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Chapter
Infrared Reflectivity, Inelastic Light Scattering and Energy Gap in a Y-Ba-Cu-O Superconductors
Below 93K the spectra of FIR reflection and inelastic light scattering of Y-Ba-Cu-O samples reveal the peculiarities related with superconducting gap and optical phonons. The magnitude of the gap is found to be 2...
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Article
Deformation Welding Of Scintillating Materials
Experiments on connecting scintillating crystals to form homogeneous pieces by means of plastical deformation are described. Optical transmission, radiation hardness, and scintillation spectra have been used f...
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Article
Structure Characteristics of Cubic and Orthorhombic Phases of High Density Scintillator Pbf2 from 4.2–300 K
An anomaly of the temperature dependence of the unit cell parameter has been observed for β-PbF2 single crystals at 200 K that is interpreted as a phase transition to a pseudocubic lattice. Such a pseudocubic pha...
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Article
Activation of Lead Fluoride Room Temperature Luminescence by Structural Modifications
The connection of lead fluoride luminescence properties with its structural characteristics has been studied. Single crystals of the cubic and orthorombic phases, cubic and orthorombic powders, pressure compac...
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Article
Comparative Studies of Optical Spectra in PbF2 at Different Excitations
The spectral characteristics for cubic and orthorhombic lead fluoride excited by light with energies of 5-2.5 eV, X-ray, and α-particles were studied. It is shown that the room temperature luminescence in orth...
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Article
Formation and growth of an α-PbF2 phase during the plastic deformation of β-PbF2 crystals
The microstructure of strained β-PbF2 crystals is investigated by optical and scanning electron microscopy. It is established that the α-PbF2 previously observed by x-ray diffraction methods during the straining ...
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Article
Properties of the microhardness of single-crystal C60 fullerite in sclerometric tests
The mechanical properties of single-crystal fcc C60 fullerite are investigated by sclerometry and precision contact profilometry. Quantitative estimates are obtained for the microhardness anisotropy on the (100) ...
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Article
“Isomorphous” phases in nanodispersed powders of rare-earth oxides
Using x-ray diffraction, a structural state consisting of two “isomorphous” phases was revealed in nanocrystalline powders of simple oxides Re 2O3 (Re = Eu, Gd, La, Lu) and Y3Ga5O12 prepar...
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Article
Optical phonon spectra of lutetium fluoride, oxyfluoride, and lutetium oxide nanoparticles
Nano-and microcrystalline LuF3 phases have been synthesized with particle sizes of 30 nm and 30 μm, respectively. Analysis of the IR reflection spectra measured at T = 300 K showed that the nanophase differs from...
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Article
Neutron detectors based on silicon photomultipliers
Neutron detectors comprising a new type of photosensors—silicon photomultipliers—coupled to a single-crystal LiI(Eu) scintillator and a 6LiF/ZnS(Ag) scintillation screen are described. These detectors are compact...
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Article
Scintillation fibers and nanoscintillators for improving the spatial, spectrometric, and time resolution of radiation detectors
Experimental examples demonstrate a significant improvement of the most important parameters (sensitivity; spatial, spectrometric, and time resolution; and radiation hardness) of radiation detectors with sensi...
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Article
Peculiarities of nanostructured silicon carbide films and coatings obtained by novel technique
A new method has been developed for obtaining various versions of nanostructured SiC films and coatings, whose structure can be altered in a controlled way for different applications. The films and coatings ob...
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Article
New shaped ceramics based on silicon carbide
New techniques have been developed for producing inexpensive shaped SiC ceramics with certain structure and porosity for a wide variety of applications. These techniques are based on the interaction of silicon...
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Article
Peculiarities of intrinsic background in LaBr3: Ce and CeBr3 scintillating crystals
The intrinsic background was measured in LaBr3:Ce and CeBr3 scintillating crystals grown at the Institute of Solid-State Physics of the Russian Academy of Sciences. The measurements were taken in the range of γ-r...
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Article
Physicochemical processes in a sonoplasma discharge
The experiments showed that the new form of electrical discharge that occurs in a liquid in an intense ultrasonic field above the cavitation threshold and exhibits volume glow throughout the space between elec...
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Article
Pulsed X-ray luminescence of composites consisting of inorganic particles and organic phosphors
A fast luminescence component with a duration of ∼2 ns has been observed upon pulsed X-ray excitation of composites composed of microparticles of a heavy constituent (heavy-metal oxides and fluorides) and opti...
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Article
Spectroscopy of composite scintillators
The spectral and temporal characteristics of X-ray luminescence of composites consisting of microparticles of “heavy” components (oxides, fluorides, sulfates) and an organic polymer binder containing optically...
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Article
Studying the characteristics of the spectrometric detector based on a LaBr3:Ce crystal and a ФЭУ-184 photomultiplier tube
Results of investigations of the scintillation detector based on a LaBr3:Ce crystal and a ФЭУ-184 photomultiplier tube are presented. It is shown that, optimizing the ФЭУ-184 photomultiplier tube circuit by readi...
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Article
Peculiarities of structure and properties of metal surfaces subjected to strain polishing
The influence of treatment by ball-type rolling on the structure and properties of polycrystalline copper and aluminum surfaces is analyzed. It is discovered that, depending on the speed of the linear motion o...
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Article
Features of structure and properties of biopolymer composites with inorganic nanoparticles
The morphology, atomic structure, and strength characteristics of composites of barium titanate and silicon dioxide nanoparticles with biopolymers (collagen, lignin, starch) were investigated. Both changes in ...
