Luminescence of Tb3+-doped high silica glass under UV and X-ray excitation
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Author list: Chewpraditkul W., Shen Y., Chen D., Beitlerova A., Nikl M.
Publisher: Elsevier
Publication year: 2013
Journal: Optical Materials (0925-3467)
Volume number: 35
Issue number: 3
Start page: 426
End page: 430
Number of pages: 5
ISSN: 0925-3467
eISSN: 1873-1252
Languages: English-Great Britain (EN-GB)
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Abstract
Tb3+-doped silica glass was prepared as a luminescent material by impregnation of 0.1 M TbCl3 solution into a porous silica glass followed by high temperature sintering in a CO reducing atmosphere. Under the 225 nm UV and X-ray excitations the intense violet-blue Tb3+ luminescence from 5D3 level is observed, comparable in intensity to the green emission starting from the 5D4 level. Luminescence decay times of 1.18 and 2.18 ms are obtained, respectively, for the emission transitions starting from 5D3 and 5D4 levels. Relative concentration of Tb ions participating in cross-relaxation process is estimated. The integral scintillation efficiency obtained for this Tb3+-doped silica glass under X-ray excitation is of about 104% of that of the reference Bi 4Ge3O12 scintillation crystal. ฉ 2012 Elsevier B.V. All rights reserved.
Keywords
Luminescence decays, Porous silica glass, Tb3+
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