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Proceedings Paper

Self-, air, and noble gas broadening in rotational-vibrational bands of SO2, H2S, and NO2
Author(s): Bernd Sumpf
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Paper Abstract

Beside the knowledge of line positions and strengths precise data on the line broadening are prerequisite for the analysis of atmospheric transmission spectra and the in-situ determination of trace gas concentrations. Moreover, experimental data on the line broadening provide information on the collision processes as origin of broadening and shift of absorption lines. In this paper result on the line broadening obtained with a pulse driven diode laser spectrometer are presented. Intensive studies of the self- broadening were carried out for the v1, v3, and v1 plus v3 bands of SO2, the v1, v2, v3, and 2v2 bands of H2S, and the v3 band of NO2 in order to analyze the quantum number dependence of the broadening coefficients. For SO2 a pronounced decrease of the broadening coefficients with increasing quantum number Kan was found. In the case of H2S the Jn-dependence dominates, whereas in the case of NO2 a trend is not obvious. To study the perturber dependence of the broadening, air, He, Ne, Ar, Kr, and Xe were included in the experiments. The tendencies observed for noble gas perturbers could be described theoretically with a modified Anderson-Tsao-Curnutte-theory.

Paper Details

Date Published: 3 March 1997
PDF: 12 pages
Proc. SPIE 3090, 12th Symposium and School on High-Resolution Molecular Spectroscopy, (3 March 1997); doi: 10.1117/12.267757
Show Author Affiliations
Bernd Sumpf, Technische Univ. Berlin (Germany)


Published in SPIE Proceedings Vol. 3090:
12th Symposium and School on High-Resolution Molecular Spectroscopy
Leonid N. Sinitsa; Yurii N. Ponomarev; Valery I. Perevalov, Editor(s)

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