Abstract
Pellets of nanocrystalline aluminum oxide synthesized by a combustion technique are irradiated with 120MeV Au9+ ions for fluence in the range 5×1011–1×1013ionscm−2. Two photoluminescence (PL) emissions, a prominent one with peak at ∼525nm and a shoulder at ∼465nm are observed in heat treated and Au9+ ion irradiated aluminum oxide. The 525nm emission is attributed to F22+-centers. The PL intensity at 525nm is found to increase with increase in ion fluence up to 1×1012ionscm−2 and decreases beyond this fluence. Thermoluminescence (TL) of heat-treated and swift heavy ion (SHI) irradiated aluminum oxide gives a strong and broad TL glow with peak at ∼610K along with a weak shoulder at 500K. The TL intensity is found to increase with Au9+ ion fluence up to 1×1013ionscm−2 and decreases beyond this fluence.
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