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Abstract
The thermoluminescent (TL) properties of amorphous aluminium oxide thin films (thickness of the order of 0.3 μm) subjected to gamma (Co-60) irradiation are reported. Aluminium oxide thin films were prepared by laser ablation from an Al2O3 target using a Nd:YAG laser with emission at the fundamental line. The films were exposed to gamma radiation (Co-60) in order to study their TL response. Thermoluminescence glow curves exhibited two peaks, one at 110 °C and another at 176 °C. The high temperature peak shows a reasonable stability and ∼30% fading in the first five days after irradiation. A linear relationship between the absorbed dose and the thermoluminescent response for doses from 150 mGy to 100 Gy was observed. These results suggest that aluminium oxide thin films are suitable for detection and monitoring of gamma radiation.
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