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Luminescence spectra and their decay curves are measured for α-alumina irradiated by various ions and at various temperatures. The luminescence spectra show several bands in addition to the 3.8-eV band being well-known electron and photon irradiation. The decay curves and time-resolved spectra show enhanced decay of the 3.8-eV band and a new extremely fast decay component at about 400 nm which has...
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