The migration of 54Mn in pure Al was studied at 917 to 843K by using the serial sectioning technique. The results could be described by:

D (cm2/s) = 8.1 x 100 exp[-1.96(eV)/kT]

This value of the activation energy, which was adjusted for surface-barrier effects, was 0.29eV lower than the previously reported value.

D.L.Beke, I.Gödény, I.Moricz, F.J.Kedves: Philosophical Magazine Letters, 1989, 60[5], 219-24