Self-, air, and noble gas broadening in rotational-vibrational bands of SO2, H2S, and NO2

Bernd Sumpf

doi:10.1117/12.267757

3 March 1997 Self-, air, and noble gas broadening in rotational-vibrational bands of SO₂, H₂S, and NO₂

Bernd Sumpf

Proceedings Volume 3090, 12th Symposium and School on High-Resolution Molecular Spectroscopy; (1997) https://doi.org/10.1117/12.267757
Event: 12th Symposium and School on High Resolution Molecular Spectroscopy, 1996, St. Petersburg, Russian Federation

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 K_aⁿ 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.

Citation Download Citation

Bernd Sumpf "Self-, air, and noble gas broadening in rotational-vibrational bands of SO₂, H₂S, and NO₂", Proc. SPIE 3090, 12th Symposium and School on High-Resolution Molecular Spectroscopy, (3 March 1997); https://doi.org/10.1117/12.267757

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