Optical Constants and Functions of Corundum Single Crystals in the   Vacuum Ultraviolat Region
  Optical 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). 
V.V. Harutunyan, T.S. Hakobyan, A.S.Hovhannesian, V.A. Gevorkyan, N.E.   Grigoryan, A.K.Avakyan, V.A.Grigoryan