کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5398964 | 1505899 | 2015 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Temperature and host dependence of the transition interference between f-f and f-d transitions of Sm2+ in matlockites
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The absorption spectra of Sm2+ doped in MFX (M=Sr, Ba; X=Cl, Br) crystals were studied within the range of 20,000-35,000Â cmâ1 as a function of temperature and host. The absorption bands observed were described with a simple model developed by Wood and Kaiser using group theory. The temperature and host dependence on the 7F0â5D3 Fano resonance lines were investigated. BaFCl:Sm2+ system showed a “normal” 7F0â5D3 transition at 4Â K in spite of similar crystal structure and absorption profile with other MFX hosts. New Fano resonances were observed in the absorption spectra at higher energies (23,000-25,000Â cmâ1) for all MFX:Sm2+ systems at 4Â K which persist up to room temperature. Preliminary energy level calculation showed that these resonance lines involve the interaction between higher excited 5LJ states of 4f6 configuration and 4f55d1 configuration.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 161, May 2015, Pages 323-329
Journal: Journal of Luminescence - Volume 161, May 2015, Pages 323-329
نویسندگان
Prodipta Pal, Hans Hagemann, Hans Bill, Jiahua Zhang,