The serial sectioning technique was used to study 124Sb tracer diffusivity in samples having dislocation densities of between 106 and 108/cm2. The results indicated that the pipe diffusivity could be described by:

D (cm2/s) = 6.0 x 10-3 exp[-2.9(eV)/kT]

P.Fahrenholtz, J.Mimkes: Physica Status Solidi B, 1976, 78[2], K137-40