6533b7d5fe1ef96bd1263d18
RESEARCH PRODUCT
The vibrational levels of methane obtained from analyses of high-resolution spectra
Vincent BoudonMichel LoeteM. Reysubject
Absorption spectroscopy01 natural sciencesSpectral lineMethanesymbols.namesakechemistry.chemical_compoundvibrational levels and sublevels0103 physical sciencesIsotopologuepolyads010303 astronomy & astrophysicsSpectroscopyPhysics[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph]Radiation010304 chemical physicsmethanepotential surfaceRotational–vibrational spectroscopyAtomic and Molecular Physics and OpticsMathematical Operatorschemistry[ PHYS.PHYS.PHYS-AO-PH ] Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph]TetrahedronsymbolsAtomic physicsHamiltonian (quantum mechanics)tensorial formalismdescription
International audience; Methane and its tetrahedral isotopologues are spherical-top molecules whose high-resolution rovibrational spectra can only be analyzed in detail, thanks to sophisticated symmetry-adapted tensorial models. However, the effective Hamiltonian parameters of such models do not give direct access to the positions of the vibrational sublevels. In this paper, we present a calculation of the vibrational level positions for 12CH4, 13CH4, 12CD4 and 13CD4 performed using the effective Hamiltonian parameters obtained through recent analyses. We also include the results of a re-analysis of the octad system of 12CH4 performed with a higher order of the development which slightly improves the previous work on this polyad.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2006-04-01 |