1.Low collision energy beam source of metastable atoms was developed by cooling discharge nozzle with liquid nitrogen. The He^*(2^3S) beam profile had been wide shape and high speed due to the high temperature by the discharge. In this study, we have performed wide collision energy range experiment from 20 meV to 400 meV.2.In super sonic jet molecular beam, molecules are known to be oriented by frequent collisions with rare gas atoms. In this study, we have observed the orientation effect in super sonic jet molecular beam by collision energy dependence of partial Penning ionization cross sections.3.In atomic collisional ionization process, one can observe satellite bands that are not observed in photo ionization electron spectroscopy. By 2D-Penning ionization electron spectroscopy, we can obtain information on assignment of satellite bands originated by electron correlation effects. We have observed shake-up bands as well as auto-ionization bands via super excited states of halogen atoms.

1.利用液氮冷却放电喷嘴，研制了亚稳态原子的低碰撞能束源。由于放电产生的高温，He^*(2^3s)的束流轮廓较宽，速度较快。在本研究中，我们进行了从20 meV到400 meV的宽碰撞能区实验。2.在超音速喷射分子束中，分子由于频繁地与稀有气体原子碰撞而定向。在本研究中，我们通过部分Penning电离截面与碰撞能量的关系，观察到了超音速喷射分子束中的取向效应。3.在原子碰撞电离过程中，人们可以观察到在光致电离电子光谱中没有观察到的卫星带。通过2D-Penning电离电子能谱，我们可以获得由电子相关效应产生的卫星谱带归属的信息。通过卤素原子的超激发态，我们观察到了振荡带和自电离带。

项目成果

T.Horio, R.Maruyama, N.Kishimoto, K.Ohno: "A Crossed Molecular Beam Study on Collisional Ionization Dynamics of Acetonitrile and Benzene Molecules with He^*(2^3S)Metastable Atoms"Chem.Phys.Lett.. 384・1-3. 73-79 (2004)

T.Horio、R.Maruyama、N.Kishimoto、K.Ohno：“乙腈和苯分子与 He^*(2^3S) 亚稳态原子碰撞电离动力学的交叉分子束研究”Chem.Phys.Lett.. 384・1-3。73-79（2004）

Collision-energy-resolved Penning ionization electron spectroscopy of bromomethanes (CH3Br, CH2Br2, and CHBr3) by collision with He*(2(3)S) metastable atoms.

通过与 He*(2(3)S) 亚稳态原子碰撞得到的溴甲烷（CH3Br、CH2Br2 和 CHBr3）的碰撞能量分辨潘宁电离电子能谱。

• DOI: 10.1063/1.1769367
• 发表时间: 2004
• 期刊: The Journal of chemical physics
• 作者: N. Kishimoto;E. Matsumura;K. Ohno;M. Deleuze
• 通讯作者: M. Deleuze

Low velocity experiments for collision energy dependence of partial ionization cross-sections of C2H2 with He*(23S) metastable atoms

C2H2 与 He*(23S) 亚稳态原子部分电离截面碰撞能量依赖性的低速实验

• DOI: 10.1016/j.cplett.2004.08.127
• 发表时间: 2004
• 期刊: Chemical Physics Letters
• 影响因子: 2.8
• 作者: T. Horio;T. Hatamoto;N. Kishimoto;K. Ohno
• 通讯作者: K. Ohno

Masakazu Yamazaki, Satoshi Maeda, Naoki Kishimoto, Koichi Ohno: "Classical Trajectory Calculations for Two-Dimensional Penning Ionization Electron Spectra of N_2, CO, and CH_3CN with Metastable He*(2^3S) Atoms"The Journal of Chemical Physics. 117. 5707-57

Masakazu Yamazaki、Satoshi Maeda、Naoki Kishimoto、Koichi Ohno：“具有亚稳态 He*(2^3S) 原子的 N_2、CO 和 CH_3CN 二维潘宁电离电子谱的经典轨迹计算”化学物理杂志。

Penning ionization electron spectroscopy of C_6H_6 by collision with He*(2^3S)metastable atoms and classical trajectory calculations : Optimization of ab initio model potentials

通过与 He*(2^3S) 亚稳态原子碰撞得到的 C_6H_6 潘宁电离电子能谱和经典轨迹计算：从头算模型势的优化

• 发表时间: 2005
• 期刊: J.Chem.Phys. 122
• 作者: Masakazu Yamazaki;Satoshi Maeda;Naoki Kishimoto;and Koichi Ohno
• 通讯作者: and Koichi Ohno