Brown, L. R.

Crawford, T. J.

Mantz, A. W.

Nikitin, Andrei V.

Rey, Michaël

Smith, M. A. H.

Sung, K.

Tashkun, Sergey A.

Tyuterev, Vladimir G.

English

Tomsk State University Repository

HRMS, 24th Colloquium, Dijon, France, 24 - 28 Aug, 2015MEASUREMENT AND MODELING OF COLD 13CH4 SPECTRA FROM2.1 TO 2.7 µML.R. BROWN, K. SUNG, T.J. CRAWFORD, Jet Propulsion Laboratory,California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109,USA; A. V. NIKITIN, S. A. TASHKUN, Tomsk State University, 36 Lenin Avenue,634050 Tomsk, Russian Federation and V.E. Zuev Institute of Atmospheric OpticsSB RAS, 1, Akademician Zuev square, 634021 Tomsk, Russia; M. REY,Vl.G. TYUTEREV, Groupe de Spectrome´trie Mole´culaire et Atmosphe´rique, UMRCNRS 7331, UFR Sciences BP 1039, 51687 Reims Cedex 2, France; M.A.H.SMITH, Science Directorate, NASA Langley Research Center, Hampton, VA 23681,USA; A.W. MANTZ, Dept. of Physics, Astronomy and Geophysics, ConnecticutCollege, New London, CT 06320, USAA new study of 13CH4 line intensities and positions in the Octad region between3600 and 4800 cm−1 will be reported. Nine spectra were recorded with two Fouriertransform spectrometers (the McMath-Pierce FTS at Kitt Peak Observatory and theBruker 125 HR FTS at the Jet Propulsion Laboratory) using 13C-enriched samplesat temperatures from 299 K to 80 K. Line positions and intensities were retrievedby non-linear least squares curve-fitting procedures and analyzed using the effectiveHamiltonian and the effective Dipole moment expressed in terms of irreducible ten-sor operators adapted to spherical top molecules. Quantum assignments were foundfor all the 24 sub-vibrational states of the Octad (some as high as J=10). Over 4750experimental line positions and 3300 line intensities were fitted with RMS standarddeviations of 0.004 cm−1 and 6.9 %, respectively. A new linelist of over 9600 mea-sured positions and intensities from 3607 to 4735 cm−1 was produced, with knownquantum assignments given for 45 % of the features.Part of the research described in this paper was performed at the Jet PropulsionLaboratory, California Institute of Technology, NASA Langley Research Center, andConnecticut College, under contracts and cooperative agreements with the NationalAeronautics and Space Administration. The support of the Groupement de RechercheInternational SAMIA between CNRS (France) and RFBR (Russia) is acknowledgedp-number: p186 Submitted on Sun Jun 14 19:28:27 CEST 2015

Measurement and modelling of cold 13CH4 spectra from 2.1 to 2.7 μm

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Measurement and modelling of cold 13CH4 spectra from 2.1 to 2.7 μm

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