OPTOGALVANIC SPECTROSCOPY IN HOLLOW CATHODE DISCHARGES WITH PULSED AND CW DYE $LASERS^{\ast}$
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Date
1982
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Publisher
Ohio State University
Abstract
Electronic spectra of $\Pi_{2} (i^{3}\Pi_{u} - C^{3}\Pi_{g}), N_{2} (B^{3}\Pi_{g} - A^{3}\Sigma_{u}), CO (d^{3}\land_{1} - a^{3}\Pi_r), CN (\land^{2}\Pi - X^{2}\Sigma^{-})$ and atomic ion spectra of $He^{+}$ and $Ar^{+}$ have been studied in a recombination-limited hollow cathode discharge with a pulsed dye laser system over the range 490-690 nm. The time dependences of the optogalvanic signals indicate a different mechanism for the OGE in the case of ions. Extensive electronic spectra of $NH_{2}$ have been observed at higher resolution in the range 590-640 nm with a ew ring dye laser. Additional molecular spectra observed in this region in both pure $H_{2}$ discharges and in mixtures of $H_{2}$ and $N_{2}$ have not yet been identified.
Description
$^{\ast}Supported$ by NSF Grant #GHE-8007042