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Citation: . Multiphoton lonization of Diethylamine:"Ladder Switching"Model[J]. Acta Physico-Chimica Sinica, ;1998, 14(03): 270-274. doi: 10.3866/PKU.WHXB19980316 shu

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 Date: 16 June 1997
Available Online: 15 March 1998

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.
- Diethylamine,
- Multiphoton ionization,
- Time-of-fight mass spectra
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