| Fluorescence of Sm~(2+) and Eu~(2+)→Sm~(2+) Energy Transfer in SrB_4O_7 |
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| 作者姓名： | 何志毅 郝志然 |
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| 作者单位： | Changchun Institute of Physics Academia Sinica，Changchun 130021，China，Changchun Institute of Physics，Academia Sinica，Changchun 130021，China |
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| 摘 要： | Fluorescence spectra of Sm~(2+)and Eu~(2+)→Sm~(2+)energy transfer were studied in SrB_4O_7.There appearsonly fluorescence from ~5D_0 transition of Sm~2+ at 77 K.The vibronic lines associated with ~5D_0→~7F_0 transitionwere observed.The thermal population to upper states of ~5D_1 and 4f~5d levels from ~5D_0 gives rise to ~5D_1→~7F_J and 5d→4f radiative transitions of Sin~(2+)at higher temperature.
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