INFRARED SPECTROSCOPY OF THE $A^{2}\Pi_{**} X^{2}\Sigma^{+}_{g}$ (0,1) HOT BAND OF $C_{2}^{-}$ USING TUNABLE DIODE LASER SPECTROMETER
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Date
1987
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Ohio State University
Abstract
Following the high resolution IR spectroscopy of the (0,0) and (1,1) bands in the electronic transition $A^{2}\Pi_{**} X^{2}\Sigma^{+}_{g}$ of $C_{2}^{-}$ using a difference frequency spectrometer1, we studied the (0,1) band using a tunable diode laser spectromter. $C_{2}^{-}$ was generated in an ac discharge of $C_{2}H_{2}$ and He and was detected using velocity modulation technique. We observed and assigned 25 lines in the $4.7 \mu m$ region. These lines were included in the non-linear least squares fit with the (0,0) and (1,1) bands1. this improved the molecular constants of both electronic states. The following molecular constants have been obtained for the (0,1) band (in $cm^{-1}$:[FIGURE] Numbers in parentheses are $3\sigma$.
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$^{1}$ B.D. Rehfuss, D.-J. Liu, B.M. Dinelli, M.-F. Jagod, M.W. Crofton, and T. Oka, WG2
Author Institution: Department of Chemistry and Department of Astronomy and Astrophysics, The University of Chicago
Author Institution: Department of Chemistry and Department of Astronomy and Astrophysics, The University of Chicago