The 12CH4 absorption spectra at 296 K and 200 K in the range between 6000 and 9000 cm-1

V. I. Serdyukov Sr.; L. N. Sinitsa Sr.; A. A. Lugovskoi; N. M. Emel'yanov Sr.

doi:10.1117/12.2504316

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13 December 2018 The ¹²CH₄ absorption spectra at 296 K and 200 K in the range between 6000 and 9000 cm^-1

V. I. Serdyukov Sr., L. N. Sinitsa Sr., A. A. Lugovskoi, N. M. Emel'yanov Sr.

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Proceedings Volume 10833, 24th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics; 1083309 (2018) https://doi.org/10.1117/12.2504316
Event: XXIV International Symposium, Atmospheric and Ocean Optics, Atmospheric Physics, 2018, Tomsk, Russian Federation

Abstract

The 12CH4 absorption spectra in the range between 6600 and 12000 cm^-1 have been recorded at 296 K and 200 K by the Fourier spectrometer IFS – 125M at pressures from 11 to 300 mbar, and spectral resolution 0.03 cm^-1. Low temperature cell with a length of 220 cm was used, which provided the threshold sensitivity to absorption of the order of 10^-7 cm^-1. Empirical values of the lower state energy level were derived from the intensity ratios of the lines measured at 200 K and 296 K. Line assignment of the the 3ν₃ band of the ¹²CH₄ molecule was performed. The parameters of Voigt contour (the line center, intensity) were determined using multi-fitting procedure at 296K.

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V. I. Serdyukov Sr., L. N. Sinitsa Sr., A. A. Lugovskoi, and N. M. Emel'yanov Sr. "The ¹²CH₄ absorption spectra at 296 K and 200 K in the range between 6000 and 9000 cm^-1", Proc. SPIE 10833, 24th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 1083309 (13 December 2018); https://doi.org/10.1117/12.2504316

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