Study of the R-branch of the 3n3 band of 13CH4 in the 1 mm region
V.I. Serdyukov, L.N. Sinitsa, N.M. Emelyanov
V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, Tomsk, Russia
Keywords: Fourier spectroscopy, absorption spectrum, methane, line identification, 3 band
Abstract
The absorption spectrum of 13CH4 in the range from 9000 to 9200 cm-1 is studied using a Bruker IFS-125M Fourier spectrometer at temperatures from 208 to 296 K. The lines of the R-branch of the 3ν313CH4 band are identified up to the rotational quantum number J = 11. The list of identified lines includes nine previously unknown lines with high rotational quantum numbers. For the first time, 32 levels of the state (0030) of the 13CH4 molecule were interpreted according to the symmetry types ( А1, А2, F1, F2, E ) up to J = 10.
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