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Time-resolved measurements of the conductivity induced in foils of polyethyleneterephthalate by irradiation with x rays at exposure rates between 280 and 420 R/s and fields between 104 and 4.8×105 V/cm show the occurrence of a maximum of the induced current. This maximum is attributed to the combined effects of trap filling and recombination. The influence of polarization and space-charge effects was proved to be negligible. Current-time curves measured at different exposure rates and field strengths were explained satisfactorily by the rate theory of induced conduction.
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Filho et al. (1989) studied this question.
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