Linewidth, lineshift, and lineshape measurements on rotational transitions of OCS using frequency modulation

Measurements of several rotational transitions of OCS have been performed using frequency modulation with second harmonic detection. We determined the resonance frequencies of these transitions very precisely. The measurements clearly show the absence of detectable collision-induced shifts. We prese...

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Bibliographic Details
Published inJournal of molecular spectroscopy Vol. 128; no. 2; pp. 509 - 520
Main Authors de Vreede, J.P.M., Gillis, M.P.W., Dijkerman, H.A.
Format Journal Article
LanguageEnglish
Published San Diego, CA Elsevier Inc 01.04.1988
Elsevier
Subjects
Atomic and molecular physics
Exact sciences and technology
Intensities and shapes of molecular spectral lines and bands
Molecular properties and interactions with photons
Physics
Modulation spectrometry
Rotational transition
Collision
Theoretical study
Doppler effect
Experimental study
Spectral line shift
Voigt function
Absorption spectrum
Inorganic compound
Second harmonic
Spectral line profile
Carbonyl Sulfides
Microwave spectrum
Spectral line broadening
Vibrationally excited state
Triatomic molecule
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Summary:Measurements of several rotational transitions of OCS have been performed using frequency modulation with second harmonic detection. We determined the resonance frequencies of these transitions very precisely. The measurements clearly show the absence of detectable collision-induced shifts. We present a procedure for correcting the data for errors caused by variation in the power of the radiation source, by variation in the effective path length and by harmonic distortion in the modulation process. Observed deviations from the Voigt lineshape are discussed.
ISSN:0022-2852
1096-083X
DOI:10.1016/0022-2852(88)90166-X