Article ID Journal Published Year Pages File Type
1692113 Optical Materials 2016 5 Pages PDF
Abstract

•Scintillation process in BYF:Ce and BYF:Nd is revisited.•Energy transfer was studied via radioluminescence as a function of temperature.•Thermoluminescence was investigated by the Tm–Tstop method.

Radioluminescence spectra at temperatures ranging from 10 to 320 K and low temperature thermoluminescence glow curves of BaY2F8:Ce and BaY2F8:Nd scintillator crystals have been investigated. In both materials the intensities of the excitonic and the activator ion’s emission at X-ray excitation vary with temperature, anticorrelating with each other, which provides valuable information on the host-to-ion energy transfer. Detailed thermoluminescence studies, in turn, prove the existence of charge traps, which introduce quasi-continuous distributions of energy levels into the bandgap.

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Physical Sciences and Engineering Materials Science Ceramics and Composites
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