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The role of post-irradiation oxidation on charge transport and trapping in low density polyethylene

We present TSC and TSD data recorded in the temperature range -80 to 100 /spl deg/C on LDPE samples subjected to an accelerated oxidation before and after exposure to X-irradiation. We show that, contrary to expectation, the oxidation of the samples following the radiation exposure causes a reversal of a TSD peak originally created by X-irradiation. Oxidation of the samples, but without X-irradiation, does not greatly affect the injection temperature but increases the injection level.