A5090203258- Luminescence Properties of Advanced Materials
- Radiation Detection and Scintillator Technologies
- Solid State Laser Technologies
- Atomic and Subatomic Physics Research
- Inorganic Fluorides and Related Compounds
- Solid-state spectroscopy and crystallography
- Glass properties and applications
- Nuclear Physics and Applications
- Photorefractive and Nonlinear Optics
- Crystal Structures and Properties
- Medical Imaging Techniques and Applications
- Terahertz technology and applications
- Semiconductor materials and devices
- Silicon Nanostructures and Photoluminescence
- Perovskite Materials and Applications
- Nanowire Synthesis and Applications
- Nuclear materials and radiation effects
- Optical and Acousto-Optic Technologies
- Optical properties and cooling technologies in crystalline materials
- Atomic and Molecular Physics
- X-ray Diffraction in Crystallography
- Advanced X-ray Imaging Techniques
- Ga2O3 and related materials
- Advanced Semiconductor Detectors and Materials
- Electric Power Systems and Control
Lomonosov Moscow State University
2010-2023
Perm National Research Polytechnic University
2017-2018
Kurchatov Institute
2017
Moscow State University
2010
Centre National de la Recherche Scientifique
1999-2005
Université Claude Bernard Lyon 1
1999-2005
Daresbury Laboratory
1994
Engineering and Physical Sciences Research Council
1994
Calculations of the band structure, partial densities states and optical spectra permittivity, reflectivity absorption perfect ZnMoO 4 crystal were performed using full-potential linear-augmented-plane-wave method.It is shown that calculated reproduce main features corresponding experimental in fundamental region.The bandgap value estimated as E g = 4.3 eV.Peculiarities luminescence excitation corrected for near-surface losses on are discussed, taking into account results calculations.It...
Abstract Zinc molybdate is considered as an alternative to the sheelite‐type crystals for cryogenic scintillating bolometers. We report results of first investigation luminescent properties bulk ZnMoO 4 single grown by Czochralski method. The temperature dependence luminescence intensity under different excitation energies was studied, optical characteristics zinc are presented. potential crystal a material at low demonstrated. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Ceramics of quaternary garnets (Gd,Y)3Al2Ga3O12 doped with Ce, Tb have been fabricated and evaluated as prospective materials for indirect energy converters α-and β-voltaic. Samples were characterized at excitation an X-ray source intense 150 keV electron beam showed good temperature stability their emission tolerance to irradiation. The role X-rays accompanied the α-particle emitting in increase conversion efficiency is clarified. garnet-type structure matrix developed allows production...
Thin-film diamond–rare earth fluoride nanocomposites have been produced by chemical vapor deposition to be used as a source of intensive photo- and X-ray luminescence. The composites with embedded Eu-containing nanoparticles show high-intensity orange narrow-band photoluminescence near the wavelength 612 nm. Using β-NaGdF4:Eu instead Eu(III) tri-(2,6-pyridine dicarboxylic acid) europium in diamond matrix resulted enhanced signal/noise ratio mapping spatial distribution intensity on macro-...
Technological factors and processes contributing to the scintillation mechanism have been considered in quaternary garnet ceramics doped with Ce(Gd,Lu)3Al2Ga3O12. The super-stoichiometric additive of gadolinium material composition or its co-doping a low concentration Mg were found be effective tools suppress phosphorescence garnet, confirming that it is not an intrinsic property material. Monte-Carlo simulation electronic excitation transfer demonstrates hopping migration along sublattice...
For single crystals of YAG–15 mol% Yb, LuAG–15 Yb and YAP–8 the temperature dependence charge-transfer (CT) f–f luminescence Yb3+ excited in CT absorption band range 7–300 K has been studied. Simulation experimental data taking into consideration three processes, photoionization state radiative non-radiative energy transfer to 4f levels, demonstrated that for adequate description relaxation it is essential get information on direct excitation efficiency as well study role intrinsic ytterbium...
A mechanism of firefly high‐scintillation light yield (LY) Tb‐doped quaternary (Gd, Y) 3 Al 2 Ga O 12 garnet ceramics is reported. Through measurements with the synchrotron source, high efficiency luminescence excitation, providing a quantum Q > 1 below photon multiplication energy range, defined. The excitation reaches two at slightly above E g . cascade photons explained by combining three factors: first, ≈ in lower mixed states 4f 7 5d spin (HS) and low (LS); second, cross‐relaxation (...
Abstract Both calcite and vaterite polyerystalline phases of LuBO3 doped with cerium praseodymium have been prepared their fluorescence properties investigated in the visible, near UV VUV regions. The systems exhibit a strong rapid UV-blue typical 5d → 4f parity-allowed transitions dopants. It is shown that excitation transfers from excitions electron-hole pairs to dopants are very efficient. light yield can be three times more efficient than well-known Bi4Ge3O12 scintillator for best samples.
Two series of (Gd, Y, Yb)3Al2Ga3O12 quintuple compounds with a garnet structure and solely doped Ce Tb were prepared in the form ceramics by sintering oxygen at 1600 °C for two hours studied interaction activator ions ytterbium entering matrix. It was shown that photoluminescence scintillation Ce3+ are completely suppressed, predominantly tunneling ionization through charge transfer state (CTS) Ce4+-Yb2+ ions. The Tb3+ is quenched presence ytterbium, but not due to poor resonance conditions...
Luminescence excitation spectra of a wide variety undoped and doped (by rare-earths or transition elements) crystals with alkali-earth cations complex oxyanions, either octahedral (ZrO32−, CeO32−) tetrahedral (SO42−, WO42−, PO43−), have been measured using synchrotron radiation the "Siberia-1" storage ring in energy range exciting photons several bandgaps (up to 35 eV). An attempt is made work out uniform approach treatment luminescence such systems based on common tendencies observed spectra.
GYAGG:Tb (Ce) scintillators have been confirmed to be promising sources of light emission when excited by an intense 150 keV electron beam. The saturation the scintillation yield under such excitation conditions has studied. To explain results obtained, a model that considers Auger quenching mechanism was used. Ce-doped material did not show saturation, whereas moderate 30% drop measured in Tb-doped sample at highest beam intensity ~1 A/cm2. This put forward way exploit scintillator for...
Characteristic dimensions and evolution times of regions secondary electronic excitations created by the interaction ionizing radiation with matter cannot be measured directly. At same time these are essential parameters both for engineering nanostructured composite materials defining optimal layer thickness nanoparticles radii development optimized scintillators. The paper demonstrates how such spatial temporal data can extracted from luminescence decay kinetics excited vacuum ultraviolet...