Synthesis, structure, and scintillation of Rb4Ta2Si8O23

Carone, Darren; Jacobsohn, L.G.; Breton, Logan S.; Loye, Hans-Conrad zur

doi:10.1016/j.solidstatesciences.2022.106861

Cited by 8 publications

(2 citation statements)

References 22 publications

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“…In recent years, Ta-based compounds have been investigated in a variety of fields, including phosphors [26], microwave dielectrics [27], and photo-catalysis [28]. Among them, Mg 4 Ta 2 O 9 has been attracting attention as a candidate material for scintillators, owing to its relatively large Z eff (64.3) and high density (6.20 g/cm 3 ) [29][30][31]. In our previous work, undoped Mg 4 (Ta,Nb) 2 O 9 single crystals were investigated, and they showed high LY and low afterglow levels comparable with commercial BGO crystal in the UV-Vis range [32].…”

Section: Introductionmentioning

confidence: 99%

Er-Doped Mg4Ta2O9 Single-Crystal Scintillators Emitting Near-Infrared Photons for High-Dose Field Monitoring

et al. 2023

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Mg4Ta2O9 single crystals doped with 0.01, 0.1, and 1% Er were grown using the floating zone method, and their photoluminescence and scintillation properties were studied. X-ray diffraction analysis confirmed that all samples had a hexagonal structure of Mg4Ta2O9. The samples showed that the emission peak at 1550 nm was due to 4f−4f transitions of Er3+ ions, with quantum yields of 32.9, 46.6, and 18.0% for 0.01, 0.1, and 1% doping concentrations, respectively. All samples showed scintillation with a broad emission band at 350 nm due to charge transfer from Ta5+ to O2− ions and emission peak at 1550 nm due to 4f−4f transition of Er3+ ions. The dose rate response functions showed that the detection limit for all samples was 0.06 Gy/h for scintillation detector applications.

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Section: Introductionmentioning

confidence: 99%

Er-Doped Mg4Ta2O9 Single-Crystal Scintillators Emitting Near-Infrared Photons for High-Dose Field Monitoring

et al. 2023

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“…Our research group has explored the synthesis of new oxide and oxyfluoride materials via several different synthetic routes, resulting in the discovery of new luminescent and scintillating materials. This has recently led to the discovery of a new self-activated luminescent silicate Rb 4 Ta 2 Si 8 O 23 that exhibits bright blue scintillation when exposed to X-rays [4]. These efforts were continued, targeting oxyfluoride type materials that are less abundant in the literature likely due to the relative ease with which oxides containing inherently luminescent ions can be prepared using traditional solid-state syntheses or hydrothermal methods.…”

Section: Introductionmentioning

confidence: 99%

Luminescence and Scintillation in the Niobium Doped Oxyfluoride Rb4Ge5O9F6:Nb

et al. 2022

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A new niobium-doped inorganic scintillating oxyfluoride, Rb4Ge5O9F6:Nb, was synthesized in single crystal form by high-temperature flux growth. The host structure, Rb4Ge5O9F6, crystallizes in the orthorhombic space group Pbcn with lattice parameters a = 6.98430(10) Å, b = 11.7265(2) Å, and c = 19.2732(3) Å, consisting of germanium oxyfluoride layers made up of Ge3O9 units connected by GeO3F3 octahedra. In its pure form, Rb4Ge5O9F6 shows neither luminescence nor scintillation but when doped with niobium, Rb4Ge5O9F6:Nb exhibits bright blue luminescence and scintillation. The isostructural doped structure, Rb4Ge5O9F6:Nb, crystallizes in the orthorhombic space group Pbcn with lattice parameters a = 6.9960(3) Å, b = 11.7464(6) Å, and c = 19.3341(9) Å. X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) measurements suggest that the niobium is located in an octahedral coordination environment. Optical measurements inform us that the niobium dopant acts as the activator. The synthesis, structure, and optical properties are reported, including radioluminescence (RL) measurements under X-ray irradiation.

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A novel V/S co-doped BiOBr catalyst for high-efficiency catalytic reduction of toxic organic and hexavalent chromium pollutants under dark

Mosisa,

Zhang,

et al. 2024

Journal of Environmental Chemical Engineering

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Synthesis, structure, and scintillation of Rb4Ta2Si8O23

Cited by 8 publications

References 22 publications

Er-Doped Mg4Ta2O9 Single-Crystal Scintillators Emitting Near-Infrared Photons for High-Dose Field Monitoring

Er-Doped Mg4Ta2O9 Single-Crystal Scintillators Emitting Near-Infrared Photons for High-Dose Field Monitoring

Luminescence and Scintillation in the Niobium Doped Oxyfluoride Rb4Ge5O9F6:Nb

A novel V/S co-doped BiOBr catalyst for high-efficiency catalytic reduction of toxic organic and hexavalent chromium pollutants under dark

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