The Use of Nuclear Reactions and Ion Channeling to Study Trapping of Cu Self-Interstitial Atoms by Be Solute Atoms in a Cu – 0.25 At.% Be Crystal

In a Cu – 0.25 at.% Be crystal, the 9Be(d,α)7Li and 9Be(d,p)10Be nuclear reaction yields were compared with backscattering yields of 0.6 MeV deuterons from Cu atoms at 30 K to study the irradiation-induced displacement of Be atoms from lattice sites. From an analysis of yields for [Formula: see text], [Formula: see text], and [Formula: see text] channels it was concluded that Be atoms were displaced approximately 0.13 nm in [Formula: see text] directions by the trapping of Cu self-interstitial atoms. Thus the trapping configuration was the [Formula: see text] mixed dumbbell. The Be atoms had returned to lattice sites by the end of stage III recovery (at 250 K).