Synthesis, structure, and scintillation of Ce-doped gadolinium oxyorthosilicate nanoparticles prepared by solution combustion synthesis

The synthesis of Ce-doped Gd oxyorthosilicate nanoparticles using the solution combustion synthesis (SCS) method was investigated as a function of the amount of SiO 2 in the precursor mixture. The SCS product consists of mixtures of Ce-doped Gd 2 SiO 5 , Gd 4.67 (SiO 4 ) 3 O, and Gd 2 O 3 , whose re...

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Bibliographic Details
Published in:Journal of applied physics 2011-10, Vol.110 (8), p.083515-083515-7
Main Authors: Jacobsohn, L. G., Tornga, S. C., Blair, M. W., Bennett, B. L., Muenchausen, R. E., Wang, R., Crozier, P. A., Cooke, D. W.
Format: Article
Language:English
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Summary:The synthesis of Ce-doped Gd oxyorthosilicate nanoparticles using the solution combustion synthesis (SCS) method was investigated as a function of the amount of SiO 2 in the precursor mixture. The SCS product consists of mixtures of Ce-doped Gd 2 SiO 5 , Gd 4.67 (SiO 4 ) 3 O, and Gd 2 O 3 , whose relative concentrations depend on the amount of SiO 2 in the precursor mixture; the synthesis of GSO:Ce was obtained with a reduction by 30% of the SiO 2 content. Accordingly, this is the brightest material produced, with a photoluminescence signal that is comparable to that obtained from the bulk sample. Thermoluminescence (TL) results showed a considerably lower concentration of trapping defects in the nanoparticles than in the bulk sample. A previous study [E. G. Yukihara, L. G. Jacobsohn, M. W. Blair, B. L. Bennett, S. C. Tornga, and R. E. Muenchausen, J. Lumin. 130 , 2309-2316 (2010)] reporting a comparison between photoluminescence and scintillation measurements, coupled to the TL characterization, suggests that surfaces play a major role in decreasing the scintillation efficiency of the nanoparticles. These results show that it is possible to prepare relatively bright scintillator powders using the SCS method.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.3647304