NEUTRAL AND IONIC EMISSION FROM COLLISIONALLY EXCITED ADDITIVES TO A HELIUM AFTERGLOW

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1976

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Ohio State University

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Spatially separated emissions from both ionic and neutral molecules have been observed when $N_{2}, CO, CO_{2}, N_{2}O$ and other gases were added to a flowing helium afterglow with opposite directions of flow. Emissions from neutral excited molecules are probably the result of ion-electron recombination in the plasma of the afterglow. It was observed that neutral molecular emission was decreased when a magnetic field was applied near the glow.

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$^{1}$ R. D. Levine et al, J. Chem. Phys. 64, 796 (1976). This work was supported, in part, by the National Science Foundation.
Author Institution: Department of Physics and Quantum Institute, University of California

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