“…1 shows the UV emission spectra of YAG:Ce SC at 10 and 300 K (curves 1 and 2, respectively) at the excitation by SR with energies E ¼ 20 eV and 11.3 eV which exceed the energy gap of YAG E g ¼ 7:8 eV and correspond to the ''bottom'' and ''top'' of excitation spectra, respectively, in the region 8.0-25 eV of interband transition [22], in comparison with the analogous spectra for the SCF of this garnet (curves 3 and 4). The luminescence spectrum of the YAG:Ce SC at 10 K (curve 1) presents the superposition of the bands with l max ¼ 263 nm (4.71 eV) and 330 nm (3.87 eV) which are caused, correspondingly, by the emission of self-trapped excitons (STE) [21,23] and centers formed by the Y 3+ Al AD [18,[21][22]. In contrast to the SC, only the weak STE luminescence in the band with l max ¼ 260 nm (4.76 eV) occurs in the luminescence spectrum of the YAG:Ce SCF at 10 K (Fig.…”