Acta Phys. -Chim. Sin. ›› 1994, Vol. 10 ›› Issue (09): 838-840.doi: 10.3866/PKU.WHXB19940913

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High Resolution Multiphoton Ionization Photoelectron Spectra of OCS

Yang Da-Lin, Ding Chuan-Fan, Zhou You, Cai Hui, Zhu Qi-He   

  1. State Key Laboratory of Molecular Reaction Dynamics,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100080
  • Received:1993-04-05 Revised:1993-04-22 Published:1994-09-15
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Abstract:

Using a Nd:YAG pumped pulsed dye laser-wavelength extender as UV light source, the multiphoton ionization of o CS was studied in a supersonic molecular beam with a Time of Flight mass spectrometer and a Magnetic Bottle Time of Flight photoelectron spectrometer. The intermediate resonant states of OCS were obtained from the mass selected MPI spectra by scanning the laser wavelength. From 2+1 MPI photoelectron spectra at different resonant wavelength the vibrational levels of OCS+ ion in electronic ground state X2 H3/2,1/2 were assigned and their X2II spin-orbital splitting was determined to be 0.046eV. The non Franck-Condon behavior between the Rydberg intermediate state and the ionic state has been discussed.

Key words: Carbonyl sulfide, Multiphoton ionization, Multiphoton ionization spectroscopy, Photoelectron spectroscopy