Glow discharges neutral-species density

Fig. 11. Ranges of kinetic energies and densities of species typically present in glow discharge plasmas. A=secondary electrons accelerated through the sheath, B=ions backscattered from cathode (most likely neutralized), C=ions accelerated towards cathode, D=electrons in bulk plasma, E=hot ions and neutrals formed in dissociation reactions (Frank-Condon effect), F=ions in bulk plasma, and G=neutral atoms and molecules. After [39].

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