Abstract
A PHOTO-DIMINUTION, Δi, of the discharge current i has been observed to be very pronounced chiefly in halogens2 ; this is attributed by Prof. Joshi3,4 to the ‘electron affinity’ of the (excited) gas. Joshi has argued that the effect should also occur in metallic vapours, the ‘electron affinity’ of which is enhanced by excitation under electrical discharge. This prediction, confirmed strikingly by Joshi's results on metallic and other vapours1,2,4, suggested the present investigation with mercury vapour.
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References
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PRASAD, B. Production of the Joshi Effect in Mercury Vapour. Nature 164, 69–70 (1949). https://doi.org/10.1038/164069a0
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DOI: https://doi.org/10.1038/164069a0
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