Abstract
Phototransferred thermoluminescence of Al2O3:Cr induced by 470 nm blue light is reported. The glow curve corresponding to irradiation to 162 Gy and heating to 650 °C at 1 °C s−1 has at least seven peaks labelled I onwards. Of these, only peaks III-V stand out under phototransfer. The PTTL is discussed as systems of an acceptor and donors where the number of donors scales with preheating temperature. The PTTL time-response profiles are analysed using various models and the results are consistent with experimental patterns. We put particular attention on PTTL from deep electron traps whose dose response is sublinear but becomes linear if extensive illumination is used for the phototransfer. The intensity of the PTTL corresponding to deep electron traps goes through a maximum with illumination temperature. The initial increase is ascribed to thermal assistance and the subsequent decrease to thermal quenching.
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