The diffusivity of 60Co was measured at 640 to 848K by means of the sputter sectioning of unidirectional diffusion profiles, and secondary ion mass spectrometry or γ-ray counting. It was found that the results could be described by:

D (cm2/s) = 4.3 x 10-1 exp[-2.22(eV)/kT]

R.Döhl, M.P.Macht, V.Naundorf: Physica Status Solidi A, 1984, 86[2], 603-12