It was found that a considerable number of vacancies formed during the glide motion of dislocations. The main cause of such formation was the dragging of jogs along screw dislocations. The resultant vacancies formed secondary defects such as stable vacancy clusters, di-vacancies and antisites. The generation of these defects was studied, by means of photoluminescence and positron lifetime spectroscopy, in samples which had been deformed at various temperatures.

H.S.Leipner, R.Krause-Rehberg, C.Hübner: Materials Science Forum, 1995, 196-201, 1267-72