Luminescence and scintillation of Eu2+-doped high silica glass
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Author list: Chewpraditkul W., Chen D., Yu B., Zhang Q., Shen Y., Nikl M., Kucerkova R., Beitlerova A., Wanarak C., Phunpueok A.
Publisher: Wiley
Publication year: 2011
Journal: physica status solidi - Rapid Research Letters (1862-6254)
Volume number: 5
Issue number: 1
Start page: 40
End page: 42
Number of pages: 3
ISSN: 1862-6254
eISSN: 1862-6270
Languages: English-Great Britain (EN-GB)
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Abstract
High silica glass doped with Eu2+ ions was prepared as a scintillating material by impregnation of Eu ions into a porous silica glass followed by reduction sintering in CO atmosphere. A dominant emission band of the Eu2+ 5d-4f transition peaking around 430 nm was observed in the luminescence spectrum with the excitation peak around 280 nm and no emission from Eu3+ was present. Photoluminescence decay kinetics was governed by decay times of a few microseconds. The Eu2+-doped high silica glass exhibited comparable energy resolution and slightly higher photoelectron yield with respect to the Bi4Ge3O12 crystal in the pulse height spectra for X-ray photon energies within 22-60 keV. Furthermore, a factor of 1.2 higher radioluminescence intensity was observed as well. (ฉ 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)This Letter reports the luminescence and scintillation characteristics of Eu2+-doped high silica glass. The impregnation of Eu ions into nanoporous high silica glass and sintering at 1150 ฐCfor 2 h in a CO reducing atmosphere produced the glass with an intense blue emission of Eu2+ ions under excitation with UV and X-rays. This glass showed high scintillation efficiency of about 120% of BGO scintillator. It appears to be slightly superior and comparable in terms of light output and energy resolution, respectively, for low energy spectrometry (<60 keV) of X- and gamma rays. ฉ 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Keywords
Eu2+, Glasses, Luminescence, Porous materials, Scintillation, time-resolved luminescence
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