Acta Phys. -Chim. Sin. ›› 1999, Vol. 15 ›› Issue (05): 436-442.doi: 10.3866/PKU.WHXB19990510

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A Study of the Optical AC Stark Effect and Orientation of C2H2 Rovibrational States (X1∑g+,ν2”=1,J”)

Gao Wen-Bin, Rudert  A D, Martin  J, Zacharis  H, Halpern J.B.   

  1. Hangzhou Insitute of Electronics Engineering,Hangzhou 310037|PhysikalischesInstitute，Universitaet Muenster,Wilhelm-klemm Str.10,48149 Muenster,BRD|Chemistry Department,Howard University,Washington DC 20059 USA
  • Received:1998-08-10 Revised:1998-12-22 Published:1999-05-15
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Abstract:

The selective preparation of C2H2 in discrete rovibrational states of v"2 mode in its electronic ground state (x1Σ+g, v"2 = 1, J") is achieved by stimulated Raman pumping. The optical AC Stark effect and orientation have been observed from the UV laser induced fluorescence signalA1 Au (v'3 = 1, J, ) -X1Σ+ (v", = 1, J") using different polarizations of Raman pumping and probing lasers. The calculated Raman line-shapes based on the Stark profile broadening numerical model agree well with the experimentally measured profiles.

Key words: Stimulated Raman pumping, Optical AC Stark effect, Orientation