Influence of dopants and preparation method on the thermoluminescence properties of corundum crystals |
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| Authors: | Jiř i Kvapil,Z. Vitamvá s,B. Perner,Jos. Kvapil,B. Má nek,O. Adametz,J. Kubelka |
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| Abstract: | Thermoluminescence (TL) of several types of corundum crystals is described. Undoped crystals showed a weak TL at 15 and 110°C with emission at 330 and 495 nm. Good TL response at 275°C is shown by Cr doped (0.03 wt%) crystals grown by Verneuil method in the oxygen cone of the flame annealed in hydrogen at 1500–1800°C. The most intensive TL response is shown by crystals doped with Ti and Mo (∼ 10−3wt.%) grown by Czochralski method in reducing conditions. The former may be used to the detection of γ-rays dose ≥ 10−3 − 10−2 Gy, the latter ≥ 10−7 − 10−6 Gy. |
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