The xeroradiographic properties of selenium have been investigated using a typical medical x-ray spectrum. The influence of applied field was found to be very important in determining the surface potential discharge rate for both positively and negatively charged selenium. The x-ray energy absorbed per surface charge neutralized varied from 39 to 2.2 eV as the applied field increased from 104 to 2.4×105 V/cm. No effect of thickness on the discharge properties of evaporated selenium layers up to 530-μm thick was observed.
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John L. Donovan (1970) studied this question.
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