The Effect of Electric Fields on Scintillations in Crystalline Zinc Sulphide†

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Abstract
The effects of both static and alternating electric fields on scintillations produced by alpha particles in zinc sulphide have been examined. The results indicate that in electroluminescent crystals the brightness is reduced when the alpha particles are incident on the negative electrode. A change of barrier thickness with frequency was estimated from the results. The variation is interpreted as a change in dielectric constant with frequency. The results aeo in good agreement with earlier work and are supported by observations of the electroluminescence threshold voltage.