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Direct evidence for ν1-mode excitation in the infrared multiphoton excitation of SO2

✍ Scribed by Cheng-Zai Lü; Jay Goldman; Shrenik Deliwala; Kuei Hsien Chen; Eric Mazur

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
437 KB
Volume
176
Category
Article
ISSN
0009-2614

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✦ Synopsis

We investigated the infrared multiphoton excitation of SO2 in bulk samples and in a supersonic jet with the 9R1,22), 9R(32), and 9P( 32) CO*-laser lines. Coherent anti-Stokes Raman spectra reveal unambiguously that only the v,-mode at II5 I .3 cm-' is actually pumped; no 2vl overtone pumping at 1035.2 cm-' is observed. From the spectra we directly determine the anharmonic constantsx,,=-3.65+0.06cm-'andx,,=-3.3f0.

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