A detailed study was made of the Mg-related donors which were introduced by fast neutron reactions and subsequent annealing. The energy spectrum of shallow Mg-related donors, following annealing at 700C, ranged from about Ec - 0.022eV to about Ec - 0.042eV. An increase in the annealing temperature led to the disappearance of the shallow donors and to the formation of other Mg-related donor centers.

V.V.Emtsev, D.S.Poloskin, E.I.Shek, N.A.Sobolev: Materials Science Forum, 1995, 196-201, 163-6