THE VIBRONIC STRUCTURE OF THE $\tilde{X}^{2}\Pi_{g}$, $\tilde{A}^{2}\Pi_{u}$, AND $\tilde{B}^{2}\Sigma^{+}_{u}$ STATES OF $CO_{2}^{+}$
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Date
1975
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Publisher
Ohio State University
Abstract
The electronic emission spectrum of $CO_{2}^{+}$ has been photographed under high resolution. Analysis of the 4 vibronic sub-bands of the 010--010 transition of $\tilde{B}^{2}\Sigma^{+}_{u}$ $\rightarrow$ $\tilde{X}^{2}\Pi_{g}$ yields the bending frequencies and Renner-Teller parameter. Vibronic analysis of the $\tilde{A}^{2}\Pi_{u}$ - $\tilde{X}^{2}\Pi_{g}$ transition has been undertaken. The deperturbation of the Fermi diad 100--020 of the $\tilde{X}^{2}\Pi_{g}$ state provides a good test of the theory of Fermi resonance in Linear triatomic molecules in $\Pi$ electronic $states.^{1}$ large anharmonic effects are found for the vibrational interval and Renner-splitting of the $v^{\prime}_{2}$ = 1 and 2 levels of $\tilde{X}^{2}\Pi_{g}$.
Description
$^{1}$J. T. Hougen, J. Chem. Phys. 37, 403 (1962).""
Author Institution: Laboratoire de Photophysique Mol\'{e}culaire Batiment 213
Author Institution: Laboratoire de Photophysique Mol\'{e}culaire Batiment 213