Effects of gamma-irradiation on Al2O3 crystals grown under reducing atmosphere

Effects of gamma-irradiation on Al2O3 crystals grown under reducing atmosphere

Gamma-ray irradiation-induced color centers in Al2O3 crystals grown by temperature gradient techniques (TGT) under a strongly reducing atmosphere were studied. The transition F+- > F takes place during the irradiation process. Glow discharge mass spectroscopy (GDMS) and annealing treatments show...

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Veröffentlicht in:Materials letters 2007-05, Vol.61 (13), p.2606-2608
Hauptverfasser: Dong, Yongjun, Jun, Xu, Zhou, Guoqing, Su, Fenglian, Su, Liangbi, Li, Hongjun, Si, JiLiang, Qian, Xiaobo, Li, Xiaoqing, Shen, Jun
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Sprache:eng
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Zusammenfassung:Gamma-ray irradiation-induced color centers in Al2O3 crystals grown by temperature gradient techniques (TGT) under a strongly reducing atmosphere were studied. The transition F+- > F takes place during the irradiation process. Glow discharge mass spectroscopy (GDMS) and annealing treatments show that Fe3+ impurity ions are present in the crystals. A composite (F+-Fe3+) defect was presented to explain the origin of the 255nm band absorption in the TGT-Al2O3 crystals.
ISSN:0167-577X
DOI:10.1016/j.matlet.2006.10.016