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Bartosiewicz, Karol, 2024, "Modification of Ce³⁺ luminescence in Li⁺ and Mg²⁺ codoped GAGG:Ce scintillators: A comparative study using synchrotron radiation", https://doi.org/10.18150/9HYLJU, RepOD, V1
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The luminescence characteristics of Gd3Al2Ga3O12:Ce3+ garnet scintillator crystals codoped with Li+ and Mg2+ ions were investigated. The excitation and emission spectra were obtained within the energy range of 3.6-21.6 eV, at both liquid helium and room temperature conditions to examine the effects of Li+ and Mg2+ codoping on cerium valence states, gadolinium-cerium energy transfer, and defect formation. Codoping with Mg2+ was found to efficiently convert Ce3+ to Ce4+, evidenced by significant changes in the shapes of the excitation spectra profile for Ce3+ luminescence in the exciton range, while Li+ had little impact. The presence of the high concentration of Ce4+ ions hampered the Gd3+→Ce4+ energy transfer. Redshifts in Ce3+ emission peaks indicated codopant-induced perturbations to the crystal field environment. The significant changes in the location of the Ce3+ excitation bands of Ce3+ luminescence in the exciton range further suggested alterations in the elemental distributions by the creation of complex defect clusters, particularly with Mg2+ codoping. The results demonstrate that Li+ and Mg2+ uniquely impact cerium valence, energy transfer processes, and structural properties in GAGG:Ce crystals
scyntylator, monokryształ, luminescencja, synchrotron
Bartosiewicz, K., S. Kurosawa, A. Yamaji, Y. Zorenko, i A. Yoshikawa. „Modification of Ce3+ luminescence in Li+ and Mg2+ codoped GAGG:Ce scintillators: A comparative study using synchrotron radiation”. Journal of Physics: Conference Series 2712, nr 1 (luty 2024): 012011. https://iopscience.iop.org/article/10.1088/1742-6596/2712/1/012011 doi: doi.org/10.1088/1742-6596/2712/1/012011
CC BY - Creative Commons Attribution 4.0
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