Abstract
IT is known that the discharge current in halogen-filled tubes is decreased by external illumination when the voltage applied to the tube exceeds its starting potential1,2. As a result of extensive investigations, it has become known that this photo-reduction of the discharge current i, referred to as the negative Joshi effect, −Δi, is associated with the electrode regions and has connexion with the electron affinity of the gases, that its behaviour is markedly increased by ageing, that is, continued discharge, and that it is not selective in the wave-length of available radiation3,4.
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References
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VENUGOPALAN, M. Influence of Illumination on the Starting Potential of an Ozonizer Discharge. Nature 206, 286–287 (1965). https://doi.org/10.1038/206286a0
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DOI: https://doi.org/10.1038/206286a0
