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HIGH-RESOLUTION SPECTROSCOPY AND PRELIMINARY GLOBAL ANALYSIS OF C--H STRETCHING VIBRATIONS OF C$_2$H$_4$ IN THE 3000 AND 6000 CM$^{-1}$ REGIONS

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/49278

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Title: HIGH-RESOLUTION SPECTROSCOPY AND PRELIMINARY GLOBAL ANALYSIS OF C--H STRETCHING VIBRATIONS OF C$_2$H$_4$ IN THE 3000 AND 6000 CM$^{-1}$ REGIONS
Creators: Gonzalez, M. A. Lorono; Boudon, V.; Loete, M.; Rotger, M.; Bourgeois, M.-T.; Didriche, K.; Herman, M.; Kapitanov, V. A.; Ponomarev, Yu. N.; Solodov, A. A.; Solodov, A. M.; Petrova, T. M.
Issue Date: 2011
Abstract: Ethylene is a naturally occurring compound in ambient air that affects atmospheric chemistry and global climate. The C$_2$H$_4$ spectrum is available in databases only for the 1000 and 3000 cm$^{-1}$ ranges. In this work, {\em J. Quant. Spectrosc. Radiat. Transfer\/}, {\bf 111}, 2265--2278 (2010).}, the ethylene absorption spectrum was measured in the 6030-6250 cm$^{-1}$ range with the use of a high resolution Bruker IFS 125HR Fourier-spectrometer and a two-channel opto-acoustic spectrometer with a diode laser. As a secondary standard of wavelengths, the methane absorption spectrum was used in both cases. A preliminary analysis was realized thanks to the tensorial formalism developed by the Dijon group that is implemented in the XTDS software package, {\bf 251}, 102--113 (2008).}. We considered the two combination bands $\nu_5+\nu_9$ and $\nu_5+\nu_{11}$ as an interacting dyad. Parameters for the $\nu_9/\nu_{11}$ dyad were fitted simultaneously from a re-analysis of previously recorded supersonic expansion jet FTIR data, while parameters for the $v_5=1$ Raman level were taken from literature. More than 600 lines could be assigned in the 6030-6250 cm$^{-1}$ region (and also 682 in the 2950--3150 cm$^{-1}$ region) and effective Hamiltonian parameters were fitted, including Coriolis interaction parameters. The dyad features are globally quite well reproduced, even if there are still problems at high $J$ values.
URI: http://hdl.handle.net/1811/49278
Other Identifiers: 2011-RB-03
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