A5028694686- Radiation Detection and Scintillator Technologies
- Luminescence Properties of Advanced Materials
- Atomic and Subatomic Physics Research
- Nuclear Physics and Applications
- Terahertz technology and applications
- Nuclear materials and radiation effects
- Photonic Crystals and Applications
- Chemical Synthesis and Characterization
- Semiconductor Lasers and Optical Devices
- Photonic and Optical Devices
- Solid State Laser Technologies
- Photorefractive and Nonlinear Optics
- Environmental and Industrial Safety
- Medical Imaging Techniques and Applications
- Thermal and Kinetic Analysis
- Digital Radiography and Breast Imaging
- Near-Field Optical Microscopy
- Advanced X-ray and CT Imaging
- Particle Detector Development and Performance
- Advanced Energy Technologies and Civil Engineering Innovations
- Nanowire Synthesis and Applications
- Solid-state spectroscopy and crystallography
- Extraction and Separation Processes
- Coal and Coke Industries Research
Kurchatov Institute
2018-2025
This article provides an overview of the latest results in field improving properties multiatomic inorganic oxide compounds for scintillators. A possibility to control spatial distribution nonequilibrium carriers ionization track by creating a compositional disorder crystalline matrix is focus. Managing at nanoscale level creates opportunity efficient energy loss during thermalization, smaller dispersion, and, consequently, more binding into excitons further, increase scintillation yield....
A series of (Gd, Y, Yb, Tb, Ce)3Al2Ga3O12 compositionally disordered compounds with a garnet structure were prepared in the form ceramics by sintering oxygen at 1650 °C for 2 h and studied luminescent properties interaction ions entering matrix host. The luminescence features Ce3+ found to be strongly dependent on Yb concentration. Photoluminescence scintillation kinetics are characterized subnanosecond when index compound exceeds X = 0.3. It opens an opportunity create extremely fast dense...
Gadolinium-yttrium- aluminum-gallium garnets (GYAGG) doped and codoped with Eu, Tb, Ce were manufactured as ceramics to develop long-wavelength phosphors for high-brightness white light sources based on cathodoluminescence (CL). The CL yield (LY) of Tb-doped at high-intensity electron beam excitation is shown be more than twice high that the conventional phosphor YAG:Ce, whereas codoping Eu redshift chromaticity results in reducing LY approximately level YAG:Ce. might substantially improved...
Dense and transparent ceramic samples of a (Gd,Y)3Al2Ga3O12:Ce scintillator were obtained by using stereolithography-based Digital Light Processing (DLP) 3D printing for compacting, subsequent burnout, pressureless sintering. The effects stoichiometric deviations green body compaction methods (uniaxial pressing versus DLP printing) on the optical, luminescent, scintillation properties ceramics analyzed. An excess Y Gd in composition led to an increase transmittance acceleration kinetics....
A mechanism of firefly high‐scintillation light yield (LY) Tb‐doped quaternary (Gd, Y) 3 Al 2 Ga O 12 garnet ceramics is reported. Through measurements with the synchrotron source, high efficiency luminescence excitation, providing a quantum Q > 1 below photon multiplication energy range, defined. The excitation reaches two at slightly above E g . cascade photons explained by combining three factors: first, ≈ in lower mixed states 4f 7 5d spin (HS) and low (LS); second, cross‐relaxation (...
The nonuniformity of the photoluminescence properties in a single grain scale (Gd,Y)3Al2Ga3O12:Ce (GYAGG:Ce) ceramics was studied by scanning confocal microscopy and fluorescence lifetime imaging (FLIM). Oxide powders Gd1.5−xCexY1.5Al2Ga3O12 (x = 0.005, 0.015, 0.060) were fabricated co-precipitation thermally treated. Transparent samples obtained an oxygen atmosphere pressureless sintering. With increasing Ce concentration composition, intensity at boundaries decreases comparison with inner...
A method to create compositionally disordered compounds with a high number of cations in the matrices, that utilize cubic spatial symmetry garnet-type crystalline systems is demonstrated. Mixtures powdered materials solely doped Ce were used atomic compositions complexity. Several mixed systems, namely Gd3Al2Ga3O12/(Gd,Y)3Al2Ga3O12, Y3Al5O12/Gd3Al2Ga3O12, and Y3Al5O12/Y3Al2Ga3O12 annealed, compacted sintered air. The evaluated for structural, luminescence, scintillation properties. It was...
Two series of (Gd, Y, Yb)3Al2Ga3O12 quintuple compounds with a garnet structure and solely doped Ce Tb were prepared in the form ceramics by sintering oxygen at 1600 °C for two hours studied interaction activator ions ytterbium entering matrix. It was shown that photoluminescence scintillation Ce3+ are completely suppressed, predominantly tunneling ionization through charge transfer state (CTS) Ce4+-Yb2+ ions. The Tb3+ is quenched presence ytterbium, but not due to poor resonance conditions...
GYAGG:Tb (Ce) scintillators have been confirmed to be promising sources of light emission when excited by an intense 150 keV electron beam. The saturation the scintillation yield under such excitation conditions has studied. To explain results obtained, a model that considers Auger quenching mechanism was used. Ce-doped material did not show saturation, whereas moderate 30% drop measured in Tb-doped sample at highest beam intensity ~1 A/cm2. This put forward way exploit scintillator for...
Composite scintillation screens on a base of Gd1.2Y1.8Ga2.5Al2.5O12:Ce (GYAGG) scintillator have been evaluated for neutron detection. Besides the powdered scintillator, composite includes 6LiF particles; both are merged with binder and deposited onto light-reflecting aluminum substrate. Results obtained demonstrates that suitable use silicon photomultiplier readout to create prospective solution compact low-cost thermal sensor. GYAGG/6LiF screen shows pretty matched sensitivity γ-background...
In the present article, influence of activator concentration and impurity content raw materials on luminescence scintillation properties Li2CaSiO4 was studied. Polycrystalline powder material obtained by sol–gel method. It shown that europium had limited solubility in host lattice with a limiting proximate to 0.014 formula units. The maximum intensity photoluminescence observed divalent 0.002 units; light yield under alpha-particle excitation measured be 21,600 photons/MeV for ~200 μm...
The production of the scintillation ceramics can require utilization phosphorus compounds at certain stages 3D-printing, such as vat polymerization, applied for formation green bodies before sintering. effect additive on microstructure, optical, and parameters Gd1.494Y1.494 Ce0.012Al2Ga3O12 (GYAGG:Ce) obtained by pressureless sintering 1650 °C in an oxygen atmosphere was investigated first time. Phosphorus introduced form NH4H2PO4 into initial hydroxocarbonate precipitate a wide...
The technological aspects of the light inorganic crystalline compounds suitable to create scintillation materials detect charged particles and neutrons in a wide energy range have been examined. Among them, Li2CaSiO4:Eu was found be prospective candidate control valent state Rare Earth (RE) provide high intensity luminescence. It demonstrated that material has room for future improvement; however, this requires precise engineering its composition—an experimental search compositions or...
Flexible transparent electrodes, encompassing the combination of optical transparency and electrical conductivity, empower numerous optoelectronic applications. While main efforts nowadays concentrate on developing wire meshes conductive oxides, those technologies are still in a quest to find balance between price, performance, versatility. Here we propose new platform, advantages nanophotonic design roll-to-roll large-scale lithography fabrication tools, granting an ultimate optical,...
Abstract Flexible transparent electrodes, encompassing the combination of optical transparency and electrical conductivity, empower numerous optoelectronic applications. While main efforts nowadays concentrate on developing wire meshes conductive oxides, those technologies are still in a quest to find balance between price, performance, versatility. Here we propose new platform, advantages nanophotonic design roll‐to‐roll large‐scale lithography fabrication tools, granting an ultimate...
Phosphoric acid ester, a typical component of commercial dispersants, affects the functional properties Gd1.494Y1.494Ce0.012Al2Ga3O12 ceramics. In sintered ceramics, residual phosphorus can reach up to 40–70% introduced amount. The admixture located on surfaces particles activates grain growth during sintering and leads formation secondary phases rare-earth phosphates. With increasing concentration, density optical transmittance ceramics decrease. Relatively small amount improve luminescence...