The diffusivity of D in monocrystals was deduced from measurements of changes in OD- infra-red absorption bands which occurred when samples were heated in flowing D2O vapor. It was found that, at 950K, the diffusion coefficient was 1.7 x 10-8cm2/s for diffusion along the c-axis. The activation energy was 1.5eV. Electric field-enhanced D diffusion was also demonstrated. Finally, proton-replacement and electron-nuclear double resonance experiments showed that a structure which had previously been reported to exist in the electron paramagnetic resonance spectrum of a radiation-induced center in this material was not due to a hyperfine interaction with protons.

R.Gonzalez, R.Hantehzadeh, C.Y.Chen, L.E.Halliburton, Y.Chen: Physical Review B, 1989, 39[2], 1302-6