The Journal of Kharkov National University, Vol. 832,
Physical series "NUCLEI, PARTICLES, FIELDS", Issue 4 /40/, 2008
| A.V. Zhovtan, S.N. Roshchupkin
Closed superconducting cosmic strings in the cylindrical-symmetric fields of Einstein-Maxwell (Rus.)
| V.V. Kotlyar, A.O. Shcheglova
Srtucture of tensor representation for threeľnucleon boundľstate wave function (Rus.)
| V.D. Sarana, N.A. Shlyahov
Vector analyzing power for 9┬ň(d,a)7Li reaction at the low deuteron energies and contribution of the direct two-nucleon transfer mechanism (Rus.)
| A.T. Kotvitskiy, D.V. Kryuchkov
The generalized equation of gravitation in type models f (Rabgd ) (Rus.)
| S.K. Andruhovich, V.P. Bozhko, A.N. Vodin, S.N. Olejnik, S.A. Soldatov, E.A. Rudak, O.I. Jachnik
Modelling of spectra and yield of protons of feedback from hydrogenous film at their irradiation fast neutrons (Rus.)
| N.A. Azarenkov, A.I. Velikodniy, V.G. Kirichenko, Ď.└. ╩ţvalenko, M.G. Kompaniets, S.Yu. Kochetova
Electromagnetic pulse generation at cyclic reversal magnetization of wrought ferromagnetic alloys (Rus.)
| I.I. Papirov, A.A. Nikolaenko , V.A. Shkuropatenko, G.S. Koshkarev
Structural and textural analysis rolled sheets of beryllium (Rus.)
| V.G. Kirichenko, E.S. Melnikova
Multiscale structures forming on the graphite surface (Rus.)
| A.A. Zakharchenko, A.A. Veryovkin, V.E. Kutny, A.V. Rybka, M.A. Khazhmuradov
Simulation of response function of CdZnTe detectors for gamma-radiation dosimetry (Rus.)
| V.T. Lazurik, V.M. Lazurik, G. Popov, Yu. Rogov, Z. Zimek
Integration of computation methods in radiation sterilization process
| V.T. Lazurik, V.G. Rudychev, D.V. Rudychev
Optimization of the irradiation parameters with the aim of Ň-ray treatment of maximal thickness articks (Rus.)
| R.V. Vovk, I.L. Gulatis, M.A. Obolenskii, A.A. Zavgorodny, A.V. Samoilov
Redistribution of labile oxygen and phase stratification in strongly underdoped by oxygen ReBa2Cu3O7-d (Re=Y, Ho) single crystals (Ukr.)
| R.V. Vovk, A.A. Zavgorodniy, M.A. Obolenskii, K.A. Kotvitskaya, A.V. Samoylov
Temperature dependenses of psedogap in ReBa2Cu3O7-d (Re=Y, Ho) single crystals with different oxygen contents (Ukr.)
| V.┼. Kovtun, N.I. Navalĺnev
Welding titanium and stainless steel cryogenic sections of the electron collider ILC (Rus.)
VECTOR ANALYZING POWER FOR 9┬┼(d,a)7LI REACTION AT THE LOW DEUTERON ENERGIES AND CONTRIBUTION OF THE DIRECT TWO-NUCLEON TRANSFER MECHANISM
V.D. Sarana, N.A. Shlyahov
Full Text : (880 kB, Rus.)
The possibility of the description of the previously obtained experimental data for angular distributions of differential cross section and VAP and energy dependence VAP of the reactions
9┬ň(d,a)7Li, induced by vector-polarized deuterons with energies from 1,4 to 3,0 MeV, in the framework of DWBA is considered. The satisfactory fitting of the zero range DWBA
calculations to date for angular distributions of the cross section and VAP for reaction 9┬ň(d,a1)7Li (0,48 ╠ř┬ ½-) is obtained. The particular angular distribution properties of the
measured observables for transition to ground state of the 7Lio.c. only with cut-off of the radial integrals, what may to point importance of the finite range interaction, is reproduced.
However, calculation with FRDWBA to be unable reproduced second peak in the angular distribution of the cross section for this transition. The basic tendency of the energy
dependencies of VAP for both transitions were described on average using parameterizations obtained by analysis of the angular distributions. At the same time the presence of sharp
anomalies from mentioned tendency points to strong interference effects concerned with possible contribution of the states of the compound nucleus, although direct process is
predominant both at forward and backward angle regions.
KEY WORDS: nuclear reaction, beryllium, two-nucleon pick-up, cross section, VAP, angular distribution, energy dependence, DWBA, zero and finite rang.
MODELLING OF SPECTRA AND YIELD OF PROTONS OF FEEDBACK FROM HYDROGENOUS FILM AT THEIR IRRADIATION FAST NEUTRONS
S.K. Andruhovich, V.P. Bozhko, A.N. Vodin, S.N. Olejnik, S.A. Soldatov, E.A. Rudak, O.I. Jachnik
Full Text : (250 kB, Rus.)
The mathematical model of fast neutron interaction with hydrogen nuclei containing in thin films is developed. The computer code "NP-Recoil" is created to calculate the recoil proton
spectra and yields by the Monte-Carlo method. The algorithm is based on the (n,p)-reaction kinematics and recoil proton energy losses in the film without taking into account the multiple
proton scattering. The calculations of recoil proton spectra and yields from the polyethylene films are carried out for the neutron energy 1 - 15 MeV at angles 0 - 90°. It is found that the
received results are satisfactorily conformed to the calculations by the MCNPX code.
KEY WORDS: fast neutrons, recoil protons, proton spectra and yields, hydrogenous film, mathematical model.
STRUCTURAL AND TEXTURAL ANALYSIS ROLLED SHEETS OF BERYLLIUM
I.I. Papirov, A.A. Nikolaenko , V.A. Shkuropatenko, G.S. Koshkarev
Full Text : (2900 kB, Rus.)
Influence of rolling temperature, metal purity, total and unite strain level, temperatures and duration of annealing on dislocation structure, texture and mechanical properties of beryllium
sheets is studied. It is established, that the optimum combination strength and plastic properties is reached in a material with generated low-dislocation subgrain structure. Realizations of
such substructure promote high temperatures of deformation (above temperature of recrystallization) and purity of material. Optimum condition of rolling beryllium sheets are defined:
temperature 850-900°Đ at unite strain level up to 30%.
KEY WORDS: beryllium, rolling of beryllium, beryllium sheet, structure, texture, mechanical properties.
SIMULATION OF RESPONSE FUNCTION OF CDZNTE DETECTORS FOR GAMMA-RADIATION DOSIMETRY
A.A. Zakharchenko, A.A. Veryovkin, V.E. Kutny, A.V. Rybka, M.A. Khazhmuradov
Full Text : (300 kB, Rus.)
A procedure allowing to obtain a response function of CdZnTe planar detector used for gamma-ray dosimetry is developed based on the Monte-Carlo method. For reliable reconstruction
of the detector response function the experimental spectra only from three sources: 241Am, 152Eu and 137Cs will suffice. The proposed method was used for the calculation of the
discrete sensitivity of CdZnTe dosimeter detector module.
KEY WORDS: response function, CdZnTe, detector, gamma-radiation, dosimetry, Monte-Carlo method, EGSnrc.
INTEGRATION OF COMPUTATION METHODS IN RADIATION STERILIZATION PROCESS
V.T. Lazurik, V.M. Lazurik, G. Popov, Yu. Rogov, Z. Zimek
Full Text : (290 kB, Eng.)
Authors have developed the computer technology for simulation of practical tasks in radiation sterilization process in accordance with Method 1, Standard ISO 11137 and IAEA Code of
Practice. The technology was realized on the base of the RT-Office modules for modeling by Monte Carlo method of an absorbed dose in an irradiated heterogeneous targets with electron
beam (EB), X-ray and gamma-ray and specialized software ModeSAL. The software ModeSAL was used for simulation and comparative analysis of a sterility assurance level (SAL) and a
sterilizing dose for bioburden to achieve a required SAL in an irradiated product. The mathematical approach of the technology is based on the detailed and precise consideration of a self-
consistent physical and geometrical models of calculation an EB, X-ray and gamma-ray dose maps in an irradiated product, a SAL, a sterilizing dose and the spatial and time uncertainties for
dose provided to an irradiated product. The analysis of interrelations between parameters of EB radiation facility and values of a SAL and a sterilizing dose are considered.
KEY WORDS: radiation sterilization, Standard ISO 11137, RT-Office, software ModeSAL, dose map
REDISTRIBUTION OF LABILE OXYGEN AND PHASE STRATIFICATION IN STRONGLY UNDERDOPED BY OXYGEN ReBa2Cu3O7-d (Re=Y, Ho) SINGLE CRYSTALS
R.V. Vovk, I.L. Gulatis, M.A. Obolenskii, A.A. Zavgorodny, A.V. Samoilov
Full Text : (360 kB, Ukr.)
In present work, effect of annealing at room temperatures on conductivity in the base plane of oxygen deficient ReBa2Cu3O7-d (Re=Y, Ho) single crystals hard-tempered from the
temperatures 600-650°C are investigated. It is shown that in the process of annealing takes place considerable to transformation of form of superconductivity transitions. It is explained
the got results by the equipment modern with amenities of labile oxygen without the change of his concentration in a bulk. The results can be explained by the ordering of the labile
oxygen without changing its concentration in the sample. The estimation of the cluster sizes is characterized by the differences in oxygen content. We perform a comparative analysis
between the experimental data with the estimations, within the frame of the high temperature superconductivity cluster theory.
KEY WORDS: HTSC, annealing, labile oxygen, ReBa2Cu3O7-d (Re=Y, Ho) single crystals, pseudo-gap state, superconducting clusters
TEMPERATURE DEPENDENSES OF PSEDOGAP IN ReBa2Cu3O7-d (Re=Y, Ho) SINGLE CRYSTALS WITH DIFFERENT OXYGEN CONTENTS
R.V. Vovk, A.A. Zavgorodniy, M.A. Obolenskii, K.A. Kotvitskaya, A.V. Samoylov
Full Text : (640 kB, Ukr.)
In present work the temperature dependence of the ab-plane conductivity of ReBa2Cu3O7-d (Re=Y, Ho) single crystals with the system of the unidirectional twin boundaries was
investigated. The excess conductivity Δσ(Ď) for the ReBa2Cu3O7-d (Re=Y, Ho) single crystals shows exponential dependence in the wide temperature range Tf < Ď < T*. In addition ratio Δσ~(1-Ď/Ď*)exp(Δ*ab/T) can be interpreted in the mean field theory, where Ď* represents as mean field temperature of superconducting transition and temperature dependence of the
pseudogap can be described satisfastionaraly in term of crossover BSC-BEK theory. Decrease of oxygen show the wider temperature range of PA realization but linear part of ρ(Ď) in ab - plane becomes narrower.
KEY WORDS: excess conductivity, doping, Y┬aCuO single crystals, high temperature superconductivity, crossover, pseudogap state.