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Preparation and luminescence properties of ZnO:Ga – polystyrene composite scintillator
/ Burešová, Hana (NUVIA, Czech Republic) ; Procházková, Lenka (Prague, Tech. U.) ; Turtos, Rosana Martinez (Milan Bicocca U.) ; Jarý, Vítězslav (Prague, Inst. Phys.) ; Mihóková, Eva (Prague, Inst. Phys.) ; Beitlerová, Alena (Prague, Inst. Phys.) ; Pjatkan, Radek (NUVIA, Czech Republic) ; Gundacker, Stefan (CERN) ; Auffray, Etiennette (CERN) ; Lecoq, Paul (CERN) et al.
Highly luminescent ZnO:Ga-polystyrene composite (ZnO:Ga-PS) with ultrafast subnanosecond decay was prepared by homogeneous embedding the ZnO:Ga scintillating powder into the scintillating organic matrix. The powder was prepared by photo-induced precipitation with subsequent calcination in air and Ar/H2 atmospheres. [...]
2016 - 10 p.
- Published in : Opt. Express 24 (2016) 15289
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Core–shell ZnO:Ga-SiO$_2$ nanocrystals: limiting particle agglomeration and increasing luminescence via surface defect passivation
/ Procházková, Lenka (Prague, Tech. U. ; Prague, Inst. Phys.) ; Vaněček, Vojtěch (CTU, Prague) ; Čuba, Václav (CTU, Prague) ; Pjatkan, Radek (Unlisted, CZ) ; Martinez-Turtos, Rosana (Milan Bicocca U.) ; Jakubec, Ivo (ASCR, Prague) ; Buryi, Maksym (Prague, Inst. Phys.) ; Omelkov, Sergey (Tartu U.) ; Auffray, Etiennette (CERN) ; Lecoq, Paul (CERN) et al.
Heat treatment is needed to increase the luminescence intensity of ZnO:Ga particles, but it comes at the cost of higher particle agglomeration. Higher agglomeration results in low transparency of scintillating powder when embedded in a matrix and constitutes one of the biggest disadvantages, besides low light yield and low stopping power, of ZnO:Ga powder. [...]
2019 - 7 p.
- Published in : RCS Advances 9 (2019) 28946-28952
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Timing performance of ZnO:Ga nanopowder composite scintillators
/ Turtos, Rosana M (Milan Bicocca U.) ; Gundacker, Stefan (CERN) ; Lucchini, Marco T (CERN) ; Procházková, Lenka (Prague, Tech. U.) ; Čuba, Václav (Prague, Tech. U.) ; Burešová, Hana ; Mrázek, Jan (ASCR, Prague) ; Nikl, Martin (Prague, Inst. Phys.) ; Lecoq, Paul (CERN) ; Auffray, Etiennette (CERN)
The implementation of nanocrystal-based composite scintilla-tors as a new generation of ultrafast particle detectors is ex-plored using ZnO:Ga nanopowder. Samples are characterized with a spectral-time resolved photon counting system and pulsed X-rays, followed by coincidence time resolution(CTR) measurements under 511 keV gamma excitation. [...]
2016 - 5 p.
- Published in : Phys. Status Solidi RRL 10 (2016) 843-847
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On the structure, synthesis, and characterization of ultrafast blue-emitting CsPbBr$_3$ nanoplatelets
/ Tomanová, Kateřina (Prague, Tech. U.) ; Čuba, Václav (Prague, Tech. U.) ; Brik, Mikhail G (Tartu U. ; Inst. Phys., Czestochowa ; Prague, Inst. Phys.) ; Mihóková, Eva (Prague, Inst. Phys.) ; Turtos, Rosana Martinez (CERN) ; Lecoq, Paul (CERN) ; Auffray, Etiennette (CERN) ; Nikl, Martin (Prague, Inst. Phys.)
Recent developments in medical imaging techniques, in particular, those in time-of-flight positron emission tomography put new challenges on scintillating material performance that cannot be fulfilled by conventional scintillators. Bright and ultrafast nanoparticles represent promising candidates to build up an advanced detection system needed. [...]
2019
- Published in : APL Materials 7 (2019) 011104
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Subpicosecond luminescence rise time in magnesium codoped GAGG:Ce scintillator
/ Tamulaitis, G (Vilnius U.) ; Vaitkevičius, A (Vilnius U.) ; Nargelas, S (Vilnius U.) ; Augulis, R (FTMC, Vilnius) ; Gulbinas, V (FTMC, Vilnius) ; Bohacek, P (Prague, Inst. Phys.) ; Nikl, M (Prague, Inst. Phys.) ; Borisevich, A (Minsk, Inst. Nucl. Problems) ; Fedorov, A (Minsk, Inst. Nucl. Problems) ; Korjik, M (Minsk, Inst. Nucl. Problems) et al.
The influence of co-doping of Gd$_{3}$Al$_{2}$GA$_{3}$O$_{12}$:Ce (GAGG:Ce) scintillator with magnesium on the rise time of luminescence response was studied in two GAGG:Ce crystals grown in nominally identical conditions except of Mg co-doping in one of them. Time-resolved photoluminescence spectroscopy and free carrier absorption techniques were exploited. [...]
10.1016/j.nima.2017.07.015.-
2017 - 5 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 870 (2017) 25-29
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Compositional engineering of multicomponent garnet scintillators: towards an ultra-accelerated scintillation response
/ Martinazzoli, Loris (CERN ; Milan Bicocca U. ; INFN, Milan Bicocca) ; Nargelas, Saulius (Vilnius, Inst. Theor. Phys. Astron.) ; Boháček, Pavel (Prague, Inst. Phys.) ; Calá, Roberto (CERN ; Milan Bicocca U. ; INFN, Milan Bicocca) ; Dušek, Michal (Prague, Inst. Phys.) ; Rohlíček, Jan (Prague, Inst. Phys.) ; Tamulaitis, Gintautas (Vilnius, Inst. Theor. Phys. Astron.) ; Auffray, Etiennette (CERN) ; Nikl, Martin (Prague, Inst. Phys.)
Optical, luminescence and scintillation characteristics were studied in garnet-type GAGG single-crystal scintillators grown by the Czochralski method and heavily doped with a cerium activator and a magnesium codopant at different concentrations. Emission quenching due to the formation of closely spaced Ce–Mg pairs accelerating the photoluminescence and scintillation decays down to a few nanoseconds and substantial suppression of slower decay components are observed. [...]
2022 - 11 p.
- Published in : Materials Advances 3 (2022) 6842-6852
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Timing performance of lead halide perovskite nanoscintillators embedded in a polystyrene matrix
/ Děcká, Kateřina (Prague, Tech. U. ; Prague, Inst. Phys.) ; Pagano, Fiammetta (CERN ; Milan Bicocca U.) ; Frank, Isabel (CERN ; LMU Munich (main)) ; Kratochwil, Nicolaus (CERN) ; Mihóková, Eva (Prague, Tech. U. ; Prague, Inst. Phys.) ; Auffray, Etiennette (CERN) ; Čuba, Václav (Prague, Tech. U.)
Nanomaterials like CsPbBr$_3$, benefiting from quantum confinement effects to feature ultra-fast decay time and tunable emission, are paving the way for the next generation of fast timing detectors. However, an ongoing challenge is to exploit their favorable properties in a full detector, given their size and instability. [...]
2022 - 8 p.
- Published in : J. Mater. Chem. 10 (2022) 12836-12843
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