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Role of Helium Droplets in Mass Spectra of Diatomics: Suppression of Dissociative Reactions
Andrew M. Ellis,Sheng-fu Yang*
Author NameAffiliationE-mail
Andrew M. Ellis The Nanochemistry Group, Department of Chemistry, University of Leicester, Leicester LE1 7RH, UK  
Sheng-fu Yang* The Nanochemistry Group, Department of Chemistry, University of Leicester, Leicester LE1 7RH, UK sfy1@le.ac.uk 
Abstract:
It is generally accepted that electron impact of doped helium nanodroplets initially produces a positively charged helium atom, which then ionizes the dopant if the two come into contact. In effect the He+ can initiate ion-molecule reactions. However, the effect of the surrounding helium on ion-molecule reactions remains ambiguous. To explore this, electron-induced chemistry has been investigated for the diatomic molecules O2, CO and N2. The helium is found to significantly suppress dissociative ion product channels.
Key words:  Helium nanodroplets, Electron impact, Charge transfer, Dissociative reaction
FundProject:
液氦滴对双原子分子质谱的作用:抑制解离反应
Andrew M. Ellis,杨生福*
摘要:
使用电子冲击的方法电离液氦纳米滴中添加的分子通常首先产生一个氦离子,随后这个氦离子在遇到其他分子之后将电荷转移到分子上,并将该分子电离.为了明确在该过程中,在分子周围的液氦纳 米滴对该分子解离反应的影响和液氦纳米滴对电荷转移反应的作用,测量了在液氦纳米滴中分别加入氧气、氮气和一氧化碳的质谱.结果表明,液氦纳米滴几乎完全抑制了解离反应的发生.
关键词:  氦纳米滴,电子冲击,电荷转,移解离反应
DOI:10.1063/1674-0068/28/cjcp1504057
分类号: