Experimental study of temperature-dependence laws of non-Voigt absorption line shape parameters

Wilzewski, Jonas

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https://hdl.handle.net/2142/97188 Copy

Description

Title

Experimental study of temperature-dependence laws of non-Voigt absorption line shape parameters

Author(s)

Wilzewski, Jonas

Contributor(s)

• Wagner, Georg
• Loos, Joep
• Birk, Manfred

Issue Date

2017-06-21

Keyword(s)

• Lineshapes
• Collisional effects

Abstract

To improve the understanding of temperature-dependence laws of spectral line shape parameters, spectra of the $nu_3$ rovibrational band of CO$_2$ perturbed by 10, 30, 100, 300 and 1000~mbar of N$_2$ were measured 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 implementationfootnote{Ngo textit{et al.} JQSRT textbf{29}, 89-100 (2013); JQSRT textbf{134}, 105 (2014).}footnote{Tran textit{et al.} JQSRT textbf{129}, 199-203 (2013); JQSRT textbf{134}, 104 (2014).} extended to account for line mixing in the Rosenkranz approximation by means of a multispectrum fitting approach developed at DLRfootnote{Loos textit{et al.}, 2014; http://doi.org/10.5281/zenodo.11156.}. This enables high accuracy parameter retrievals to reproduce the spectra down to noise level and we will present the behavior of line widths, shifts, speed-dependence-, collisional narrowing- and line mixing-parameters over this 140~K temperature range.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

eng

Permalink

http://hdl.handle.net/2142/97188

DOI

https://doi.org/10.15278/isms.2017.WJ03

Copyright and License Information

Copyright 2017 Jonas Wilzewski

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