Abstract
Light emission is observed at room temperature from X-irradiated KC1, KBr and KI samples placed between insulated electrodes under high voltage excitation. The slow response of the effect to the electric field shows that metastable states are involved in the recombination process. The study of the brightness waves and the dependence of the light intensity on the temperature demonstrate that the excitation of the luminescence centers is obtained through a field assisted thermal ionization process.
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