Thermoluminescent response of single crystal Al2O3:Fe

✍ Scribed by A. Aypar

• Publisher: Elsevier Science
• Year: 1986
• Weight: 193 KB
• Volume: 37
• Category: Article
• ISSN: 0883-2889
• DOI: 10.1016/0883-2889(86)90246-7

✦ Synopsis

Thermoluminescence characteristics of iron doped aluminum oxide (AI203:Fe) single crystals were studied. The glow curve of x-and. y-ray irradiated A1203: 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 28Y'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~ls ~ respectively. Dose response was investigated between dose ranges of 5 × t02 mR and 1(14R for t37Cs y-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 ~37Cs y-rays. It is suggested that AlzO3:Fe may be used as a y radiation dosimeter in high dose environments such as oncology hospitals, radiobiological centers, nuclear reactors.