Journal ArticleDOI
The effect of intrinsic defects on RE3Al5O12 garnet scintillator performance
TLDR
In this article, the intrinsic defect structure of RE 3 Al 5 O 12 garnets (where RE ranges from Lu to Gd and Y) is predicted to be the lowest energy intrinsic defect.Abstract:
In order to enhance capabilities for the reliable detection of nuclear material, improved detector materials are required. There is considerable room for improvement within the scintillator family of materials. However, native defects are present in all materials and impurities are similarly common. In scintillators, these defects serve as trap sites for electrons or holes, and therefore may contribute to decreased and delayed light yield. In fact, Lempicki and Bartram [J. Lumin. 81 (1999) 13] have proposed that understanding defect related phenomena is vital to the improvement of scintillators. It follows that if the most egregious electron/hole trapping defects are removed from the system, light output should increase. However, defect removal is difficult to achieve since often the defect-type to be removed is not known. In this paper, we assist the optimization of scintillators by employing atomic scale simulation techniques to predict the intrinsic defect structure of RE 3 Al 5 O 12 garnets (where RE ranges from Lu to Gd and Y). Specifically, we predict cation antisite defects to be the lowest energy intrinsic defect. Furthermore, we describe how our results can be used to interpret experimental observations.read more
Citations
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Journal ArticleDOI
Recent R&D Trends in Inorganic Single-Crystal Scintillator Materials for Radiation Detection
Martin Nikl,Akira Yoshikawa +1 more
TL;DR: The major achievements and research and development trends from the last decade in the field of single crystal scintillator materials are described in this paper, where two material families are included, namely, those of halide and oxide compounds.
Journal ArticleDOI
Development of LuAG-based scintillator crystals – A review
Martin Nikl,Akira Yoshikawa,Kei Kamada,Karel Nejezchleb,Christopher R. Stanek,J.A. Mares,Karel Blazek +6 more
TL;DR: A review of research and development of Lu3Al5O12 (LuAG)-based single crystal scintillators is presented in this paper, where several different activators, namely Ce3+, Pr3+, Yb3+ and Sc3+ have been reported in the literature and such doped LuAG single crystals have been extensively studied to understand a number of issues.
Journal ArticleDOI
Complex oxide scintillators: Material defects and scintillation performance
TL;DR: An overview of recognized structural defects, impurities and related trapping levels and their role in the scintillation mechanism is provided and discussed in single crystal materials belonging to tungstate, Ce- or Pr-doped aluminum perovskite, garnet and finally to Ce doped silicate scintillators as discussed by the authors.
Journal ArticleDOI
Broadband Near-Infrared Garnet Phosphors with Near-Unity Internal Quantum Efficiency
Journal ArticleDOI
Unraveling the Mechanisms of Thermal Quenching of Luminescence in Ce3+-Doped Garnet Phosphors†
TL;DR: The environmental and economic benefits of phosphor-converted white-light-emitting diodes (pc-WLEDs) have been increasingly appreciated in recent years as discussed by the authors.
References
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Journal ArticleDOI
LASER OSCILLATIONS IN Nd‐DOPED YTTRIUM ALUMINUM, YTTRIUM GALLIUM AND GADOLINIUM GARNETS
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Properties of the YAG:Ce scintillator
TL;DR: In this paper, the light yield, light pulse shape due to γ-rays and α-particles, energy resolution and time resolution of the new YAG:Ce scintillator were studied using a light readout by means of the XP2020Q photomultiplier and the S3590-03 photodiode.
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Defects in yttrium aluminium perovskite and garnet crystals: atomistic study
TL;DR: In this paper, the effect of antisite point defects in yttrium aluminium perovskite (YAP) and garnet (YAG) was studied in the framework of the pairpotential approximation coupled with the shell model description of the lattice ions.
Journal ArticleDOI
LuAlO/sub 3/:Ce and other aluminate scintillators
TL;DR: LuAlO/sub 3/Ce as discussed by the authors is an extension of other well known cerium-doped scintillators, the yttrium-based orthoaluminate and garnet, and displays particularly promising performance.
Journal ArticleDOI
The antisite LuAl defect‐related trap in Lu3Al5O12:Ce single crystal
TL;DR: Nikl et al. as mentioned in this paper showed the structure of a Lu3Al5O12:Ce single crystal, a possible high performance scintillator material, whose scintillation performance is degraded by the occurrence of antisite defects.