In a medium which contains a high density of traps for the diffusant, the penetration speed is controlled by the time that is required to fill the traps. The predictions of the limited flux model were verified for D transport in crystalline material that was highly doped with B. The results also implied that the maximum amount of mobile D in crystalline material was less than 1016/cm3; the detection limit of secondary ion mass spectroscopy.

X.W.Wu, B.Y.Tong: Philosophical Magazine Letters, 1990, 61[3], 147-52