Abstract
The change of electrical resistivity in magnetic field has been studied at 4.2 K in both copper and aluminum irradiated by fast neutrons at 5 K, together with the isochronal annealing behaviors and the effects of the irradiation-anneal cycles (cyclic irradiation). The increasing rate of the resistivity by the irradiation in aluminum is about three times as large as that in copper in zero magnetic field. The rates in the high purity copper with R 294k R 4,2k (RRR) of 1400 and aluminum with RRR of 1500 increase remarkably with an increase in applied magnetic field to the low irradiation doses, while those in the impure copper with RRR of 280 and 300 are independent of magnetic field. The radiation-induced resistivity in copper cannot be recovered even by annealing at 300 K. and the retained resistivity decreases in the cold-worked samples. The retained resistivity is accumulated by the cyclic irradiation. The radiation-induced resistivity of aluminum is completely annihilated by the annealing at 300 K.
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