Fluorophosphate glasses doped with Eu3+ and Dy3+ for X-ray radiography

Pinto, Iago Carvalho; Galleani, Gustavo; Jacobsohn, L.G.; Ledemi, Yannick; Messaddeq, Younès; Camargo, Andréa Simone Stucchi de

doi:10.1016/j.jallcom.2020.158382

Cited by 12 publications

(3 citation statements)

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“…The integrated brightness of [Cs 6 Cl]NaGa 6 S 12 :Mn 2+ 0.01 and [Cs 6 Cl]NaGa 6 S 12 :Mn 2+ 0.13 , was estimated to be 22% and 9%, respectively, that of a commercial scintillator, bismuth germanium oxide (BGO). The higher Mn content resulted in a decrease in the material’s scintillation, presumably due to concentration quenching. ,, In the future, efficiency improvements can be explored by optimizing Mn concentration in [Cs 6 X ]NaGa 6 S 12 :Mn 2+ since a clear dependence on the Mn content was observed (Figure a). Sulfur-based materials, compared to oxides, are thought to have better attenuation length characteristics for scintillators due to the higher atomic number of S and, thus, a larger number of electrons, highlighting the potential to develop novel scintillating SIC materials. − …”

Section: Resultsmentioning

confidence: 99%

Tunable Salt-Inclusion Chalcogenides for Ion Exchange, Photoluminescence, and Scintillation

et al. 2023

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Salt-inclusion chalcogenides (SICs) consisting of covalent and ionic building blocks have emerged as functional materials exhibiting novel topologies that result from the combination of the chalcogenide-based frameworks and the salt inclusions contained within them. Nine compositions of a novel family of SICs [Cs6 X]AGa6 Q 12 (A = Na, K, and Rb; X = F, Cl, and Br; Q = S and Se) were synthesized via halide/polychalcogenide flux crystal growth and structurally characterized. Ex situ powder X-ray diffraction analysis was used to determine the optimal synthesis temperatures at which the titled SIC materials crystallized in the flux. Density functional theory calculations coupled with convex hull construction were performed to predict the stability of [Cs6 X]AGa6 Q 12 compositions as a function of X, A, and Q and to identify their decomposition pathways. A combination of single-crystal X-ray diffraction and energy-dispersive spectroscopy was used to study single-crystal-to-single-crystal (SC-SC) ion-exchange-reaction, a process that also allowed for the synthesis of two additional members of this family, [Cs6F]NaGa6S12 and [Cs6–x Rb x Br]RbGa6S12, which did not form during the direct flux crystal growth. Furthermore, single crystals of [Cs6 X]AGa6 Q 12:Mn2+ were obtained through direct flux crystal growth and SC-SC ion-exchange reactions and studied for their photoluminescent behavior using individual single crystals. The emission profile changed as a function of Mn2+-content, the A cation identity, and the synthesis method used. Finally, radioluminescence measurements were carried out on [Cs6Cl]NaGa6S12:Mn2+ bulk samples, resulting in bright orange scintillation.

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Section: Resultsmentioning

confidence: 99%

Tunable Salt-Inclusion Chalcogenides for Ion Exchange, Photoluminescence, and Scintillation

et al. 2023

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“…Its strongest emission peak locates at 612 nm ( 5 D 0 to 7 F 2 ), and matches well with the photoelectric detector. Currently, some works of glass scintillators with Eu 3+ doping have been reported [ 13 ]. Eu 3+ doped tellurite glass scintillators were reported by Huang et al [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

Photoluminescent and Scintillating Performance of Eu3+-Doped Boroaluminosilicate Glass Scintillators

Gong

Chen

et al. 2023

Materials

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In comparison with single crystal scintillators, glass scintillators are more promising materials for their benefits of easy preparation, low cost, controllable size, and large-scale manufacture. The emission of Eu3+ ion at 612 nm matches well with the photoelectric detector, making it suitable for the activator in glass scintillators. Therefore, the research on Eu3+ doped glass scintillators attract our attention. The photoluminescent and scintillating properties of Eu3+-activated boroaluminosilicate glass scintillators prepared by the conventional melt-quenching method were investigated in this work. The glass samples present good internal quantum yield. Under X-ray radiation, the optimal sample reveals high X-ray excited luminesce (XEL), and its integrated intensity of XEL is 22.7% of that of commercial crystal scintillator Bi4Ge3O12. Furthermore, the optimal specimen possesses a spatial resolution of 14 lp/mm in X-ray imaging. These results suggest that Eu3+-doped boroaluminosilicate glass is expected to be applied in X-ray imaging.

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“…A curva de decaimento correspondente à transição radiativa do Ce 3+ :5d→4f (350nm) foi ajustada por uma função exponencial simples. A diminuição do tempo de decaimento com a concentração está provavelmente associada à supressão da emissão por reabsorção ou migração não radiativa para íons vizinhos de Ce 3+ seguida de perdas não-radiativas para defeitos [148][149][150]. A Figura 22 apresenta os espectros de radioluminescência obtidos por excitação com raios X.…”

Section: Tempos De Vida Das Amostras Dopadas Com Ce 3+unclassified

Vidros dopados com íons terras raras para detectores de radiação de alta energia

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Fluorophosphate glasses doped with Eu3+ and Dy3+ for X-ray radiography

Cited by 12 publications

References 50 publications

Tunable Salt-Inclusion Chalcogenides for Ion Exchange, Photoluminescence, and Scintillation

Tunable Salt-Inclusion Chalcogenides for Ion Exchange, Photoluminescence, and Scintillation

Photoluminescent and Scintillating Performance of Eu3+-Doped Boroaluminosilicate Glass Scintillators

Vidros dopados com íons terras raras para detectores de radiação de alta energia

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