| Ca3Al2M3O12（M=Si,Ge）石榴石中Ce^3＋离子的荧光光谱 |
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| 引用本文： | 袁剑辉,刘行仁.Ca3Al2M3O12（M=Si,Ge）石榴石中Ce^3＋离子的荧光光谱[J].光谱学与光谱分析,1998,18(1):11-14. |
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| 作者姓名： | 袁剑辉 刘行仁 |
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| 作者单位： | 中国科学院长春物理研究所 |
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| 基金项目： | 国家自然科学基金,中国科学院长春物理研究所激发态物理开放实验室资助 |
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| 摘 要： | 本文研究了Ｃａ３Ａｌ２Ｍ３Ｏ１２（Ｍ＝Ｓｉ，Ｇｅ）石榴石中Ｇｅ＾３＋离子的荧光光谱。在这两种石榴石中，Ｃｅ＾３＋的发射光谱均为Ｃｅ＾３＋的５ｄ→４ｆ能级跃迁发射宽谱带，但有很大差异。在锗酸盐中，Ｃｅ＾３＋的发射强度很弱，而在硅酸盐中发射强，２９５和７７Ｋ下在Ｃａ３Ａｌ２Ｓｉ３Ｏ１２中Ｃｅ＾３＋的荧光寿命分别为４６和４９ｎｓ。Ｇｄ＾３＋和助溶剂的引入可提高Ｃｅ＾３＋的发射强度。
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| 关 键 词： | 荧光光谱 石榴石 铈离子 三价铈 |
Spectroscopic characteristics of Ce3+ doped Ca3Al2M3O12 (M=Si, Ge) garnets] |
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| J Yuan,X Liu.Spectroscopic characteristics of Ce3+ doped Ca3Al2M3O12 (M=Si, Ge) garnets][J].Spectroscopy and Spectral Analysis,1998,18(1):11-14. |
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| Authors: | J Yuan X Liu |
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| Institution: | Changchun Institute of Physics, Academia Sinica, 130021 Changchun. |
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| Abstract: | The spectral properties of Ce3+ doped Ca3Al2M3O12 (M = Si, Ge) garnets have been reported under excitation of UV light. The emission spectra of Ce3+ ion in garnets consist of a broad band assingning to the 5d-4f transition of Ce3+ ion. The emission intensity Ce3+ ion in Ga3Al2Ce3O12 shows very weak, but in Ga3Al2SiO12 shows strong. The emission intensity of Ce3+ ion is greatly enhanced by adding Gd3+ or flux into Ca3Al2Si3O12: Ce garnet. At 295 and 77K, the fluorescence decay of Ce3+ ions in Ca3Al2Si3O12 garnet have been measured and the fluorescence lifetimes of Ce3+ ions are 46 and 49ns, respectively. |
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