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

L. G. Jacobsohn, S. C. Tornga, M. W. Blair, B. L. Bennett, R. E. Muenchausen, R. Wang, Peter Crozier, D. W. Cooke

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Abstract

The synthesis of Ce-doped Gd oxyorthosilicate nanoparticles using the solution combustion synthesis (SCS) method was investigated as a function of the amount of SiO2 in the precursor mixture. The SCS product consists of mixtures of Ce-doped Gd2SiO5, Gd4.67(SiO 4)3O, and Gd2O3, whose relative concentrations depend on the amount of SiO2 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.

Original languageEnglish (US)
Article number083515
JournalJournal of Applied Physics
Volume110
Issue number8
DOIs
StatePublished - Oct 15 2011

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Jacobsohn, L. G., Tornga, S. C., Blair, M. W., Bennett, B. L., Muenchausen, R. E., Wang, R., Crozier, P., & Cooke, D. W. (2011). Synthesis, structure, and scintillation of Ce-doped gadolinium oxyorthosilicate nanoparticles prepared by solution combustion synthesis. Journal of Applied Physics, 110(8), [083515]. https://doi.org/10.1063/1.3647304