CHANNELING MEASUREMENTS OF THE TRAPPING EFFICIENCIES OF SOLUTE ATOMS FOR SELF-INTERSTITIAL ATOMS IN METALS

Channeling techniques were used to measure the concentration of mixed dumbbells as a function of irradiation fluence in crystals of Al-0. 10 at. % Ag, Cu-0. 25 at. % Be and Mg-0. 18 at. % Ag. From the experimentally observed production rates of mixed dumbbells from alpha or deuteron irradiations at temperatures where self-interstitials were mobile, it was concluded that the dominant trapping configuration was the mixed dumbbell. In the case of the Al-0. 10 at. % Ag alloy, mixed dumbbell trapping dominated at irradiation temperatures of both 70 and 150 K. The ratio of trapping efficiency e//v of vacancies for interstitials to the trapping efficiency e//d of solute atoms for interstitials was e//v/e//d equals 5 plus or minus 2 in all cases.