The Effects of Defect Doping on Low Temperature Neutron‐Irradiation Damage and Recovery in Aluminium and Platinum

By means of residual electrical resistivity measurements, low temperature neutron‐irradiation damage was investigated in Al and Pt which were doped with various defects. It was found that the damage rate of Al at 1.8 °K was almost unchanged by the addition of 0.5% Mg, and furthermore, that the presence of this impurity suppressed the damage rate enhancement normally caused by deformation of high purity Al. Similar results were obtained for IS Al, which contains 0.35% Fe + Si. These results indicate that the effect of channeling on the damage rate of Al is small. The damage rate of Pt was affected little by deformation, but was enhanced approximately 12% for samples containing ≈︁ 10 −4 quenched‐in vacancies. The stage I recovery of Pt was increased 30 to 50% by deformation or by quenched‐in vacancies. The results were compared with those of other investigations. It was concluded that most of the differences between heavy and light particle irradiations were caused by the greater importance of long‐range focused collision sequences in the former.