物理化学学报 >> 1996, Vol. 12 >> Issue (03): 213-217.doi: 10.3866/PKU.WHXB19960305

研究论文 上一篇    下一篇

原子簇离子解离统计分布的动力学研究

张强,黄荣彬,刘朝阳,郑兰荪   

  1. 固体表面物理华学国家重点实验室,厦门大学化学系,厦门 361005
  • 收稿日期:1995-06-06 修回日期:1995-08-04 发布日期:1996-03-15
  • 通讯作者: 郑兰荪

Dissociation Kinetics and Fragment Distribution of Cluster Ions

Zhang Qiang,Huang Rong-Bin,Liu Zhao-Yang,Zheng Lan-Sun   

  1. Department of Chemistry,Xiamen University,Xiamen 361005
  • Received:1995-06-06 Revised:1995-08-04 Published:1996-03-15
  • Contact: Zheng Lan-Sun

摘要:

对激光产生的原子簇离子,通过质量选择,可以对选出的原子簇离子进行碰撞诱导解离或光解离研究,在对实验记录的解离质谱的分析中发现,同一系列碎片离子的相对丰度分布符合一定的统计规律.不同的统计分布形式对于不同的解离机理,通过求解解离反应的动力学方程,得到碎片高子统计分布的函数表达式,从而可以通过分析解离质谱中碎片离子的统计分布,探讨相应的原子簇离子解离反应的机理.

关键词: 解离, 原子簇离子, 统计分布, 动力学

Abstract:

 Dissociation studies of mass-selected cluster ions have been carried out on a home-made apparatus. From analysis of the recorded dissociation mass spectra, it was found that fragmant distribution of dissociated cluster ions follows a statistical distribution model. In this paper, kinetic equations of two dissociation pathways are discussed and their analytical solutions are presented. Based on the distribution functions, recorded dissociation mass spectra of cluster ions are analyzed and attributed to the different fragmentation channels.

 

Key words: Dissociation, Kinetics, Cluster ions, Statistical distribution