物理化学学报 >> 1996, Vol. 12 >> Issue (02): 136-140.doi: 10.3866/PKU.WHXB19960209

研究论文 上一篇    下一篇

二氯甲烷同步辐射光电离的动力学研究

李全新,冉琴,盛六四,陈从香,高辉,俞书勤,张允武,马兴孝   

  1. 中国科学技术大学化学物理系，中国科学技术大学国家同步辐射实验室，合肥 230026
  • 收稿日期:1995-05-15 修回日期:1995-08-28 发布日期:1996-02-15
  • 通讯作者: 马兴孝

Kinetic Studies of CH2Cl2 Photoionization Using Synchrotron Radiation

Li Quan-Xin,Ran Qin,Sheng Liu-Si,Chen Cong-Xiang,Gao Hui,Yu Shu-Qin,Zhang Yun-Wu,Ma Xing-Xiao   

  1. Department of Chemical Physics,University of Science and Technology of China,National Synchrotron Radiation Laboratory,University of Science and Technology of China,Hefei 230026
  • Received:1995-05-15 Revised:1995-08-28 Published:1996-02-15
  • Contact: Ma Xing-Xiao

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摘要：

采用VUV同步辐射光源，在超声射流冷却条件下研究了二氯甲烷（CH2Cl2）光电离及其解离电离的动力学过程，测得CH2Cl2的电离能（IP）为11．32士0．01eV．通过对CH2Cl2光解离电离过程产生的碎片离子的出现势（AP）的测定，并结合有关中性分子的热力学数据，估算出该体系中有关离子的标准生成焓、中性分子和离子型分子中的键能及母体离子的解离能（DE）等一系列热力学数据．对CH2Cl2分子VUV光解离电离通道进行了细致的分析．

关键词: 光电离, 解离电离, 离子出现势

Abstract:

The kinetic processes of the photoionization and dissociation ionization of CH2Cl2 have been investigated under supersonic beam conditions using synchrotron radiation. The ionization energy of CH2Cl2 is 11.32l±0.01eV. Based on the measured appearance potentials (AP) of the daughter ions, the formation enthalpies (FE) of the ionic species, the bond dissociation energies (BE) and the dissociation energies (DE) of the parent ion have been estimated. The most possible channels of the VUV photodissociative ionization have been analyzed.

Key words: Photoionization, Dissociation ionization, Appearance potential