The diffusion of 3He was measured by using atom-probe field-ion microscopy at 60 to 110K. The results could be described by:

D (cm2/s) = 5.4 x 10-3 exp[-0.28(eV)/kT]

J.Amano, D.N.Seidman: Journal of Applied Physics, 1984, 56[4], 983-92