The migration of H in un-doped amorphous hydrogenated material was measured by using the elastic-recoil detection of variations in the dispersion parameter at temperatures of between 350 and 470C (table 170). It was found that the dispersion parameter increased with increasing annealing temperature.

X.M.Tang, J.Weber, Y.Baer, F.Finger: Physical Review B, 1990, 42[11], 7277-9