Radioluminescence Sensitization in Scintillators and Phosphors: Trap Engineering and Modeling

The role of charge carrier trapping in determining radioluminescence (RL) efficiency increase during prolonged irradiation of scintillators has been studied by using YPO4:Ce,Nd as a model material. The Nd3+ ions act as efficient electron traps minimizing the role of intrinsic defects. Different Nd c...

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Bibliographic Details
Published inJournal of physical chemistry. C Vol. 118; no. 18; pp. 9670 - 9676
Main Authors Moretti, Federico, Patton, Gael, Belsky, Andrei, Fasoli, Mauro, Vedda, Anna, Trevisani, Mattia, Bettinelli, Marco, Dujardin, Christophe
Format Journal Article
LanguageEnglish
Published American Chemical Society 08.05.2014
Subjects
Chemical Sciences
Engineering Sciences
Physics
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Summary:The role of charge carrier trapping in determining radioluminescence (RL) efficiency increase during prolonged irradiation of scintillators has been studied by using YPO4:Ce,Nd as a model material. The Nd3+ ions act as efficient electron traps minimizing the role of intrinsic defects. Different Nd contents were considered in order to point out the correlation between the trap concentration and the detected RL efficiency dose dependence. RL measurements as a function of temperature clarified the role of the trap thermal stability in determining the shape and the magnitude of such effect. We propose also a model based on trap filling which is able to describe accurately the complex processes which are involved.
ISSN:1932-7447
1932-7455
DOI:10.1021/jp501717z