Gamma-irradiation effects on Ce-doped YAG crystals grown by Cz and TGT method

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• 作者：Jun Xu ; Yongjun Dong ; Guoqing Zhou ; Guangjun Zhao ; Fenglian Su ; Liangbi Su ; Hongjun Li ; JiLiang Si
• 关键词：Radiation ; Gamma-ray ; Optical spectroscopy ; Thermally stimulated luminescence
• 刊名：Optical Materials
• 出版年：2007
• 期刊代码：81_09253467
• 类别：ch
• 出版时间：October 2007
• 卷：30
• 期：2
• 页码：234-237
• 文件大小：475 K

摘要

Gamma-rays radiation effects on Ce:YAG crystals grown by Czochralski (Cz) and temperature gradient techniques (TGT) have been studied by means of optical absorption and luminescence spectra. Valence of Ce³⁺ ion changes during the gamma-ray irradiation process and this result indicates Ce⁴⁺ ion may exist in both Cz-Ce:YAG and TGT-Ce:YAG crystals. Thermally stimulated luminescence measurements reveal intense thermoluminescence peaks in gamma-irradiated Ce:YAG crystals and trap parameters were calculated by general-order kinetics expression.