Abstract
ABSTRACT Spark discharges, in hydrogen, helium and He-H mixtures at atmospheric pressure, carrying 215 A rectangular wave current pulses or 3·5, 0·8 and 0·5 μsec durations, were studied with a photomultiplier technique. Using a photomultiplier-amplifier-CRO equipment in conjunction, with a spectrometer, the relative intensities, and their time variations, of some of the prominent lines in the visible spectra emitted from the sparks were observed. The possible mechanisms of light emission in spark afterglow were discussed, and some tentative estimations of excitation temperatures in the spark channels were made.
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