Thermal He desorption spectrometry was used to determine vacancy annealing curves for monocrystalline Mo(110) which had been bombarded with 3keV He, 1keV He or 3keV H2 ions. The annealing curves were analyzed by using a simple diffusion model. This revealed that the migration energy was equal to 1.23eV. It appeared that H did not have any measurable effect upon the vacancy annealing curves. The dissociation energy of H which was bound to vacancies was deduced to be less than 1.4eV.

Vacancy Annealing in He and H2 Irradiated Mo Observed by Thermal Helium Desorption Spectrometry. T.R.Armstrong, H.A.Filius, A.Van Veen, J.R.Heringa: Journal of Nuclear Materials, 1993, 203[3], 189-95