It was shown for the first time that, under pulsed (10-5s) ultrasound conditions, a considerable decrease in shallow mobile donor density was observed in monocrystals at 300 and 77K. This resulted in a change in the crystal photosensitivity and thermally stimulated current spectra. This effect was explained in terms of the gettering of donors by sinks in the bulk crystal. As the phenomenon occurred at low temperatures, and within 10-5s, it was assumed that the gettering process was athermal.

M.K.Sheinkman, L.V.Borkovskaya, B.R.Dzhymaev, I.A.Drozdova, N.E.Korsunskaya, I.V.Markevich, A.F.Singaevsky: Materials Science Forum, 1995, 196-201, 1467-70