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12 November 2020 Line assignment of the 13CH4 ν2 +2ν3 band at low temperature
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Proceedings Volume 11560, 26th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics; 1156008 (2020) https://doi.org/10.1117/12.2575487
Event: 26th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, 2020, Moscow, Russian Federation
Abstract
The 13CH4 absorption spectra in the range between 7400 and 7600 cm-1 have been recorded at 4 temperatures from 296 K to 200 K using a Fourier transform spectrometer at pressures from 91 to 300 hPa, and at a 0.03 cm-1 spectral resolution. A 220 long cm cell was used, which provided a threshold sensitivity to absorption of the order of 10-6 cm-1. Empirical values of the lower state energy levels were derived from the intensity ratios of the lines measured at 200 K, 254 K, 296 K and 305 K. Line assignment of the ν2 +2ν3 band of the 13CH4 molecule was performed.
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L. N. Sinitsa, V. I. Serdyukov, A. A. Lugovskoi, and I. L. Baranovskaya "Line assignment of the 13CH4 ν2 +2ν3 band at low temperature", Proc. SPIE 11560, 26th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, 1156008 (12 November 2020); https://doi.org/10.1117/12.2575487
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