An investigation has been made of the effect of neutron irradiation on the following properties of a copper-activated zinc sulfide phosphor: luminescence efficiency under ultraviolet and x-ray excitation, infrared quenching of luminescence, temperature dependence of luminescence efficiency, thermoluminescence, rise time of luminescence, decay of luminescence, and dependence of the rise time of luminescence on the previous history of the sample. In addition, the analogous changes in the dielectric constant of the phosphor on illumination were measured for samples damaged to varying degree by neutrons. It was shown that neutron damage can be removed by annealing at high temperature.
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Smith et al. (1954) studied this question.
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