Parameters of broadening of water molecule absorption lines by argon pressure using different profile models
T.M. Petrova1, A.M. Solodov1, A.P. Shcherbakov1, V.M. Deichuli1,2, A.A. Solodov1, Yu.N. Ponomarev1, T.Yu. Chesnokova1
1V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, 1, Academician Zuev square, Tomsk, 634021, Russia
2National Research Tomsk State University, 36, Lenin Avenue, Tomsk, 634050,Russia
Keywords: параметры линий поглощения, молекула воды, Фурье-спектрометр, зависящий от скорости контур Фойгта, absorption line parameters, water vapor, Fourier transform spectrometer, speed-dependent Voigt profile
Abstract
The absorption spectra of water vapor perturbed by Ar pressure have been investigated in the wavenumber range 6700-7650 cm-1. Room temperature spectra of water vapor have been measured by the Bruker IFS 125HR Fourier transform spectrometer with a high signal-to-noise ratio in a wide range of pressure of argon with a spectral resolution of 0.01 cm-1. The fittings with Voigt and speed-dependent Voigt profiles were performed to retrieve the H2O spectral lines parameters. It was shown that the use of the speed-dependent Voigt profile gives the best agreement with experimental data.
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