物理化学学报 >> 1998, Vol. 14 >> Issue (03): 270-274.doi: 10.3866/PKU.WHXB19980316

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二乙胺分子的多光子电离："梯转换"过程

魏杰, 方黎, 章莲蒂, 郭文跃, 张树东, 姜芸芸, 蔡继业   

  1. 中国科学院安徽光学精密机械研究所 激光光谱开放实验室，合肥 230031
  • 收稿日期:1997-06-16 修回日期:1997-10-20 发布日期:1998-03-15
  • 通讯作者: 魏杰

Multiphoton lonization of Diethylamine:"Ladder Switching"Model

  

  1. Laser Spectroscopy Laboratory,Anhui Institute of Optics and Fine Mechanics,The Chinese Academy of Sciences,Heifei 230031
  • Received:1997-06-16 Revised:1997-10-20 Published:1998-03-15
  • Contact: Wei Jie

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关键词: 二乙胺, 多光子电离, 飞行时间质谱

Abstract:

The multiphoton ionization (MPI) of diethylamine is first reported in this paper. A time-of-flight mass spectrometer was used in the experiment under collision-free condition. MPI mass spectra were measured in the region of 464 ～486 nm using a dye laser and at double frequency of a Nd:YAG laser. Molecular ion was created through resonance enhanced multiphoton ionization (REMPI) via Rydberg states. Fragment, ion distribution was formed through “ladder switching” process. The experimental demonstration of the process is reported for the first time by the discussion of dependence of ion relative, abundance on laser wavelength and energy. The competition between further up-pumping and fragmentation of Parent ion also exists, and higher laser intensity favors the former.

Key words: Diethylamine, Multiphoton ionization, Time-of-fight mass spectra