By measuring gas release during isothermal and ramp heating, the diffusion of isolated He atoms could be determined at homologous temperatures greater than 0.6. The results could be described by:

D (cm2/s) = 1.3 x 100 exp[-1.35(eV)/kT]

V.Sciani, P.Jung: Radiation Effects, 1983, 78[1-4], 87-99

Table 26

Diffusion of Zn in Al