摘要
在分析了实验记录的大量原子簇离子质谱的基础上，发现原子簇的正负离子通常表现为不同的统计分布形式．将它们的分布形式与求解动力学方程得出的分布函数相比，发现由此反映了原子簇正负离子的不同的生成机理：实验所检测的原子簇正离子在许多情况下仅经历了聚合与解离反应，主要是中性原子簇分子电离后的产物；而相应的原子簇负离子则是经历了一系列离子一分子反应后的产物．
The statistical distribution approach has been successfully applied to the study of formation mechanism and structural conversions of cluster ions. From analysis of the recorded mass spectra of cluster ions with different compositions, it is found that the statistical distributions of Positive and negative cluster ions are generally different. Comparing their distributions with the distribution functions solved from the kinetic equations for the formations of the cluster molecules and ions, different formation mechanisms for the positive and negative cluster ions can be suggested: The positive cluster ions are generated from the ionization of the relative neutral species, so they only experience the aggregation and dissociation processes; while the negative cluster ions are the products of a series of ion -molecular reactions.
出处
《分子科学学报》
CAS
CSCD
1997年第2期65-70,共6页
Journal of Molecular Science
基金
国家杰出青年科学基金
国家教委"跨世纪优秀人才计划"基金
关键词
原子簇离子
统计分布
生成机理
动力学方程
Cluster ions
Statistical distribution
Formation mechanism
Kinetics equation
