The 18O isotope was used as the diffusing species, and its concentration distribution was subsequently explored using the 1.763MeV resonance in the 18O(p,α)15N reaction. The diffusivity at 1152C was 1.1 x 10-12cm2/s. The yield from the resonance furnished a measure of the 18O concentration, and the depth was explored by using various energies of the incident protons. Various methods of analysing the data were explored and the preferred one was that which made allowance for the various spreading factors which contributed to the observed α-particle spectrum. Measurements were quoted for the 18O self-diffusion coefficient in a TiO2 specimen; showing that they exhibited good reproducibility and were consistent with those of other observers.

Oxygen Diffusion Studies using Nuclear Reactions. Calvert, J.M., Derry, D.J., Lees, D.G.: Journal of Physics D, 1974, 7[7], 940

Table 7

Diffusion of O in TiO2-x at 1373K