It was shown that a decrease in the efficiency of radiation-defect formation occurred upon doping with Ge. This was explained by supposing that the atoms of Ge were centers of annihilation for primary radiation defects.

L.I.Khirunenko, V.I.Shakhovtsov, V.V.Shumov, V.I.Yashnik: Materials Science Forum, 1995, 196-201, 1381-4