Three major themes of current work on the properties of point defects in diamond were reviewed. One was the attempt to introduce shallow donor centres, another was the clarification of the role played by transition metals, and the third was an improved quantitative understanding of irradiation effects. New, and literature, data on irradiation damage were considered in terms of measuring the concentrations of vacancy-related and self-interstitial centres, and the influence of isotope effects upon vacancy and interstitial centres. This topics included the identification of the self-interstitial 1.859eV line as a vibrational feature, the production rate of damage (including the effect of N impurities), and radiation-induced reactions. Problems arose from the current lack of information.

Current Problems in Diamond - Towards a Quantitative Understanding. G.Davies: Physica B, 1999, 273-274, 15-23