A short-time fading study of Al2O3:C

作者：Nascimento L F^*; Vanhavere F; Silva E H; De Deene Y

来源：Radiation Physics and Chemistry, 2015, 106: 26-32.

DOI：10.1016/j.radphyschem.2014.06.032

• Optically stimulated luminescence
• Al2O3:C
• Fading
• Dosimetry

This paper studies the short-time fading from Al2O3:C by measuring optically stimulated luminescence (OSL) signals (Total OSL: T-OSL, and Peak OSL: P-OSL) from droplets and Luxel (TM) pellets. The influence of various bleaching regimes (blue, green and white) and light power is compared. The fading effect is the decay of the OSL signal in the dark at room temperature. Al2O3:C detectors were submitted to various bleaching regimes, irradiated with a reference dose and read out after different time spans. Investigations were carried out using 2 mm size droplet detectors, made of thin Al2O3:C powder mixed with a photocured polymer. Tests were compared to Luxel (TM)-type detectors (Landauer Inc.). Short-time postirradiation fading is present in OSL results (T-OSL and P-OSL) droplets for time spans up to 200 s. The effect of short-time fading can be lowered/removed when treating the detectors with high-power and/or long time bleaching regimes; this result was observed in both T-OSL and P-OSL from droplets and Luxel (TM).

• 出版日期2015-1
• 单位河北医科大学