A calculation of the levels related to oxygen donors in Si and SiO2 has bee
n performed based on a helium-like model. These calculations agree well wit
h the experimental data while the energies of these levels are in the ratio
of about 2:1 and the effective radii of these levels are in the ratio of a
bout 2:1. (C) 2001 Elsevier Science Ltd. All rights reserved.