中国物理B ›› 1997, Vol. 6 ›› Issue (10): 725-730.doi: 10.1088/1004-423X/6/10/002

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(2+2)RESONANCE ENHANCED MULTIPHOTON IONIZATION-FRAGMENTATION STUDY OF DIMETHYLAMINE

魏杰, 方黎, 张冰, 郭文跃, 章莲蒂, 张树东, 蔡继业   

  1. Laser Spectroscopy Laboratory,Anhui Institute of Optics and Fine Mechanics,Academia Sinica,Heifei 230031, China
  • 收稿日期:1997-04-23 出版日期:1997-10-20 发布日期:1997-10-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China.

(2+2)RESONANCE-ENHANCED MULTIPHOTON IONIZATION-FRAGMENTATION STUDY OF DIMETHYLAMINE

WEI JIE (魏杰), FANG LI (方黎), ZHANG BING (张冰), GUO WEN-YUE (郭文跃), ZHANG LIAN-DI (章莲蒂), ZHANG SHU-DONG (张树东), CAI JI-YE (蔡继业)   

  1. Laser Spectroscopy Laboratory,Anhui Institute of Optics and Fine Mechanics,Academia Sinica,Heifei 230031, China
  • Received:1997-04-23 Online:1997-10-20 Published:1997-10-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China.

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摘要： The multiphoton ionization spectra of dimethylamine are given in the 445-470 nm region. A time of flight mass spectrometer was used,and experiment was done under collision free condition. It is found that (2+2) resonance enhanced multiphoton ionization through (nN,3s) Rydberg state produces parent ions which endure pseudo-α and C—N bond cleavages. The former forms CH3N+H=CH2 ions,and the latter gives CH2=N+H2 ions .

Abstract: The multiphoton ionization spectra of dimethylamine are given in the 445-470 nm region. A time of flight mass spectrometer was used,and experiment was done under collision free condition. It is found that (2+2) resonance enhanced multiphoton ionization through (nN,3s) Rydberg state produces parent ions which endure pseudo-$\alpha$ and C—N bond cleavages. The former forms CH3N+H=CH2 ions,and the latter gives CH2=N+H2 ions .

中图分类号:  (Multiphoton ionization and excitation to highly excited states (e.g., Rydberg states))

  • 33.80.Rv
33.15.Fm (Bond strengths, dissociation energies) 33.15.Ta (Mass spectra)