| EuCl3.6H2O中Eu^3＋的^5D0—^7F0跃迁的“反常”温度效应及其跃迁机制研究 |
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| 引用本文： | 罗琦.EuCl3.6H2O中Eu^3＋的^5D0—^7F0跃迁的“反常”温度效应及其跃迁机制研究[J].光学学报,1997,17(11):503-1508. |
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| 作者姓名： | 罗琦 |
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| 作者单位： | 中山大学超快速激光光谱学国家重点实验室 |
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| 基金项目： | 国家科委攀登计划,国家教委博士点基金,国家教委跨世纪优秀人才基金 |
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| 摘 要： | 研究了ＥｕＣｌ３．６Ｈ２Ｏ的Ｅｕ＾３＋的＾５Ｄ０－＾６Ｆ０“禁戒”跃迁的机制有其“反常”温度效应。通过比较没温度下荧光光谱中＾５Ｄ０－＾６跃迁和＾５Ｄ０－＾７Ｆ０跃迁第一条谱线的强度比，发现由于晶格振动，＾７Ｆ２态通过四个频率为２４５ｃｍ－１的声子与＾７Ｆ０态耦合，使＾７Ｆ０态成为混合态，因而使＾５Ｄ０－＾７Ｆ－的跃迁成为可能，并且其振子强度随温度的变化而变化。
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| 关 键 词： | 稀土离子 激光光谱 温度效应 跃迁机制 |
Studies on "Abnormal" Temperature Effect and Transition Mechanism of 5D0-7F0 Transition of Eu3+ in EuCl3·6H2O |
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| Luo Qi,Li Runhua,Meng Jianxin Zhou Dajun,Zhou Jianying.Studies on "Abnormal" Temperature Effect and Transition Mechanism of 5D0-7F0 Transition of Eu3+ in EuCl3·6H2O[J].Acta Optica Sinica,1997,17(11):503-1508. |
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| Authors: | Luo Qi Li Runhua Meng Jianxin Zhou Dajun Zhou Jianying |
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| Abstract: | The transition mechanism and “abnormal” temperature effect of 5D 0 - 7F 0 transition of Eu 3+ in EuCl 3·6H 2O are studied. By analysing the intensity ratios of the 5D 0 - 7F 0 transition to the lowest energy level line of the 5D 0 - 7F 2 transition of fluorescence spectra at different tempertures, it is found that 7F 2 state (mainly the lowest energy level) can couple with 7F 0 state by four 245 cm -1 phonons. The 7F 0 state becomes a mixed state, so the “forbidden” 5D 0 - 7F 0 transition can be allowed and its oscillator strength varies with temperature. Therefore, the transition mechanism and the relationship between the oscillator strength of 5D 0 - 7F 0 transition in EuCl 3·6H 2O and temperature are well explained. |
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| Keywords: | laser spectra of rare earth ions temperature effect transition mechanism |
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