HIGH-RESOLUTION SPECTROSCOPY OF THE (0,2) AND (6,9) BANDS OF THE $B^{4}\Sigma^{-}_{u} \leftarrow X^{4}\Sigma^{4}_{g}$ TRANSITION OF $C^{+}_{2}$
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Date
2003
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Publisher
Ohio State University
Abstract
The first electronic spectrum of the molecular ion $C^{+}_{2}$ was recorded in 1984 by O'Keefe et. al. in a beam of mass selected $ions^{a}$. Three years later, Maier and coworkers did an extensive analysis on several bands of the $B \leftarrow X system^{bcd}$. While their spectra showed several perturbations, the low resolution of their experiment hindered the analysis of the perturbation and the quartet spitting. In 1993, Zackrisson and Royen obtained a high resolution spectrum of the (0,1) band and determined the molecular constants and perturbation $parameters^{e}$. In the work that follows, velocity modulation with heterodyne detection has been used to record the (0,2) and (6,9) bands of the $B \leftarrow X$ system of $C^{+}_{2}$. The (0,2) band has been rotationally analyzed and the spectrum shows perturbations which are attributed to an interaction between the $B^{4}\Sigma^{-}_{u}$ and the $2^{2}\Pi_{u}$ states. Molecular constants and perturbation parameters have been obtained.
Description
$^{a}$A. O'Keefe, R. Derai, and M. T. Bowers, Chem. Phys. 91, 161 (1984) $^{b}$M. R\""{o}sslein, M. Wyttenbach, and J. P. Maier, J. Chem. Phys. 87, 6770 (1987) $^{c}$J. P. Maier and M. R\""{o}sslein, J. Chem. Phys. 88, 4614 (1988) $^{d}$F. G. Celil and J. P. Maier, Chem. Phys. Lett. 166, 517 (1990) $^{e}$M. Zackrisson and P. Royen, J. Mol. Spectrosc. 161, 1 (1993)
Author Institution: Department of Chemistry, Department of Astronomy and Astrophysics, and the Enrico Fermi Institute, University of Chicago
Author Institution: Department of Chemistry, Department of Astronomy and Astrophysics, and the Enrico Fermi Institute, University of Chicago