Samples which contained various p-type and n-type dopants were implanted with spin-polarized 12B at temperatures of between 300 and 950K. By using -radiation detected nuclear magnetic resonance, the fraction of 12B in normal substitutional sites was determined. It was found that this fraction increased from about 20% at 300K to about 100% at a temperature which depended systematically upon the bulk doping. It was argued that the diffusive motion of interstitial B led to the presence of B in substitutional sites.

H.Metzner, G.Sulzer, W.Seelinger, B.Ittermann, H.P.Frank, B.Fischer, K.H.Ergezinger, R.Dippel, E.Diehl, H.J.Stöckmann, H.Ackermann: Physical Review B, 1990, 42[17], 11419-22