A new relaxation effect in gold-doped lead

Internal friction studies on gold-doped lead are reported which yield a relaxation time of τ = 10^-14.9exp 0.437 eV/kT. The defect producing the relaxation process appears to have 〈100〉 symmetry and a relatively large elastic-dipole strength. Since this activation energy is equal to that measured in diffusion it is suggested that the two processes are identical, presumably from a dumb-bell configuration.