Optical Properties and Radiation Stability of Al2O3 Microparticles, Nanoparticles and Microspheres

Abstract — A comparative analysis of the diffuse reflectance spectra in the range from 200 to 2500 nm is carried out on aluminum-oxide microspheres, microparticles and nanoparticles exposed to irradiation with protons and electrons with energies of 100 keV. It is established that the amount of intrinsic absorption centers in the microspheres is higher compared to microparticles and nanoparticles, while the concentration of induced absorption centers is lower.