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Vol. 33, issue 09, article # 2

Sinitsa L. N., Serdyukov V. I., Lugovskoy A. A. Low-temperature absorption spectrum of the (0120)–(0000) 13CH4 band. Line assignment. // Optika Atmosfery i Okeana. 2020. V. 33. No. 09. P. 668–676. DOI: 10.15372/AOO20200902 [in Russian].
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Abstract:

The 13CH4 absorption spectra in the range between 7400 and 7600 cm-1 have been recorded at for temperatures from 296 to 200 K by the Fourier spectrometer IFS-125M at a spectral resolution of 0.03 cm-1. A 220 cm cell was used, which provided a threshold sensitivity to absorption on the order of 10-6 cm-1. Line assignment of the ν2 + 2ν3 band of the 13CH4 molecule was performed. Rotational constants of the (0120) state and the integral intensity of the ν2 + 2ν3 13CH4 band were determined for the first time.

Keywords:

CH4, absorption spectrum, low-temperature cell, line assignment

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