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  • Spectral properties of partial automorphisms of a binary rooted tree 
    Kochubinska, E. (Algebra and Discrete Mathematics, 2018)
    We study asymptotics of the spectral measure of a randomly chosen partial automorphism of a rooted tree. To every partial automorphism x we assign its action matrix Ax. It is shown that the uniform distribution on eigenvalues ...
  • Spectral properties of reflective interference filters 
    Pervak, V.Yu.; Poperenko, L.V.; Pervak, Yu.A. (Semiconductor Physics Quantum Electronics & Optoelectronics, 2001)
    The spectral properties of band reflective interference filters are investigated. The operation of the filter is based on the method of residual rays. Angular dependences of the filter transmission bandshape on the parameters ...
  • Spectral properties of the two-dimensional multiwell potential 
    Chekanov, N.A.; Shevchenko, E.V. (Вопросы атомной науки и техники, 2007)
    Two-dimensional multiwell Hamiltonian system with four local minima is considered. The motion of the system shifts from regular to chaotic through “mixed state”, i.e. the state, when regular and irregular regimes of motion ...
  • Spectral theory and Wiener-Itô decomposition for the image of a Jacobi field 
    Berezansky, Yu.M.; Pulemyotov, A.D. (Український математичний журнал, 2007)
    Assume that K⁺ : H_ → T_ is a bounded operator, where H_ and T_ are Hilbert spaces and ρ is a measure on the space H_. Denote by ρK the image of the measure ρ under K⁺. This paper aims to study the measure ρK assuming ρ ...
  • Spectra of Cherenkov and transition radiation excited by a train of electron bunches in dielectric structures of rectangular cross-section 
    Onishchenko, I.N.; Onishchenko, N.I.; Sotnikov, G.V. (Вопросы атомной науки и техники, 2006)
    The peculiarities of radiation spectra of a single relativistic electron bunch or train of bunches in an infinite rectangular dielectric waveguide, in a semi-infinite dielectric waveguide, and in a dielectric waveguide ...
  • Spectra of coherent bremsstrahlung and radiation formed by 0.8 GeV electrons moving near the axis and plane of diamond crystal 
    Ganenko, V.B.; Zhebrovskij, Yu.V.; Kolesnikov, L.Ya.; Rubashkin, A.L. (Вопросы атомной науки и техники, 2000)
    Spectra of coherent bremsstrahlung and radiation spectra of the electron moving near the axis and plane of diamond crystal have been measured using the electron beam of low intensity with 0.8 GeV energy. Experimental data ...
  • Spectra of cosmic ray electrons and positrons in the Galaxy 
    Lagutin, A.A.; Osadchiy, K.I.; Gerasimov, V.V. (Вопросы атомной науки и техники, 2001)
    A new study of the cosmic ray electron and positron spectra is presented, using an anomalous diffusion model to describe the particles propagation in the Galaxy. The parameters defining the anomalous diffusion have been ...
  • Spectra of locally matrix algebras 
    Bezushchak, O. (Algebra and Discrete Mathematics, 2021)
    We describe spectra of associative (not necessarily unital and not necessarily countable-dimensional) locally matrix algebras. We determine all possible spectra of locally matrix algebras and give a new proof of Dixmier–Baranov ...
  • Spectra of low-energy secondary electrons in the interaction of relativistic electrons with aluminum foil 
    Vit’ko, V.; Kovalenko, G.; Karpus, S.; Semisalov, I.; Shopen, O. (Problems of Atomic Science and Technology, 2022)
    The integral yields of secondary low-energy electrons (with energies up to 50 eV) in the interaction of primary electrons 10…30 MeV with 50 μm aluminum foil have been studied. It is shown that the proposed method for ...
  • Spectra of pyroelectric X-ray generator 
    Nagaychenko, V.I.; Sanin, V.M.; Yegorov, A.M.; Shchagin, A.V (Вопросы атомной науки и техники, 2004)
    The construction of X-ray generator based on a pyroelectric crystal LiNbO₃ is described. Some properties of radiation spectra from the X-ray generator are presented. Measurements of the spectra were performed at heating ...
  • Spectra of the photo-electric phenomena physically differentiated on the light absorption factor 
    Berezhinsky, L.I.; Venger, E.F.; Matyash, I.E.; Serdega, B.K. (Semiconductor Physics Quantum Electronics & Optoelectronics, 2004)
    The pleochroism phenomena in photoconductivity of Ge samples and gate photoelectomotive force (photo-emf) of Si samples were experimentally investigated by a polarization modulation method. Anisotropy of dielectric properties ...
  • Spectra of transverse excitations in liquid glass-forming metallic alloy Mg₇₀Zn₃₀: temperature dependence 
    Bryk, T.; Mryglod, I. (Condensed Matter Physics, 1999)
    The temperature dependence of the dispersion and damping coefficients of transverse excitations in metallic alloy Mg₇₀Zn₃₀ at the number density n= 0.0435 A⁻³ is studied using the method of generalized collective modes. ...
  • Spectrol properties of symplectic integrators for problem on motion of a free rigid body 
    Khlistunova, N.V. (Механика твердого тела, 2003)
    In this paper a new approach useful for numerical integration of the motion equations for a free rigid body with a fixed point is studied. The approach employs symplectic integration schemes of the second and third order. ...
  • Spectrometer for detailed study of radon and thoron system decay products 
    Frolov, O.S.; Sadovnichy, A.A.; Pavlenko, Yu.N.; Shevchenko, V.A.; Zaytsevsky, I.L.; Podviyaniuk, R.B.; Pavlenko, I.O. (Вопросы атомной науки и техники, 2004)
    The results of development of an aspiration type spectrometer for investigation of daughter products of radon and thoron are presented. Main parameters of the device: active detector area of 32 cm2, air pumping through ...
  • Spectrometric registration of x-ray and gamma radiation by detecting modules “silicon planar detector - scintillator” 
    Bochek, G.L.; Kapliy, А.A.; Kiprich, S.K.; Kovalenko, G.D.; Maslov, N.I.; Ovchinnik, V.D.; Semisalov, I.L.; Shirokopetlev, F.O.; Shlyahov, I.N.; Shulika, M.Yu.; Vasiliev, G.P.; Yalovenko, V.I. (Problems of Atomic Science and Technology, 2022)
    The use of detection modules based on a silicon planar uncooled detector and a scintillator in combination with readout electronics makes it possible to create detection complexes for spectrometric detection of X-ray and ...
  • Spectrometric stand for measuring the energy resolution of unpackaged elements of silicon planar detectors 
    Kapliy, O.A.; Kiprich, S.K.; Maslov, N.I.; Ovchinnik, V.D.; Potin, S.M.; Shliakhov, I.N.; Shulika, M.Yu.; Vasiliev, G.P.; Yalovenko, V.I. (Вопросы атомной науки и техники, 2021)
    A spectrometric stand for measuring the energy resolution of unpackaged single-channel silicon planar detectors has been developed and manufactured. The developed spectrometric stand makes it possible to reject detectors ...
  • Spectrophotometer for atmospheric ozone research – receiver reaction of irradiation with complex spectral composition 
    Stoyanov, S. (Економіка природокористування і охорони довкілля, 2013)
    One of the basic problems in elaboration of spectro-photometer for atmospheric ozone research at the Space Research and Technologies Institute – Bulgarian Academy of Sciences seems to be the necessity of calculation of ...
  • Spectrophotometric determinationof trace nitrite with a novel self-coupling diazotizing reagent: J-acid 
    Wei Wu; Wenhuan Wenjian Shi; Yuanxing Huang; Haixin Gu; Jingzhi Wang; Wenxuan Feng (Химия и технология воды, 2015)
    A simple and sensitive method for the spectrophotometric determination of nitrite was described and optimum reaction conditions along with other important analytical parameters were established. In the presence of potassium ...
  • Spectrophotometry and electrical conductivity studies of multiwall nanotubes dispersed in nematic liquid crystals 
    Lisetski, L.N.; Lebovka, N.I.; Sidletskiy, O.Ts.; Panikarskaya, V.D.; Kasian, N.A.; Kositsyn, S.S.; Lisunova, M.O.; Melezhyk, O.V. (Functional Materials, 2007)
    Optical transmission and electric conductivity were measured as a function of temperature for thin layers of multiwall nanotubes (MWNTs) dispersed in a mixture of cyanobiphenyl nematic liquid crystals (LC) ZhK-1282. At ...
  • Spectroscopically detected segregation of Pr³⁺ ions in YPO₄:Pr³⁺ nanocrystals 
    Seminko, V.V.; Maksimchuk, P.O.; Kononets, N.V.; Masalov, A.A.; Boyko, Yu.I.; Malyukin, Yu.V. (Functional Materials, 2012)
    Segregation of Pr³⁺ ions in YPO₄:Pr³⁺nanocrystals was revealed by means of spectroscopic techniques. Increase of doped ions concentration in the near-surface layer of YPO₄:Pr³⁺ nanocrystals was confirmed by modification ...