“…Unfortunately, fast decay of many isotopes often leaves no time for postimplantation annealing in ion channeling experiments. The method has been successfully applied to Li, B, P, Ge, As, In, Cd, and Hf (Doyle et al 2000) ions implanted into natural and HPHT diamonds. Amazingly, high substitutional fractions, namely 70, 55, 54, and 34%, were observed for large (relative to carbon) As, P, Ge, and In atoms, respectively (Ronning and Hofsass 1999, Braunstein and Kalish 1981, Gorbatkin et al 1991, Correia et al 1997, but only ∼12% of implanted boron was found in substitutional sites (Ittermann et al 1997).…”