Composite scintillators based on the crystals and single crystalline films of LuAG garnet doped with Ce3+, Pr3+ and Sc3+ ions

Witkiewicz-Lukaszek, S.; Gorbenko, V.; Zorenko, T.; Paprocki, K.; Sidletski, O.; Gerasymov, Iaroslav; Mareš, J.; Kučerková, Romana; Nikl, M.; Zorenko, Yuriy

doi:10.1016/j.optmat.2018.07.066

Cited by 13 publications

(14 citation statements)

References 24 publications

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“…Furthermore, advanced composite scintillators [ 1 , 9 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 ] and thermoluminescent (TL) detectors [ 23 , 24 , 25 , 26 ] of “phoswich-type” (phosphor sandwich) may be fabricated by the LPE method for simultaneous registration of different components of ionizing radiation, namely, for content analysis of the mixed radiation fluxes involving ionizing particles with various penetration depths. These composite scintillators and detectors comprise epitaxial crystalline structures, including one/two SCFs for registration of low-penetrating α- and β-particles, and bulk single crystal (SC) substrates for registration of the high-penetrating radiation (X- or γ-rays) ( Figure 1 ).…”

Section: Introductionmentioning

confidence: 99%

“…The cubic structure of garnet implies fewer limitations on the film orientation. If considering just “simple” rare-earth garnets, the heaviest Lu 3 Al 5 O 12 (LuAG) host should be chosen as a substrate [ 13 , 14 , 15 , 16 , 17 , 18 , 40 , 41 , 42 , 43 , 44 ], while the film should comprise lighter Y 3 Al 5 O 12 (YAG)-based compositions [ 1 , 9 , 13 ]. The luminescence signals from LuAG and YAG can be distinguished by doping them with different activators having various luminescence lifetimes, such as Pr 3+ (15–25 ns), Ce 3+ (40–70 ns), or Sc 3+ (245–610 ns) in garnet hosts [ 15 , 16 , 40 , 41 , 42 , 43 , 44 ], or using the property of faster luminescence decay in films than that in bulk crystals with the same composition due to lower quantity of defects in the former.…”

Section: Introductionmentioning

confidence: 99%

“…It was shown [ 12 , 40 , 41 , 42 , 43 , 44 ] that the LY of Ce 3+ -, Pr 3+ -, and Sc 3+ -doped LuAG crystals and SCFs exceed those of YAG-based counterparts ( Table 1 ). This became an additional argument for the production of a new generation of high-performance composite scintillators based on LuAG crystals and films [ 15 , 16 , 17 , 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

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Composite Detectors Based on Single-Crystalline Films and Single Crystals of Garnet Compounds

et al. 2022

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This manuscript summarizes recent results on the development of composite luminescent materials based on the single-crystalline films and single crystals of simple and mixed garnet compounds obtained by the liquid-phase epitaxy growth method. Such composite materials can be applied as scintillating and thermoluminescent (TL) detectors for radiation monitoring of mixed ionization fluxes, as well as scintillation screens in the microimaging techniques. The film and crystal parts of composite detectors were fabricated from efficient scintillation/TL materials based on Ce3+-, Pr3+-, and Sc3+-doped Lu3Al5O12 garnets, as well as Ce3+-doped Gd3−xAxAl5−yGayO12 mixed garnets, where A = Lu or Tb; x = 0–1; y = 2–3 with significantly different scintillation decay or positions of the main peaks in their TL glow curves. This work also summarizes the results of optical study of films, crystals, and epitaxial structures of these garnet compounds using absorption, cathodoluminescence, and photoluminescence. The scintillation and TL properties of the developed materials under α- and β-particles and γ-quanta excitations were studied as well. The most efficient variants of the composite scintillation and TL detectors for monitoring of composition of mixed beams of ionizing radiation were selected based on the results of this complex study.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Composite Detectors Based on Single-Crystalline Films and Single Crystals of Garnet Compounds

et al. 2022

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“…Furthermore, the LuAG host is a very prospective material for the creation of composite scintillators as well. Recently, several types of epitaxial structures based on the Ce 3+ and Pr 3+ doped SCFs and Ce 3+ , Pr 3+ and Sc 3+ doped SC of LuAG garnets were successfully grown by using the LPE method, and the scintillation properties of respective composite scintillators were investigated [25][26][27]. Namely, we confirm in these works that the LuAG:Pr SCF/LuAG:Ce SC, LuAG:Sc SCF/LuAG:Ce SC and (Lu,Tb)AG:Ce SCF/LuAG:Pr SC epitaxial structures can be used for the detection of α-particles and γ-rays by means of the differences in the pulse height spectra and decay kinetics the SCF and SC parts of composite scintillators.…”

Section: Introductionmentioning

confidence: 99%

Development of Composite Scintillators Based on the LuAG: Pr Single Crystalline Films and LuAG:Sc Single Crystals

et al. 2021

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The scintillation properties of novel type of composite scintillator based on Lu3Al5O12:Pr (LuAG:Pr) single crystalline film (SCF) and LuAG:Sc substrate grown by the liquid-phase epitaxy method are considered in this work. The registration of α-particles and γ-quanta in such types of composites occurs by means of separation of the scintillation decay kinetics of SCF and crystal parts, respectively. Namely, under excitation by α-particles of 241Am (5.5 MeV) source and γ-quanta of 137Cs (662 keV) source, the large differences in the respective scintillation decay kinetics and decay time values tα and tγ are observed for the LuAG:Pr SCF/LuAG:Sc SC composite scintillator with various film thicknesses. Furthermore, the best tγ/tα ratio above 4.5 is achieved for such types of epitaxial structure with SCF and substrate thicknesses of 17 μm and about 0.5 mm, respectively. The development types of composite scintillators can be successfully applied for simultaneous registration of α-particles and γ-quanta in the mixed radiation fluxes.

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“…The basis for such novel engineering are the latest decisions in creating bulk single crystal (SC) and single crystalline film (SCF) scintillators [1,2] as well as the technologies of their production using the Czochralski method [3,4] and the liquid phase epitaxy (LPE) growth technique, respectively [5][6][7][8][9][10][11]. Namely, in our previous work, we have shown the possibility of simultaneous registration of α-particles and γ-quanta using the separation of the scintillation decay kinetics of the film (SCF) and crystal (SC) parts of composite scintillators, based on the epitaxial structures of different garnet compounds [12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

LPE Growth of Composite Thermoluminescent Detectors Based on the Lu3−xGdxAl5O12:Ce Single Crystalline Films and YAG:Ce Crystals

et al. 2020

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This work is dedicated to the development of new types of composite thermoluminescent (TL) detectors for simultaneous registration of the different components of ionization radiation based on the single crystalline films (SCFs) of Ce3+-doped Lu3−xGdxAl5O12:Ce (x = 0–1.5) garnet and Y3Al5O12:Ce (YAG:Ce) substrates using the liquid phase epitaxy (LPE) growth method. For this purpose, the TL properties of the mentioned epitaxial structures were examined in Risø TL/OSL-DA-20 reader under excitation by α- and β-particles from 242Am and 90Sr-90Y sources. We have shown that the cation engineering of SCF content can result in more significant separation of the TL glow curves of SCFs and substrates under α- and β-particle excitations in comparison with the prototype of such composite detectors based on the Lu3Al5O12:Ce (LuAG:Ce)/YAG:Ce epitaxial structure. Specifically, the difference between the TL glow curves of Lu1.5Gd1.5Al5O12:Ce SCFs and YAG:Ce substrates increases up to 120 K in comparison with a respective value of 80 degrees in the prototype based on the LuAG:Ce/YAG:Ce epitaxial structure. Therefore, the LPE-grown epitaxial structures containing Lu1.5Gd1.5Al5O12:Ce SCFs and Ce3+-doped YAG:Ce substrate can be successfully applied for simultaneous registration of α- and β-particles in mixed fluxes of ionization radiation.

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Composite scintillators based on the crystals and single crystalline films of LuAG garnet doped with Ce3+, Pr3+ and Sc3+ ions

Cited by 13 publications

References 24 publications

Composite Detectors Based on Single-Crystalline Films and Single Crystals of Garnet Compounds

Composite Detectors Based on Single-Crystalline Films and Single Crystals of Garnet Compounds

Development of Composite Scintillators Based on the LuAG: Pr Single Crystalline Films and LuAG:Sc Single Crystals

LPE Growth of Composite Thermoluminescent Detectors Based on the Lu3−xGdxAl5O12:Ce Single Crystalline Films and YAG:Ce Crystals

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