Abstract
Radiation-induced conductivity (RIC) in polystyrene, poly(ethylene terephthalate), polyvinylcarbazole, and low-density polyethylene during long-term (to 3.6 × 103 s) irradiation with 50-keV electrons (dose rate of 6–830 Gy/s) was experimentally and theoretically studied. It was shown that the nonmonotonic RIC kinetics in the polymers is a direct consequence of the generation and the subsequent transport of charge carriers in them in the presence of traps distributed over a broad energy range almost according to the exponential law. This phenomenon has no relation to degradation and crosslinking processes that occur in irradiated polymers. The nonmonotonic RIC kinetics in polymers is a universal phenomenon, and it is described satisfactorily in terms of the Rose-Fowler-Vaisberg model.
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