2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/28395Optical reflection spectra of corundum single crystals grown by HOC and Verneil methods are investigated before and after irradiated by electrons and neutrons using synchrotron radiation polarization (5-30eV).12 pages, LaTeX file, using RevTeX, 28 JPEG TAR and gzip compressed figures are includedCondensed Mattertext