Rotational spectroscopy of single carbonyl sulfide molecules embedded in superfluid helium nanodroplets
Date
2009
Authors
Lehnig, R.
Raston, P.
Jager, W.
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Journal article
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Faraday Discussions, 2009; 142:297-309
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Rudolf Lehnig, Paul L. Raston and Wolfgang Jäger
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Abstract
The pure rotation spectrum of carbonyl sulfide embedded in superfluid helium nanodroplets was measured in the frequency range from 4 to 15.5 GHz. Four lines, corresponding to the J = 1–0, J = 2–1, J = 3–2, and J = 4–3 transitions, were found. The line widths of the transitions increase with increasing rotational quantum number J, which is indicative of a distribution of the effective B rotational constant. A comparison of the pure rotational spectrum with the microwave-infrared double resonance spectrum [S. Grebenev, M. Havenith, F. Madeja, J. P. Toennies, and A. F. Vilesov, J. Chem. Phys., 2000, 113(20), 9060] reveals that the double resonance measurement scheme probes predominantly rotational transitions within the vibrationally excited state.
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© The Royal Society of Chemistry 2009