The charge-generation energy for commerical selenium xeroradiographic plates has been measured. A new technique based on x-ray-induced photocurrents was used as well as conventional xeroradiographic discharge measurements. Using x-ray spectra typical of medical x-ray irradiations at a conventional applied field of 10 V/μm, a charge-generation energy of 30–40 eV per pair was determined. Theoretical estimates related to the band gap predict a pair-creation energy of 7 eV per pair for selenium.
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John L. Donovan (1979) studied this question.
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