A5063059305- Radiation Detection and Scintillator Technologies
- Luminescence Properties of Advanced Materials
- Atomic and Subatomic Physics Research
- Nuclear Physics and Applications
- Medical Imaging Techniques and Applications
- Nuclear materials and radiation effects
- Terahertz technology and applications
- Solid State Laser Technologies
- Inorganic Fluorides and Related Compounds
- Perovskite Materials and Applications
- Solid-state spectroscopy and crystallography
- Particle Detector Development and Performance
- Advanced Semiconductor Detectors and Materials
- Glass properties and applications
- Electronic and Structural Properties of Oxides
- ZnO doping and properties
- Ga2O3 and related materials
- Photorefractive and Nonlinear Optics
- Digital Radiography and Breast Imaging
- Acoustic Wave Resonator Technologies
- Optical properties and cooling technologies in crystalline materials
- Radioactive contamination and transfer
- Advanced NMR Techniques and Applications
- Refrigeration and Air Conditioning Technologies
- Thermodynamic and Exergetic Analyses of Power and Cooling Systems
Czech Academy of Sciences, Institute of Physics
2016-2025
Czech Academy of Sciences
2006-2025
Institute for Materials Research, Tohoku University
2011-2024
Tohoku University
2008-2016
Hatch (Canada)
2008-2014
University of Tartu
2014
Japan Research Institute
2009
Czech Technical University in Prague
2002-2004
The Ce-doped (LuyGd1–x)3(Gay,Al1–y)5O12 single crystals were grown by the micropulling down method. Their structure and chemical composition checked X-ray diffraction (XRD) electron probe microanalysis (EPMA) techniques. Optical, luminescent, scintillation characteristics measured methods of time-resolved luminescence spectroscopy, including light yield decay. Balanced Gd Ga admixture into Lu3Al5O12 provided an excellent scintillator where effect shallow traps was suppressed, spectrally...
Mg-codoped Lu3Al5O12:Ce single crystal scintillators were prepared by a micropulling down method in wide concentration range from 0 to 3000 ppm of Mg codopant. Their structure and chemical composition checked X-ray diffraction electron probe microanalysis techniques. Absorption luminescence spectra, photoluminescence decays, thermoluminescence glow curves measured together with several other scintillation characteristics, namely, the decay, light yield, afterglow, radiation damage reveal...
Abstract Absorption, radioluminescence and thermoluminescence spectra were measured for a set of Lu 3 Al 5 O 12 :Ce samples consisting bulk single crystal Liquid Phase Epitaxy‐grown films prepared from the same raw materials. The triple peak structure within 120–200 K distinguished in thermolu‐ minescence glow curves crystals was ascribed to an electron trap arising due antisite defect. depth associated with dominant at 142 evaluated using initial rise method. (© 2005 WILEY‐VCH Verlag GmbH...
Abstract Ce-doped (Y y Gd 1− ) 3 (Ga x Al 5 O 12 ( = 0, 1, 2, 3, 4 and 3) single crystals are grown by the micro-pulling down method. X-ray diffraction electron probe microanalysis techniques employed to check their structure chemical composition, respectively. Optical photoluminescence characteristics measured radioluminescence spectra, light yield scintillation decay measurements further made evaluate performance. We show that balanced Ga admixture in Y can considerably increase...
Thermally stimulated luminescence (TSL) glow curves and emission spectra were studied in undoped Ce-doped ${\mathrm{Lu}}_{3}{\mathrm{Al}}_{5}{\mathrm{O}}_{12}$ single crystals by wavelength resolved TSL measurements the $10--310\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ temperature range. Isothermal phosphorescence $10--100\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ range also performed, which point to existence of a tunneling-driven radiative recombination process. These processes can explain...
We present an investigation of defects acting as electron traps in ${\text{Lu}}_{2}{\text{SiO}}_{5}$ (LSO) and ${\text{Lu}}_{x}{\text{Y}}_{2\ensuremath{-}x}{\text{SiO}}_{5}$ (LYSO) performed by wavelength-resolved thermally stimulated luminescence (TSL) measurements from 20 to $400\text{ }\ifmmode^\circ\else\textdegree\fi{}\text{C}$ after room-temperature (RT) x-ray irradiation. Single crystals doped with several rare-earth ions such Ce, Tb, Tm, Sm were considered. A comparison between TSL...
We investigate and compare optical absorption, luminescence scintillation properties of Pr-doped Y3Al5O12, Lu3Al5O12, Y2SiO5 Lu2SiO5 single crystals. The processes determining the kinetics fast Pr3+ 5d–4f radiative transition are described. Among studied host materials, only Lu3Al5O12 presents neither any 5d1–4f state nonradiative quenching nor ionization at room temperature. evaluate figure merit all materials for application as scintillators. most promising system appears to be : Pr, since...
Ce1%, 2% and 3% doped Gd <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> (Ga,Al) xmlns:xlink="http://www.w3.org/1999/xlink">5</sub> O xmlns:xlink="http://www.w3.org/1999/xlink">12</sub> (GAGG) single crystals were grown by the Cz method. Luminescence scintillation properties measured. Light yield change along growth direction effects of Ce concentration on in Ce:GAGG studied. <sup xmlns:xlink="http://www.w3.org/1999/xlink">3+</sup> 5d-4f...
Pr-doped Lu3(GaxAl1−x)5O12:Pr, x=0–1, single crystals were grown by the micro-pulling-down method. We study luminescence and scintillation characteristics of sample set focusing on their dependence gallium content. For x=0.4 we obtain high figure-of-merit material with elevated density, efficiency, very fast response below 20ns without any slower components. Improvement performance is explained as due to absence antisite LuAl defects that was for first time realized in such bulk garnet from...
The X-ray single crystal structure determination of Lu2O3 sesquioxide and polycrystalline transparent ceramic fabricated by the unconventional spark plasma sintering (SPS) method is presented for first time. High quality crystals samples were obtained using both micropulling-down (μ-PD) laser heated pedestal growth (LHPG) technique. SPS promising obtaining high-density ceramics with fine grains at a relatively low temperature within short holding structural characterizations helped to...
Ce2%: <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">6</sup> LiCaAlF <sub xmlns:xlink="http://www.w3.org/1999/xlink">6</sub> ( LiCAF) single crystal (nominal composition) with 2 mm in diameter and 50 length was grown by the micro-pulling-down method. Emission from perturbed Ce xmlns:xlink="http://www.w3.org/1999/xlink">3+</sup> centers observed an ¿-ray excited radioluminescence. The neutron response compared Li-glass (GS20, Saint-Gobain) using...
Various fundamental characteristics of Y2O3 ceramics, such as optical transmittance, reflectivity, absorption coefficient, refractive index, and dielectric constant, were investigated. Furthermore, in order to evaluate the possible application this material γ-ray scintillator, other radiation responses, like α-ray excited emission spectrum, pulse height light yield, nonproportionality, energy resolution, scintillation decay curves obtained. The yield ceramics was evaluated about 1.13 times...
To observe time and wavelength-resolved scintillation events, picosecond pulse X-ray excited streak camera system is developed. The wavelength range spreads from vacuum ultraviolet (VUV) to near infrared region (110–900 nm) the instrumental response function around 80 ps. This work describes principle of newly developed instrument first performance test using BaF2 single crystal scintillator. Core valence luminescence peaking 190 220 nm clearly detected by our system, decay turned out be 0.7...
The 3 inch size Mg co-doped Ce : Gd <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> Al xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> Ga O xmlns:xlink="http://www.w3.org/1999/xlink">12</sub> single crystals were prepared by the Czochralski (Cz) method. Absorption and luminescence spectra measured together with several other scintillation characteristics, namely decay light yield to reveal effect of co-doping. timing resolution...
Participation of shallow and deep traps in the processes energy transfer capture is studied by means timeresolved emission spectroscopy thermoluminescence several groups Ce 3+ Pr -doped complex oxide single crystal scintillators.Tunnelling-driven recombination are distinguished all examined materials: closely spaced electron hole give rise to 1 phosphorescence decays at low temperatures Ce-doped aluminum garnets perovskites, while thermally assisted tunneling process proposed explain...
A novel scintillation crystal (Ce0.01,Gd0.90,La0.09)2Si2O7 (Ce:La-GPS) was grown by the floating zone method, and its optical properties were investigated. The emission wavelength of this material 390 nm. Gamma ray excited pulse height decay measurement showed that Ce:La-GPS had a high energy resolution (FWHM) 5% at 662 keV, light output 36,000 photons/MeV fast time 46 ns.
The role and effect of stable Ce <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">4+</sup> centers in Ce-doped LuAG single crystal scintillator is further studied by means measurements several optical, luminescence scintillation characteristics. Two LuAG:Ce samples are compared: one them the dominating xmlns:xlink="http://www.w3.org/1999/xlink">4 +</sup> center stabilized high concentration Mg xmlns:xlink="http://www.w3.org/1999/xlink">2+</sup>...