Deep impurity levels and Ti solubilities were determined by means of deep-level transient spectroscopy. The data indicated that the diffusivity could be described by:

D (cm2/s) = 1.2 x 10-1 exp[-2.05(eV)/kT]

S.Kuge, H.Nakashima: Japanese Journal of Applied Physics, 1991, 30[11A], 2659-63