A study has been made of the remanent effects of nuclear radiation on charge transport in additive-free low-density polyethene (LDPE) at 323 K. It was found that irradiation increased the conductivity of LDPE, with pure gamma radiation having a greater effect for a given absorbed dose than the mixed radiation of a thermal nuclear reactor. This increase in conductivity may be ascribed to an increase in trap density based on a trap-hopping conduction model. The measured current density also appears to be a function of Fn/n + 1, where F is the applied field and n a positive number.
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Banford et al. (1987) studied this question.
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