TY  - SER
AU  - Thomas,Xavier
AU  - Daumont,Ludovic
AU  - Rey,Michaël
AU  - Sung,Keeyoon
AU  - Toon,G.C.
AU  - Smith,M.A.H.
AU  - Mantz,Arlan W.
AU  - Protasevich,Alexander E.
AU  - Tashkun,Sergey A.
AU  - Nikitin,Andrei V.
AU  - Tyuterev,Vladimir G.
TI  - Assignment and modelling of 12CH4 spectra in the 5550-5695, 5718-5725 and 5792-5814 cm-1 regions
KW  - спектры высокого разрешения
KW  - метан
KW  - инфракрасная Фурье-спектроскопия
KW  - колебательно-вращательные состояния
KW  - инфракрасное поглощение
KW  - эффективный гамильтониан
KW  - статьи в журналах
N2  - A new study of 12CH4 line positions and intensities was performed for the Tetradecad regions 5550,000–5695.250, 5718.8–5724.250 and 5792.36–5814.290 cm−1 using long path (202 m, 602 m, 1604 m and 1804 m) spectra of normal samples of CH4 at different pressures recorded with a Fourier transform spectrometer in Reims, France. Line positions and intensities were retrieved by least squares curve-fitting procedures and analyzed using the effective Hamiltonian and the effective dipole moment expressed in terms of irreducible tensor operators adapted to spherical top molecules. An 80 K spectrum recorded in Jet Propulsion Laboratory (JPL), Pasadena, of enriched 12CH4 was used for low-J line positions. Another 80 K spectrum of enriched 13CH4 from JPL was used to discern the isotopic lines. A new measured linelist contains positions and intensities for 5819 features. Quantum assignments were made for more than 3400 transitions, which represent ∼95% of the integrated line intensity observed in this region. All assigned 3445 line positions were fitted with RMS standard deviations of 0.0024 cm−1. The sum of observed intensities between 5550 and 5695 cm−1 fell within 2% of the predicted value from ab initio variational calculations reported in the TheoReTS database (http://theorets.univ-reims.fr; http://theorets.tsu.ru)
UR  - http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000790108
ER  -