Astrophysics and Space Science

, Volume 236, Issue 1, pp 19–27 | Cite as

Preparation, collisional decay and transfer of alignment in C2H2 21

  • J. B. Halpern
  • Ralf Dopheide
  • Helmut Zacharias


Stimulated Raman scattering is used to prepare ensembles of aligned acetylene molecules in thev2=1 excited vibrational level. Decay and transfer of the alignment is followed by laser induced fluorescence. Measurements of the initially excited alignment agree well with theoretical calculations. The rate constants for decay decrease as the rotational quantum numberJ of the excited level increases.


C2H2 Acetylene Theoretical Calculation Raman Scattering Level Increase 
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Copyright information

© Kluwer Academic Publishers 1996

Authors and Affiliations

  • J. B. Halpern
    • 1
  • Ralf Dopheide
    • 2
  • Helmut Zacharias
    • 2
  1. 1.Department of ChemistryHoward UniversityWashington, DCUSA
  2. 2.Fachbereich PhysikUniversität GH EssenEssenGermany

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