Measurements were made of the concentrations and spatial distributions, of defects and their clusters, which resulted from low-energy bombardment of crystals. The method which was used to monitor the defect concentration as a function of depth involved optical transmission spectroscopy in conjunction with depth profiling techniques. Investigations which were carried out at -90C indicated that the observed spatial distribution of defects could be best explained by a long-range diffusion of hot holes.

N.Seifert, S.Vijayalakshmi, Q.Yan, J.L.Allen, A.V.Barnes, R.G.Albridge, N.H.Tolk: Physical Review B, 1995, 51[22], 16403-9