Two-color resonant four-wave mixing spectroscopy of highly predissociated levels in the ÃA12 state of CH3S
10.1063/1.1867333
Crossref journal-article
AIP Publishing
The Journal of Chemical Physics (317)
Abstract

We report results of two-color resonant four-wave mixing experiments on highly predissociated levels of the methylthio (or thiomethoxy) radical CH3S in its first excited electronic state ÃA12. Following photolysis of jet-cooled dimethyl disulfide at 248nm, the spectra were measured with a hole-burning scheme in which the probe laser excited specific rotational transitions in band 33. The spectral simplification afforded by the two-color method allows accurate determination of line positions and homogeneous linewidths, which are reported for the C–S stretching states 3v(v=3–7) and combination states 113v(v=0–2), 213v(v=3–6), and 11213v(v=0,1) involving the symmetric CH3 stretching (ν1) mode and the CH3 umbrella (ν2) mode. The spectra show pronounced mode specificity, as the homogeneous linewidth of levels with similar energies varies up to two orders of magnitude; ν3 is clearly a promoting mode for dissociation. Derived vibrational wave numbers ω1′, ω2′, and ω3′ of the à state agree satisfactorily with ab initio predictions.

Bibliography

Liu, C.-P., Reid, S. A., & Lee, Y.-P. (2005). Two-color resonant four-wave mixing spectroscopy of highly predissociated levels in the ÃA12 state of CH3S. The Journal of Chemical Physics, 122(12).

Authors 3
  1. Ching-Ping Liu (first)
  2. Scott A. Reid (additional)
  3. Yuan-Pern Lee (additional)
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Dates
Type When
Created 20 years, 5 months ago (March 28, 2005, 6:01 p.m.)
Deposited 2 years, 1 month ago (Aug. 2, 2023, 10:44 p.m.)
Indexed 1 month ago (July 30, 2025, 6:44 a.m.)
Issued 20 years, 5 months ago (March 22, 2005)
Published 20 years, 5 months ago (March 22, 2005)
Published Online 20 years, 5 months ago (March 30, 2005)
Published Print 20 years, 5 months ago (March 22, 2005)
Funders 0

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@article{Liu_2005, title={Two-color resonant four-wave mixing spectroscopy of highly predissociated levels in the ÃA12 state of CH3S}, volume={122}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.1867333}, DOI={10.1063/1.1867333}, number={12}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Liu, Ching-Ping and Reid, Scott A. and Lee, Yuan-Pern}, year={2005}, month=mar }