Electrical resistivity recovery spectra were measured between 77 and 200 K on Fe and Fe dilute alloys (Fe-Mo, Fe-Cr, Fe-Si, Fe-P, Fe-Be) irradiated with 2.5 MeV electrons at 77 K in order to study the interaction of substitutional solutes with self-interstitials. Oversized Mo and undersized Si solutes annihilated the recovery stage I_E in pure Fe, whereas slightly oversized Cr, and undersized P and Be solutes yielded new recovery stages below I_E, the positions of which stages shifted toward lower temperatures with increasing solute concentration. These stages are most likely ascribed to the migration and annihilation of mixed-dumbbells formed for the most part in stage I_D. The characteristics of these recovery spectra have not been observed in FCC alloys, which leads to the indication that the mixed-dumbbell in these alloys has a higher mobility than the self-interstitial.
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