An investigation was made of the Gorsky effect in the H-Ta system, at very low H contents (0.12 to 0.25at%), by performing measurements in the frequency range of 2.8 to 23Hz. The H diffusion coefficient was found to exhibit Arrhenius-type behavior at temperatures ranging from 210 to 525K:

D (cm2/s) = 3 x 10-4 exp[-0.15(eV)/kT]

A deviation from this behavior was observed at lower temperatures.

R.Cantelli, F.M.Mazzolai, M.Nuovo: Journal de Physique, 1971, 32[C2], 59-61