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EXTENDED ASSIGNMENTS, VIBRATIONAL COUPLING, AND MODELING FOR THE C-O STRETCH BAND OF $CH_{3}OH$

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/19474

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dc.creator Lees, R. M. en_US
dc.creator Xu, Hong en_US
dc.date.accessioned 2006-06-15T19:21:19Z
dc.date.available 2006-06-15T19:21:19Z
dc.date.issued 1999 en_US
dc.identifier 1999-TF-09 en_US
dc.identifier.uri http://hdl.handle.net/1811/19474
dc.description Author Institution: Department of Physics, University of New Brunswick; Department of Physical Sciences, University of New Brunswick en_US
dc.description.abstract The Fourier transform spectrum of the CO-stretching fundamental of $CH_{3}OH$ has been re-examined at higher pressure and path length than heretofore in a study of the lower modes over the $930-1400 cm^{-1}$ region. With the increase in spectral sensitivity, it has been possible to assign a significant number of new subbands for torsionally excited $\nu_{t} = 1$ and $\nu_{t} = 2$ substates, plus some high-K subbands for the $\nu_{t} = 0$ torsional ground state. Assignments have also been extended to higher J for most of the previously known subbands. We have observed a number of new J-localized resonances arising from level-crossings with other torsion-vibration modes. The partner levels have been identified and the interactions characterized for some of the resonances, while others remain mysterious. We are exploring the extent to which the unperturbed CO-stretching levels can be modelled by an effective Hamiltonian of the multi-parameter type used successfully to fit the ground state. So far, 1620 lines have been fitted with a weighted standard deviation of 100 corresponding to a mean residual of approximately $0.02 cm^{-1}$, still some distance from experimental uncertainty. en_US
dc.format.extent 113465 bytes
dc.format.mimetype image/jpeg
dc.language.iso English en_US
dc.title EXTENDED ASSIGNMENTS, VIBRATIONAL COUPLING, AND MODELING FOR THE C-O STRETCH BAND OF $CH_{3}OH$ en_US
dc.type article en_US