The research of the surface and the near-surface region of Cz-Si wafers irr
adiated with fast oxygen and neon ions of energy 4 MeV/u and dose 10(14) pa
rticles/cm(2) is presented. In our study several methods based on the Bragg
case of X-ray diffraction using Ag K-alpha 1, as well as reflection high-e
nergy electron diffraction and Nomarsky optical microscopy were used. It wa
s shown that implantation with fast neon ions causes larger disturbances of
silicon crystal structure than irradiation with oxygen ions.