Energy Dependence of the Stage-I Recovery of Aluminum

Abstract

Electron irradiations have been used to determine how the atomic recoil energy changes the stage-I recovery data on aluminum samples for the near-threshold energy region. Results indicate that the recovery spectrum of aluminum is quite similar to that of copper. It is assumed that both $I_C$ and ${\mathrm{I}}_{D+E}$ can be assigned to one crystallographic direction. These two recovery stages then have an energy dependence which is explained in terms of the changes of population for close pairs and distant pairs of Frenkel defects. A threshold energy is used to distinguish between ${\mathrm{I}}_C$ and ${\mathrm{I}}_{D+E}$ events. This new threshold energy is also useful for determining a characteristic energy interval that enables a comparison of aluminum with copper for existing experimental and theoretical values.