中国科学技术大学学报 ›› 2011, Vol. 41 ›› Issue (5): 399-407.DOI: 10.3969/j.issn.0253-2778.2011.05.004

• 原创论文 • 上一篇    下一篇

阈值光电子-光离子符合速度成像技术的初步应用

唐小锋   

  1. 1.合肥微尺度物质科学国家实验室(筹),中国科学技术大学化学物理系,安徽合肥 230026; 2.中国科学技术大学国家同步辐射实验室,安徽合肥 230027
  • 收稿日期:2010-12-09 修回日期:2011-04-22 出版日期:2011-05-31 发布日期:2011-05-31
  • 通讯作者: 周晓国
  • 作者简介:唐小锋,男,1979年生,博士生. 研究方向:化学反应动力学. E-mail: tangxf@mail.ustc.edu.cn
  • 基金资助:
    国家自然科学基金(10979042, 21027005), 国家重点基础研究发展(973)计划(2007CB815204)资助.

Initial applications of threshold photoelectron-photoion coincidence velocity imaging technique

TANG Xiaofeng   

  1. 1.Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China; 2.National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China
  • Received:2010-12-09 Revised:2011-04-22 Online:2011-05-31 Published:2011-05-31

摘要: 基于同步辐射的阈值光电子-光离子符合速度成像技术采用双速度聚焦电场同时控制电子和离子的飞行轨迹,提高了收集效率和能量分辨率. 应用该技术开展了一些原子和分子的实验研究,分别测量了相应的阈值光电子谱、阈值光电子-光离子符合质谱、阈值光电子-光离子符合光谱和阈值光电子-光离子符合速度成像,展现了该技术在离子结构分析、混合物成分辨别和具有态选择的离子解离动力学等方面的初步应用.

关键词: 光电子-光离子符合, 速度成像, 阈值光电子, 同步辐射

Abstract: Threshold photoelectron-photoion coincidence (TPEPICO) velocity imaging based on synchrotron radiation ionization utilizes a double velocity map imaging to simulateneously control the trajectories of electron and ion, thus improving their collection efficiencies and energy resolutions. Using this technique, some experimental investigations of atoms and molecules were performed, and the corresponding threshold photoelectron spectroscopy (TPES), TPEPICO time-of-flight mass spectroscopy, TPEPICO spectroscopy, and TPEPICO velocity imaging were measured. Therefore, this novel technique can be applied to studies of ionic structure, identification of components in mixture and dissociation dynamics of state-selected ions.

Key words: photoelectron-photoion coincidence, velocity imaging, threshold photoelectron, synchrotron radiation