Diffusion of tritium in single crystal Li2O

The release of tritium from neutron irradiated spherical samples of single crystal Li2O was measured by isothermal annealing experiments. The release is shown to be controlled by diffusion of tritium in the solid under appropriate experimental conditions. Deviations from solely diffusion controlled release were observed when traces of water were present in the He-purge gas used in the experiments. (orig./RW)