Physics
Scientific paper
Jun 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010mss..confemj05f&link_type=abstract
"International Symposium On Molecular Spectroscopy, 65th Meeting, Held 21-25 June, 2010 at Ohio State University. http://molspec
Physics
Atmospheric Species And Processes
Scientific paper
While the fundamental bands of ethylene have been studied at high resolution, most of the combination bands have not been recorded. In this study, we have recorded the 12C_2H_4 bands in the 1820 to 2300 cm-1 region which consists of a myriad of weak combination bands. Over 10,000 lines were measured. The strongest of these bands are the A-type band, ν_7+ν_8, centered at 1889 cm-1, the A-type band, ν_6+ν_1_0, at 2048 cm-1, and the B-type band, ν_3+ν_1_0, at 2173 cm-1. In addition, there are numerous lines from much weaker bands. All the bands observed are perturbed by Coriolis interactions, and, at this point, we are attempting to fit all the lines to within experimental error using an Hamiltonian matrix including eigth vibrational states among which four are dark states . The most striking resonance is that of the ν_7+ν_8 band whose energy levels are crossed by the very much weaker ν_4+ν_8 band where the intensities of the K=7 lines are enhanced due to mixing with the stronger band.
Flaud Jean-Marie
Kwabia Tchana F.
Lafferty Walter J.
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