A new luminescence band at 4.85eV was discovered in Li-doped crystals which had been subjected to mechanical deformation and irradiation. The luminescence was attributed to the radiative decay of electronic excitations which were localized near to interstitial ions, Lii+. The spectrum of Lii+ production by vacuum ultra-violet radiation at 4.2K was determined. The production mechanism of cationic Frenkel defects which accompanied the dissociation of excitons that were localized near to Li ions was considered.

M.W.Taiirov, E.A.Vasilchenko, Z.A.Zhumabekov: Fizika Tverdogo Tela, 1995, 37[8], 2319-26 (Physics of the Solid State, 1995, 37[8], 1268-72)