Temperature-dependence laws of absorption line shape parameters of the CO2 nu(3) band

Wilzewski, J. S.; Birk, M.; Loos, J. und Wagner, G. (2018): Temperature-dependence laws of absorption line shape parameters of the CO2 nu(3) band. In: Journal of Quantitative Spectroscopy & Radiative Transfer, Bd. 206: S. 296-305

Abstract

To improve the understanding of temperature-dependence laws of spectral line shape parameters, spectra of the nu(3) rovibrational band of CO2 perturbed by 10, 30, 100, 300 and 1000 mbar of N-2 were recorded at nine temperatures between 190 K and 330 K using a 22 cm long single-pass absorption cell in a Bruker IFS125 HR Fourier Transform spectrometer. The spectra were fitted employing a quadratic speed dependent hard collision model in the Hartmann-Tran implementation extended to account for line mixing in the Rosenkranz approximation by means of a multispectrum fitting approach developed at DLR This enables high accuracy parameter retrievals to reproduce the spectra down to noise level and we present the behavior of line widths, shifts, speed-dependence-, collisional narrowing- and line mixing parameters over this 140 K temperature range.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Physik
• Themengebiete: 500 Naturwissenschaften und Mathematik > 530 Physik
• ISSN: 0022-4073
• Sprache: Englisch