Abstract
The main thermoluminescence properties of amorphous aluminum oxide thin films prepared by pulsed laser deposition with thickness as low as 300 nm are presented. The obtained thin films were irradiated with UV (254 nm) and beta-particle radiation ( 90 Sr - 90 Y ). Thermoluminescence glow curves exhibited two peaks centered at 95°C and 162°C for UV irradiation. For beta-particle irradiation the thermoluminescence glow curve shows only the presence of the high temperature peak. The 162°C peak shows good stability and 10% fading in the first 4 days after irradiation. A linear relationship between absorbed dose and the thermoluminescence response up to 20 Gy was observed for beta-particle irradiation. The thermoluminescence parameters obtained showed a second-order kinetics and an activation energy of 1.2 eV for the 162°C peak. These properties make aluminum oxide thin films potentially attractive as an ultra-thin dosimeter for UV and beta-particle radiation.
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