It was recalled that the fraction of freely migrating defects during heavy-ion irradiation of this metal had been estimated from measurements of self-diffusion and from swelling-rate data. It was noted here that the 2 sets of data predicted appreciably different fractions. A new experimental approach to self-diffusion measurements was proposed here, and some initial results were reported which essentially avoided the previous discrepancy. The data also provided new information on the effective sink strength.

P.Fielitz, M.P.Macht, V.Naundorf, H.Wollenberger: Zeitschrift für Metallkunde, 1996, 87[6], 439-41