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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
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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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