Luminescence Characteristics of Ce3+- Doped Silica Glass under UV and X-ray Excitation

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Weerapong Chewpraditkul
King Mongkut’s University of Technology Thonburi (KMUTT), Bangmod, Thungkru, Bangkok 10140, Thailand
Somchai Panyainkaew
King Mongkut’s University of Technology Thonburi (KMUTT), Bangmod, Thungkru, Bangkok 10140, Thailand
Wandee Onreabroy
King Mongkut’s University of Technology Thonburi (KMUTT), Bangmod, Thungkru, Bangkok 10140, Thailand
Danping Chen
Shanghai Institute of Optics and Fine Mechanics (SIOM), CAS, Shanghai 201800, PR China
Martin Nikl
Institute of Physics (IOP), ASCR, Prague 16253, Czech Republic

Abstract

Ce3+- doped silica glass was prepared by impregnation of Ce ions into a porous silica glassfollowed by high temperature sintering in a CO reducing atmosphere. The characteristic emission of Ce3+5d → 4f transition peaking around 375 nm is observed in the luminescence spectra under UV and X-rayexcitation. The photoluminescence decay is governed by a few tens of nanoseconds decay time. The integralscintillation efficiency under X-ray irradiation is comparable to that of a Bi4Ge3O12 (BGO) crystal while thelight yield of about 16% of that of the BGO is obtained under γ-ray excitation.

Keywords : Ce3+ / Light yield / Luminescence / Luminescence decays / Silica glass / Scintillation

 

 

 

Article Details

Issue
Vol. 35 No. 3 (2012): July - September
Section
Original Articles
Author Biographies

Weerapong Chewpraditkul, King Mongkut’s University of Technology Thonburi (KMUTT), Bangmod, Thungkru, Bangkok 10140, Thailand

Associate Professor, Department of Physics, Faculty of Science.

Somchai Panyainkaew, King Mongkut’s University of Technology Thonburi (KMUTT), Bangmod, Thungkru, Bangkok 10140, Thailand

Lecturer, Department of Physics, Faculty of Science.

Wandee Onreabroy, King Mongkut’s University of Technology Thonburi (KMUTT), Bangmod, Thungkru, Bangkok 10140, Thailand

Assistant Professor, Department of Physics, Faculty of Science.

Danping Chen, Shanghai Institute of Optics and Fine Mechanics (SIOM), CAS, Shanghai 201800, PR China

Professor, Key Laboratory of Material Physics for High Power Lasers (Glass).

Martin Nikl, Institute of Physics (IOP), ASCR, Prague 16253, Czech Republic

Professor, Department of Optical Crystals.