An atmospheric pressure supersonic nozzle beam source of atomic oxygen is described. Dissociation of molecular oxygen is accomplished by injection into a flow of helium and/or argon which has been heated in a commercial plasma torch. Dissociation efficiencies approaching unity are achieved with beam velocities in the range of 1.5–4.0 km s−1. Production of rare gas metastable and electronically excited oxygen species are minimized by the source design.
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Silver et al. (1982) studied this question.
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