کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5400130 | 1505915 | 2014 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Luminescence of the SrCl2:Pr crystals under high-energy excitation
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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 present research was carried out in order to elucidate the mechanisms of energy transfer from the crystal lattice to Pr3+ ions in SrCl2. The luminescence excitation and emission spectra as well as luminescence kinetics of the SrCl2:Pr single crystals containing 0.2Â mol% Pr were investigated at 300 and 10Â K using the vacuum ultraviolet (VUV) synchrotron radiation. The X-ray excited luminescence spectra of the SrCl2:Pr (CPr=0.2 and 0.5Â mol%) and SrCl2:Pr, K (CPr=1.5Â mol%; CK=1.5Â mol%) crystals were studied at 294 and 80Â K. Under optical excitation of the samples in the Pr3+ absorption bands, there were observed five fast ultraviolet emissions assigned to the 4f15dâ4f2 transitions, and two long-wave bands corresponding to the f-f transitions. Furthermore, the intrinsic emission bands of SrCl2 were observed at 10Â K. The X-ray excited luminescence spectrum of the SrCl2:Pr crystal containing 0.2Â mol% Pr, besides intrinsic emission band near 400Â nm, has got a long-wave band at about 490Â nm of the Pr3+ centers. There were not observed any emission bands of the Pr3+ centers corresponding to the 4f15d-4f2 transitions in the X-ray excited luminescence spectrum of the SrCl2:Pr crystal. The possible mechanisms of energy transfer from the SrCl2 matrix to the Pr3+ centers are discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 145, January 2014, Pages 13-18
Journal: Journal of Luminescence - Volume 145, January 2014, Pages 13-18
نویسندگان
O.T. Antonyak, A.S. Voloshinovskii, V.V. Vistovskyy, G.B. Stryganyuk, O.P. Kregel,