The Journal of Kharkov National University, Vol. 823,
Physical series "NUCLEI, PARTICLES, FIELDS", Issue 3/39/, 2008
| A.I. Kondrik, G.P. Kovtun
Vanadium-based alloys for fusion energetics (Rus.)
| V.G. Kirichenko, A.I. Kirdin
Nuclear-physical metallography of zirconium alloys (Rus.)
| A.I. Kalinichenko, V.E. Strel'nitskij
Brittle subsurface destruction of solid under bombardment of low-energy ions (Rus.)
| Y.V. Rudychev, R.P. Slabospitskij, M.A. Khazhmuradov
Physical background and modeling of facility construction for transmutation of some elements of radioactive waste using thermonuclear neutrons (Rus.)
| D.V. Kutniy, V.E. Kutniy, N.P. Odeychuk, V.E. Tovkanetz, A.V. Rybka, A.A. Zakharchenko
Use of the active well coincidence counter for the semiconductor neutron detector development (Rus.)
| N.P. Dikiy, A.N. Dovbnya, E.P. Medvedeva, N.P. Khlapova, I.D. Fedorets, V.L. Uvarov, Yu.V. Lyashko
Gamma activation and spectral analysis of element composition, structure and sorption activity of radiation synthesized magnetite nanoparticles (Rus.)
| S.A. Dushkin, V.A. Odinets, A.N. Orobinskiy
Influence of dead time on inaccuracy at measurement of characteristics of ionizing radiations (Rus.)
| A.V. Shchagin
The difference between frequency of parametric X-ray radiation and Bragg frequency (Rus.)
| V.A. Lisovskiy
Normal mode of rf discharge in ammonia (Rus.)
| V.A. Lisovskiy, N.D. Kharchenko, V.D. Yegorenkov
Experimental investigation of the RF discharges radial structure (Rus.)
| R.V. Vovk, M.A. Obolenskii, A.A. Zavgorodny, A.M. Corsunskiy
Incoherent transport and pseudogar in Ío1Ba2Cu3O7-δ Single crystals with a different oxygen content (Ukr.)
| I.L. Gulatis, M.A. Obolenskii, R.V. Vovk, A.A. Zavgorodniy, K.A. Kotvitskaya
Pseudogap state in slightly doped by aluminium YBaCuO single crystals with a given topology of plane defects (Ukr.)
| V.I. Sokolenko, I.F. Borisova, I.N. Butenko, E.V. Karasjova, D.G. Malykhin, A.V. Matz
X-Ray studies of microstructure and texture of zirconium after large plastic deformation at 100 K and 300 K (Rus.)
| V.V. Slezov, I.I. Papirov, A.G. Shepelev
Discovery of the Shubnikov phase (type II superconductors) (Rus.)
NUCLEAR-PHYSICAL METALLOGRAPHY OF ZIRCONIUM ALLOYS
V.G. Kirichenko, A.I. Kirdin
Full Text : (4150 kB, Rus.)
Òhe principles of nuclear-physical metallurgy of zirconium alloys by using nuclear gamma resonance (Mossbauer effect) were considered. The results of nuclear-physical investigations of
hyperfine interactions and phase transformations in zirconium alloys under complex thermomechanical treatment, irradiation and corrosion were described. The results of physical
metallurgy simulation of nuclear transmutation effects in zirconium alloys were stated. The microstructure of simulated transmutation effects ternary alloys differs from microstructure of
source alloys and it is determine by crystallization modes of binary and ternary zirconium alloys. The ensembles of intermetallic particles formed after thermal and mechanical treatment
with final isochronous ageing in temperature range from 570 Ê to 1070 Ê are characterized by different connection type with zirconium matrix and increased intermetallic phases
concentration in surface layers with depth up to 0,3μm. The obtained concentration-isomer shift-quadrupole splitting 3D-diagram and isomer shift dependences on quadrupole splitting
enabled experimental data correct handling and surely identify the phases in crystalline and amorphous zirconium alloys. High mobility of phase intermetallic particles in zirconium matrix are
revealed. Zirconium alloys corrosion in high parameters water leads to formation of heterogeneous phase oxide films contained iron in oxide amorphous phases and in intermetallic phases.
Admixture electron structure in zirconium effect on structure and phase transformations appears as transference of charge and electron density during intermetallic phases forming and as
correlation of segregation factor, corrosion stability and admixture implantation energy dependences on Miedema's electronegativity.
KEY WORDS: nuclear-physical methods, hyperfine interactions, Mossbauer effect, zirconium, alloying, surface, electron structure, irradiation, corrosion.
USE OF THE ACTIVE WELL COINCIDENCE COUNTER FOR THE SEMICONDUCTOR NEUTRON DETECTOR DEVELOPMENT
D.V. Kutniy, V.E. Kutniy, N.P. Odeychuk, V.E. Tovkanetz, A.V. Rybka, A.A. Zakharchenko
Full Text : (1100 kB, Rus.)
The opportunity of neutron registration from isotopic source 241AmLi by solid state semiconductor detector based on high purity germanium and Cd-converter was reviewed. The
measurement of gamma background of isotopic neutron source 241AmLi in the range 200…800 keV was conducted. The main gamma-ray lines with an intensity ≥ 2 × 10-6 % were
identified. It was founded that the appearance of prompt gamma-rays 558.6 and 651.3 keV was a result of neutrons and Cd-converter interaction. Efficiency of neutrons registration by
coaxial germanium detector ? 50,5 × 42,5 mm was estimated.
KEY WORDS: neutron, detector, gamma-irradiation, 241AmLi, converter, Cd, nuclear reactor, efficiency of registration.
GAMMA ACTIVATION AND SPECTRAL ANALYSIS OF ELEMENT COMPOSITION, STRUCTURE AND SORPTION ACTIVITY OF RADIATION SYNTHESIZED MAGNETITE NANOPARTICLES
N.P. Dikiy, A.N. Dovbnya, E.P. Medvedeva, N.P. Khlapova, I.D. Fedorets, V.L. Uvarov, Yu.V. Lyashko
Full Text : (380 kB, Rus.)
Solutions of ferrum sulphate and osmium tetroxide have been irradiated with bremssrahlung radiation from the electron accelerator in NSC KIPT. The elemental composition of the
synthesized nanoparticles of magnetite and Os has been studied with gamma-activation approach. The morphology, particle dimensions and particle size distributions, crystal lattice state,
optical and sorbtion properties of the synthesized nanomaterials were studied with the electron microscopy, with UV- Vis and IR-spectroscopy and with hemiluminiscent analysis. It was
demonstrated that the synthesized magnetite particles can be used as an magnetic-driven sorbent to pathogenic microorganisms.
KEY WORDS: nanoparticles of magnetite and osmium, electron accelerator, gamma activation analisis, optical density, IR - spectroscopy, biochemiluminescence.
INCOHERENT TRANSPORT AND PSEUDOGAR IN Ío1Ba2Cu3O7-δ SINGLE CRYSTALS WITH A DIFFERENT OXYGEN CONTENT
R.V. Vovk, M.A. Obolenskii, A.A. Zavgorodny, A.M. Corsunskiy
Full Text : (320 kB, Ukr.)
The temperature dependences of transversal electro-resistance of Ío1Ba2Cu3O7-δ single crystals with different oxygen content have been investigated. It is shown that in the case of
the connection Ío1Ba2Cu3O7-δ, unlike Y1Ba2Cu3O7-δ, at the increase of deficit of oxygen there is strengthening of processes of localization of carriers, which is accompanied by
transition from the PG-mode to the mode of conductivity with variable length hopping.
KEY WORDS: HTSC, pseudogap, Ío1Ba2Cu3O7-δ single crystals, incoherent transport, transversal conductivity, localization of carriers.
PSEUDOGAP STATE IN SLIGHTLY DOPED BY ALUMINIUM YBACUO SINGLE CRYSTALS WITH A GIVEN TOPOLOGY OF PLANE DEFECTS
I.L. Gulatis, M.A. Obolenskii, R.V. Vovk, A.A. Zavgorodniy, K.A. Kotvitskaya
Full Text : (330 kB, Ukr.)
In present work the temperature dependence of the ab-plane conductivity of YBa2Cu3-yAlyO7-δ single crystals with the system of the unidirectional twin boundaries was investigated.
The excess conductivity for the analyzed single crystals, within a wide temperature interval Tf < Ò < T*, is described by exponential temperature dependence. The temperature dependence
of pseudogap is satisfactorily described within the BCSh-BEK crossover theoretical model.
KEY WORDS: excess conductivity, doping, YÂaCuO single crystals, high temperature superconductivity, crossover, pseudogap state.
X-RAY STUDIES OF MICROSTRUCTURE AND TEXTURE OF ZIRCONIUM AFTER LARGE PLASTIC DEFORMATION AT 100 K AND 300 K
V.I. Sokolenko, I.F. Borisova, I.N. Butenko, E.V. Karasjova, D.G. Malykhin, A.V. Matz
Full Text : (220 kB, Rus.)
The microstructure of zirconium samples deformed by rolling on 92 % at 300 K and 100 K and annealed at 750 and 800 K is studied by modified approximation method with double-Voigt
methodology of analyses of physical X-ray lines half-width. The studies show the identity of all microstructure characteristics between deformed and also between annealed samples
without of dependence of working temperature. At this it is note an increasing crystallographic texture for low-temperature deformed zirconium. It is concluded that structure changes in
zirconium concerned to influence of working temperature becomes from middle structure scale and above that is confirmed by another studies.
KEY WORDS: X-ray analyses, zirconium, microscopic structure, texture, method of approximation, half-width, microstrains, particles size, creep.