Direct and indirect nuclear methods were used to analyze H in various types of material, by exploiting the possibilities of 2-dimensional position-sensitive detectors. The distribution of H in, and on, diamond was measured in 3 dimensions by means of elastic-recoil detection analysis. This supplemented earlier resonant nuclear techniques. The indirect methods of muonium spin rotation and time-differential perturbed angular distribution measurements also provided a great deal of information. The H was implanted, and its diffusion was monitored as a function of temperature. No migration of the H was found at up to 1473K. This remarkable result was considered with regard to existing theoretical calculations. It was concluded that the implanted H was self-trapped.

A Study of the Mobility and Trapping of Minor Hydrogen Concentrations in Diamond in Three Dimensions. S.H.Connell, J.P.F.Sellschop, J.E.Butler, R.D.Maclear, B.P.Doyle, I.Z.Machi: Diamond and Related Materials, 1998, 7[11-12], 1714-8