Line-shape parameters of H2O perturbed by N2 in the ~22000 cm-1 region

Viktor I. Serdyukov; Leonid N. Sinitsa; Anna S. Dudaryonok; Nina N. Lavrentieva; Nikolay A. Lavrentiev

doi:10.1117/12.2575716

12 November 2020 Line-shape parameters of H₂O perturbed by N₂ in the ~22000 cm^-1 region

Viktor I. Serdyukov, Leonid N. Sinitsa, Anna S. Dudaryonok, Nina N. Lavrentieva, Nikolay A. Lavrentiev

Proceedings Volume 11560, 26th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics; 115600F (2020) https://doi.org/10.1117/12.2575716
Event: 26th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, 2020, Moscow, Russian Federation

Abstract

Water vapor line broadening and shifting coefficients by nitrogen pressure were studied in the 22300-22600 cm^-1 spectral range (6ν₁+ν₃ and 7ν₁ bands) using a high resolution Fourier-transform spectrometer IFS-125M. Measurements were performed using IFS-125M Fourier transform spectrometer with a spectral resolution of 0.1 cm^-1 and optical path length of 24 m. The Doppler FWHM in this region is ~0.066 cm^-1. Calculations of N₂-broadening coefficients were performed using a semi-empirical approach developed by using anharmonic wavefunctions determined from variational nuclear motion calculations. In this variant all scattering channels induced by collisions are taken into account.

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Viktor I. Serdyukov, Leonid N. Sinitsa, Anna S. Dudaryonok, Nina N. Lavrentieva, and Nikolay A. Lavrentiev "Line-shape parameters of H₂O perturbed by N₂ in the ~22000 cm^-1 region", Proc. SPIE 11560, 26th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, 115600F (12 November 2020); https://doi.org/10.1117/12.2575716

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