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Raman depolarization ratios of jet-cooled benzene and its dimer by stimulated Raman—UV optical double-resonance spectroscopy

Authors
Journal
Chemical Physics Letters
0009-2614
Publisher
Elsevier
Publication Date
Volume
199
Identifiers
DOI: 10.1016/0009-2614(92)80045-d
Disciplines
  • Physics

Abstract

Abstract By the use of double resonance of stimulated Raman pumping and mass-selected resonance enhanced multiphoton ionization, the depolarization ratios of the Raman bands of jet-cooled benzene and its dimer have been measured for the first time. The depolarization ratio of the totally symmetric ring breathing vibration (mode 1) showed a drastic change upon dimer formation. We found two kinds of dimer which give different depolarization ratios of ϱ = 0.1 and 0.02. By applying the model proposed by Hyodo and Fujiyama, the dimers of ϱ = 0.1 and 0.02 were concluded to be those having different intermolecular distances of 3.6 and 5 Å, respectively.

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