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ANALYSIS OF THE HIGH-RESOLUTION JET-COOLED FLUORESCENCE EXCITATION SPECTRA OF THE HIGHER LEVELS IN THE 29 $769 CM^{-1}$ BAND SYSTEM OF ACETALDEHYDE: FURTHER REFINEMENTS OF THE TORSION-INVERSION POTENTIAL CONSTANTS.

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/14000

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Title: ANALYSIS OF THE HIGH-RESOLUTION JET-COOLED FLUORESCENCE EXCITATION SPECTRA OF THE HIGHER LEVELS IN THE 29 $769 CM^{-1}$ BAND SYSTEM OF ACETALDEHYDE: FURTHER REFINEMENTS OF THE TORSION-INVERSION POTENTIAL CONSTANTS.
Creators: Liu, H.; Lim, E. C.; Munoz-Caro, C.; Nino, A.; Judge, R. H.; Moule, D. C.
Issue Date: 1997
Abstract: Acetaldehyde molecules in the first singlet excited state contain two coupled low frequency vibrational modes, $\nu_{14}$ (inversion) and $\nu_{15}$ (torsion). In an earlier paper, $^{m}$ a two dimensional least squares analysis of the first seven bands in the UV spectrum of acetaldehyde jet-cooled vapor gave an excited state barrier to inversion of $585.13 cm^{-1}$ and a torsional barrier of $721.43 cm^{-1}$. A discussion of the results of a vibrational and rotational analysis of 12 additional bands beyond this earlier analysis will be presented. The assignment of the $14^{2}_{0}$ band has changed and the inclusion of the higher members of the torsional mode has given refined values for the barriers.
URI: http://hdl.handle.net/1811/14000
Other Identifiers: 1997-RI-04
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