摘要
此文介绍了一种产生惰性气体高价离子的新方法。在飞行时间质谱仪(TOF-MS)上,把聚焦后的308nm激光掠射到不锈钢栅网上,产生超短脉冲的电子束,利用这种电子束来轰击惰性气体(He,Ne,Ar,Kr,Xe),产生高价离子,并给出了这些离子的飞行时间质谱。这些高价离子可能是电子逐次电离气体原子产生的。这种方法可作为飞行时间质谱的一种理想的“软电离”的“点”
We introduce a novel method for producing multiple ionization of He, Ne, Ar, Kr and Xe. A nanosecond pulsed electron beam with large number density, which could be energy controlled, was produced by incidencing a focused 308nm laser beam onto a stainless steel grid. On Time of Flight Mass Spectometer, using this electon beam, we obtained multiple ionization of noble gas He, Ne, Ar and Xe. Time of fight mass spectra of these ions were given out. These ions were supposed to be produced by step by step ionization of the gas atoms by electron beam impact. This method may be used as a ideal soft ionizing point ion source in Time of Flight Mass Spectrometer.
出处
《原子与分子物理学报》
CAS
CSCD
北大核心
1997年第2期277-282,共6页
Journal of Atomic and Molecular Physics
关键词
飞行时间质谱
惰性气体
高价离子
TOF MS Nanoosecond pulsed electron beam Noble gas Multiple ionized ions