Abstract
Thermoluminescence characteristics of iron doped aluminum oxide (Al 2O 3:Fe) single crystals were studied. The glow curve of x- and γ-ray irradiated Al 2O 3:Fe single crystals while being heated up to 375°C consisted essentially of an intense isolated single peak at 193°C and small peaks at 250° and 285°C. But the study was carried out on 193°C peak because of the accuracy of measurements and the possibility of using it a thermoluminescence dosimeter. The trap depth and escape frequency factor were calculated to be 1.156 eV and 3.1 × 10 11 s −1 respectively. Dose-response was investigated between dose ranges of 5 × 10 2 mR and 10 4R for 137Cs γ-rays. Dose-response was found to be linear in this range. The energy dependence was 5% between 33 and 662 keV when the thermoluminescent responses were normalized to 137Cs γ-rays. It is suggested that Al 2O 3:Fe may be used as a γ radiation dosimeter in high dose environments such as oncology hospitals, radiobiological centers, nuclear reactors.
Published Version
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Schedule a callMore From: International Journal of Radiation Applications & Instrumentation. Part A, Applied Radiation & Isotopes
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