Line assignment of the 13CH4 ν2 +2ν3  band at low temperature

L. N. Sinitsa; V. I. Serdyukov; A. A. Lugovskoi; I. L. Baranovskaya

doi:10.1117/12.2575487

12 November 2020 Line assignment of the ¹³CH₄ ν₂ +2ν₃ band at low temperature

L. N. Sinitsa, V. I. Serdyukov, A. A. Lugovskoi, I. L. Baranovskaya

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.

Citation Download Citation

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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