- •No formation of others SiC polytypes.
- •The gamma rays irradiation has induced a slight surface amorphization.
- •A re-crystallization at lower and higher doses is noticed.
- •Larger doses induced a substantial internal stress.
- Damages and/or defects induced by γ-rays irradiation on 6H-SiC single crystals in channeled configuration towards 〈006〉/〈0012〉 crystallographic directions are reported in the range of 0–1200 kGy. Atomic force microscopy, X-rays diffraction, Raman and photoluminescence investigations were used to obtain a comprehensive set of informations on the nature and population distribution of the induced defects. Primarily, there was no carbon clusterization upon γ-rays irradiation and hence no formation of others SiC polytypes. In contrast, the γ-rays irradiation has induced an increase of the surface roughness at higher doses, which indicates a structural degradation. Larger doses induced an emergence of deeper shallow traps at energies greater than 350 meV below the bandgap.
- Keywords: SiC; γ-Rays; Defects; Nuclear materials; Radiations
- Source: Sciencedirect