Trends in Search for Bright Mixed Scintillators

Sidletskiy, O.

doi:10.1002/pssa.201701034

Cited by 22 publications

(11 citation statements)

References 69 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The lattice spacing of 0.336 nm corresponding to the (111) facet is between those of KYF 4 (0.330 nm) and KGdF 4 (0.340 nm). According to Vegard’s law, viz., the lattice constant, D , of solid solutions varies linearly with x : D (KY 1– x Gd x F 4 ) = (1 – x ) × D (KYF 4 ) + x × D (KGdF 4 ). The value of x was calculated to be 0.60, viz., ca.…”

Section: Resultsmentioning

confidence: 99%

Band Gap and Defect Engineering Enhanced Scintillation from Ce³⁺-Doped Nanoglass Containing Mixed-Type Fluoride Nanocrystals

Luo,

Jing,

Hua

et al. 2023

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Much can be learned from the research and development of scintillator crystals for improving the scintillation performance of glasses. Relying on the concept of "embedding crystalline order in glass", we have demonstrated that the scintillation properties of Ce 3+ -doped nanoglass composites (nano-GCs) can be optimized via the synergistic effects of Gd 3+ -sublattice sensitization and band-gap engineering. The nano-GCs host a large volume fraction of KY x Gd 1−x F 4 mixed-type fluoride nanocrystals (NCs) and still retain reasonably good transparency at Ce 3+ -emitting wavelengths. The light yield of 3455 ± 20 ph/MeV is found, which is the largest value ever reported in fluoride NC-embedded nano-GCs. A comprehensive study is given on the highly selective doping of Ce 3+ in the NCs and its positive effect on the scintillation properties. The favorable influence of the Y 3+ /Gd 3+ mixing on the suppression of defects is accounted for by density functional theory and borne out experimentally. As a proof-ofconcept, X-ray imaging with a good spatial resolution (7.9 lp/mm) is demonstrated by employing Ce 3+ -doped nano-GCs. The superior radiation hardness, repeatability, and thermal stability of the designed scintillators bode well for their long-term practical applications.

show abstract

Section: Resultsmentioning

confidence: 99%

Band Gap and Defect Engineering Enhanced Scintillation from Ce³⁺-Doped Nanoglass Containing Mixed-Type Fluoride Nanocrystals

Luo,

Jing,

Hua

et al. 2023

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…The significant predominance of the concentration of one of the cationic components, which generates the disorder, might lead to clustering in the compound, i.e., the appearance of regions of individual compounds with the same structural type [ 83 ], and the scintillation parameters of such materials are quite close to the parameters of initial components in a series of solid solutions.…”

Section: Next Step: Compositional Disordering Of the Materialsmentioning

confidence: 99%

Compositionally Disordered Crystalline Compounds for Next Generation of Radiation Detectors

et al. 2022

View full text Add to dashboard Cite

The review is devoted to the analysis of the compositional disordering potential of the crystal matrix of a scintillator to improve its scintillation parameters. Technological capabilities to complicate crystal matrices both in anionic and cationic sublattices of a variety of compounds are examined. The effects of the disorder at nano-level on the landscape at the bottom of the conduction band, which is adjacent to the band gap, have been discussed. The ways to control the composition of polycationic compounds when creating precursors, the role of disorder in the anionic sublattice in alkali halide compounds, a positive role of Gd based matrices on scintillation properties, and the control of the heterovalent state of the activator by creation of disorder in silicates have been considered as well. The benefits of introducing a 3D printing method, which is prospective for the engineering and production of scintillators at the nanoscale level, have been manifested.

show abstract

“…[ 17 , 18 , 19 ] Moreover, such mixed rare‐earth crystals can show improved scintillation efficiency and are the material of choice for the brightest scintillators. [ 20 , 21 ] This is partially related to the decrease of the thermalization length during the initiation of the ionizing track. [ 16 ] In the scintillating process, following the absorption of ionizing energy and creation of electron–hole pairs (conversion efficiency), the energy is transferred along an ionizing track to luminescent centers (transfer efficiency), at which point recombination occurs emitting a photon (quantum efficiency).…”

Section: Introductionmentioning

confidence: 99%

Structural and Optical Properties of High Entropy (La,Lu,Y,Gd,Ce)AlO₃ Perovskite Thin Films

Corey

Zhang

et al. 2022

Advanced Science

View full text Add to dashboard Cite

Mixtures of Ce-doped rare-earth aluminum perovskites are drawing a significant amount of attention as potential scintillating devices. However, the synthesis of complex perovskite systems leads to many challenges. Designing the A-site cations with an equiatomic ratio allows for the stabilization of a single-crystal phase driven by an entropic regime. This work describes the synthesis of a highly epitaxial thin film of configurationally disordered rare-earth aluminum perovskite oxide (La 0.2 Lu 0.2 Y 0.2 Gd 0.2 Ce 0.2 )AlO 3 and characterizes the structural and optical properties. The thin films exhibit three equivalent epitaxial domains having an orthorhombic structure resulting from monoclinic distortion of the perovskite cubic cell. An excitation of 286.5 nm from Gd 3+ and energy transfer to Ce 3+ with 405 nm emission are observed, which represents the potential for high-energy conversion. These experimental results also offer the pathway to tunable optical properties of high-entropy rare-earth epitaxial perovskite films for a range of applications.

show abstract

Trends in Search for Bright Mixed Scintillators

Cited by 22 publications

References 69 publications

Band Gap and Defect Engineering Enhanced Scintillation from Ce³⁺-Doped Nanoglass Containing Mixed-Type Fluoride Nanocrystals

Band Gap and Defect Engineering Enhanced Scintillation from Ce³⁺-Doped Nanoglass Containing Mixed-Type Fluoride Nanocrystals

Compositionally Disordered Crystalline Compounds for Next Generation of Radiation Detectors

Structural and Optical Properties of High Entropy (La,Lu,Y,Gd,Ce)AlO₃ Perovskite Thin Films

Contact Info

Product

Resources

About

Trends in Search for Bright Mixed Scintillators

Cited by 22 publications

References 69 publications

Band Gap and Defect Engineering Enhanced Scintillation from Ce3+-Doped Nanoglass Containing Mixed-Type Fluoride Nanocrystals

Band Gap and Defect Engineering Enhanced Scintillation from Ce3+-Doped Nanoglass Containing Mixed-Type Fluoride Nanocrystals

Compositionally Disordered Crystalline Compounds for Next Generation of Radiation Detectors

Structural and Optical Properties of High Entropy (La,Lu,Y,Gd,Ce)AlO3 Perovskite Thin Films

Contact Info

Product

Resources

About

Band Gap and Defect Engineering Enhanced Scintillation from Ce³⁺-Doped Nanoglass Containing Mixed-Type Fluoride Nanocrystals

Band Gap and Defect Engineering Enhanced Scintillation from Ce³⁺-Doped Nanoglass Containing Mixed-Type Fluoride Nanocrystals

Structural and Optical Properties of High Entropy (La,Lu,Y,Gd,Ce)AlO₃ Perovskite Thin Films