Radiation effects in Gd3(Al,Ga)5:O12:Ce3+ single crystals induced by swift heavy ions

Pankratova, Viktorija; Skuratov, V.A.; Бузанов, О. А.; Mololkin, A.A.; Козлова, А. П.; Kotlov, A.; Попов, А. И.; Pankratov, V.

doi:10.1016/j.omx.2022.100217

Cited by 2 publications

(2 citation statements)

References 37 publications

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“…PL spectra in the NIR range and excitation spectra of NIR luminescence of Yb 3+ ions in Ce 3+ -and Tb 3+ -activated samples are shown in Figure 4. Excitation spectra included bands predominantly due to intracenter transitions related to the Yb, Ce, Tb, and Gd ions and were not corrupted by defect centers and appropriate color centers as described in [46].…”

Section: Luminescence and Scintillation Propertiesmentioning

confidence: 99%

On the Quenching Mechanism of Ce, Tb Luminescence and Scintillation in Compositionally Disordered (Gd, Y, Yb)3Al2Ga3O12 Garnet Ceramics

et al. 2023

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Two series of (Gd, Y, Yb)3Al2Ga3O12 quintuple compounds with a garnet structure and solely doped with Ce and Tb were prepared in the form of ceramics by sintering in oxygen at 1600 °C for two hours and studied for the interaction of activator ions with ytterbium ions entering the matrix. It was shown that the photoluminescence and scintillation of Ce3+ ions are completely suppressed, predominantly by tunneling ionization through the charge transfer state (CTS) of the Ce4+-Yb2+ ions. The photoluminescence of Tb3+ ions is quenched in the presence of ytterbium, but not completely due to the poor resonance conditions of Tb3+ intraconfiguration transitions and the CTS of the single Yb3+ and the CTS of Ce4+-Yb2+ ions. The scintillation in the visible range of both Ce3+- and Tb3+-doped samples is intensely quenched as well, which indicates strong competition from Yb3+ ions to activators in interaction with the Gd substrate.

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Section: Luminescence and Scintillation Propertiesmentioning

confidence: 99%

On the Quenching Mechanism of Ce, Tb Luminescence and Scintillation in Compositionally Disordered (Gd, Y, Yb)3Al2Ga3O12 Garnet Ceramics

et al. 2023

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“…This may allow for improved transfer of energy between Gd 3+ ions and Ce 4+ ions. The move of the host lattice edge in the direction to higher energy in Mg 2+ and Li + codoped GAGG:Ce crystals comparing GAGG:Ce crystal shows that Li + and Mg 2+ codoping creates specific complex defects, which change the radial distribution on the atoms [3,18,19,20,21]. The Li + has a rather little impact on the creation of complex defect clusters in GAGG:Ce crystals, thus, changing the segregation forces for atom distributions.…”

Section: Introductionmentioning

confidence: 96%

Modification of Ce³⁺ luminescence in Li⁺ and Mg²⁺ codoped GAGG:Ce scintillators: A comparative study using synchrotron radiation

Bartosiewicz,

Kurosawa,

Yamaji

et al. 2024

J. Phys.: Conf. Ser.

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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.

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Radiation effects in Gd3(Al,Ga)5:O12:Ce3+ single crystals induced by swift heavy ions

Cited by 2 publications

References 37 publications

On the Quenching Mechanism of Ce, Tb Luminescence and Scintillation in Compositionally Disordered (Gd, Y, Yb)3Al2Ga3O12 Garnet Ceramics

On the Quenching Mechanism of Ce, Tb Luminescence and Scintillation in Compositionally Disordered (Gd, Y, Yb)3Al2Ga3O12 Garnet Ceramics

Modification of Ce³⁺ luminescence in Li⁺ and Mg²⁺ codoped GAGG:Ce scintillators: A comparative study using synchrotron radiation

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Radiation effects in Gd3(Al,Ga)5:O12:Ce3+ single crystals induced by swift heavy ions

Cited by 2 publications

References 37 publications

On the Quenching Mechanism of Ce, Tb Luminescence and Scintillation in Compositionally Disordered (Gd, Y, Yb)3Al2Ga3O12 Garnet Ceramics

On the Quenching Mechanism of Ce, Tb Luminescence and Scintillation in Compositionally Disordered (Gd, Y, Yb)3Al2Ga3O12 Garnet Ceramics

Modification of Ce3+ luminescence in Li+ and Mg2+ codoped GAGG:Ce scintillators: A comparative study using synchrotron radiation

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Modification of Ce³⁺ luminescence in Li⁺ and Mg²⁺ codoped GAGG:Ce scintillators: A comparative study using synchrotron radiation