The Journal of Kharkov National University, Vol. 784,
Physical series "NUCLEI, PARTICLES, FIELDS", Issue 4/36/, 2007
| A.N. Dovbnya, I.S. Guk, S.G. Kononenko, G.G. Koval’ev, A.Y. Mytsykov, F.A. Peev
Draft design of recirculator SALO magnetic system (Rus.)
| I.S. Guk, A.N. Dovbnya, S.G. Kononenko, M. van der Wiel, J.I.M. Botman, F.A. Peev
Variants of use superconducting electron accelerator SALO as a driver of subcritical accembly (Rus.)
| A.S. Kachan, I.V. Kurguz, I.S. Kovtunenko, V.M. Mischenko, V.A. Panin
Magnetic dipole resonance in 27Al nuclei (Rus.)
| D.D. Burdeinyi, V.B. Ganenko, Yu.P. Peresunko, I.M. Shapoval, G.A. Vashchenko
Particle distributions of main QED and background processes at interaction îf high energy photons with matter of photon polarimeter target (Eng.)
| A.I. Kalinichenko, S.S. Perepelkin, V.E. Strel'nitskij
Kinetic process acceleration in nanocrystalline materials at ion bombardment (Rus.)
| Î. Antufyev, A. Shishkin, Z. Kononenko, B. Weyssow
Impurity ion transport under the effect of drift-wave-like electrostatic field (Eng.)
| A.V. Eremin, A.A. Shishkin
D+D fusion products yield in torsatron large helical device (Eng.)
| S.A. Duplij, A.T. Kotvytskiy
Coincidence limit and generalized interaction term structure in multigravity (Eng.)
| I.I. Zalyubovsky, N.P. Dikiy, E.P. Medvedeva, I.D. Fedorets, T.V. Frolova, S.P. Shklyar
Application of photon activation method to the investigation of age trend in element content of child’s hear (Rus.)
| A.N. Dovbnya, V.B. Ganenko, I.S. Guk, S.G. Kononenko, A.S. Tarasenko
The electron beam lines from SALO recirculator to physical installation (Rus.)
| I.S. Guk, S.G. Kononenko, A.S. Tarasenko
The systems of tolerances, correction and indication of magnetooptical structure salo recirculator (Rus.)
| A.A. Zakharchenko, V.E. Kutny, D.V. Nakonechny, I.M. Prokhoretz, A.V. Rybka, M.A. Khazhmuradov
Methods of charge transport parameter determination for CdTe (CdZnTe) gamma-radiation detectors (Rus.)
| Yu.M. Gavriljuk, A.M. Gangapshev,V.V. Kazalov, V.V. Kuzminov, S.I. Panasenko, S.S. Ratkevich, I.D. Fedorets
Low-background spectrometer alpha-activity of different large samples (Rus.)
| N.P. Khlapova, J.S. Shpilevoy, V.G. Senchishin, A.P. Gavrik, N.S. Lutsay, V.N. Lebedev
Effects of light scattering in the plastic scintillator (Rus.)
| V.M. Khoroshikh, S.A. Leonov, V.A. Belous, G.I. Nosov, G.N. Kurilenko
Vacuum arc plasma parameters and the features of TiN coating deposition process for small dimension samples (Rus.)
| Yu.A. Kirochkin, A.Yu. Kirochkin
Motion of relativistic charges in the constant electromagnetic field of a cylindrical capacitor and a linear current flowing along its axis (Rus.)
| S.A. Pismenetskiy, V.B. Pyshkin, V.G. Rudychev, D.V. Rudychev
Spectral characteristics of VVER-1000 spent nuclear fuel which is intended for a dry storage keeping (Rus.)
| V.V. Vlasov
Superhigh frequency plasma source (Rus.)
| A.Yu. Berezhnoy, S.N. Utenkov
Computer code GAMMAPEAKS for treatment of g- spectra (Rus.)
VARIANTS OF USE SUPERCONDUCTING ELECTRON ACCELERATOR SALO AS A DRIVER OF SUBCRITICAL ACCEMBLY
I.S. Guk, A.N. Dovbnya, S.G. Kononenko, M. van der Wiel, J.I.M. Botman, F.A. Peev
Full Text : (800 kB, Rus.)
The opportunity of making in NSC KIPT the driver using superconducting accelerating structure TESLA is considered. The first variant guesses use as the driver part of equipment of the accelerating complex SALO project. The superconducting RF gun, the channel of transportation and injection of a beam in the accelerating structure, six accelerating modules and magnetic system of the first recirculator arch are used. It is supposed to gain beame with energy 130 MeV and a mean power 130 kw. Possible channels of beam transportation on subcritical assembly are viewed. Variants of focusing beam on a target are analyzed. The second variant guesses framing the linear superconducting accelerator with beam shift in an existing hall where it is possible to dispose subcritical assembly. This variant allows to exclude capital construction completely that will essentially reduce cost of facility.
KEY WORDS: recirculator, electron accelerator, subcritical assembly, superconducting accelerating structure, channel of transportation.
MAGNETIC DIPOLE RESONANCE IN 27Al NUCLEI
A.S. Kachan, I.V. Kurguz, I.S. Kovtunenko, V.M. Mischenko, V.A. Panin
Full Text : (320 kB, Rus.)
Gamma-decay of the resonance-like structures observed in the 26Mg(p,γ)27Al reaction in the energy range Ep = 0,8-3,0 MeV of accelerated protons was studied. Excitation function, γ-
ray spectra were measured for resonances at Ep = 2234, 2383, 2406, 2496, 2539 keV, which composed this resonance-like structure. The M1-resonance is identified on the ground state
and excited states of 27Al with E* = 844 and 1014 keV. The total strength of the M1-resonance on the ground state is determined for given nucleus. The position and total strength of M1-resonance on the ground state is explained by taking into account pairing forces.
KEY WORDS: 26Mg(p,γ)27Al reaction, M1 resonance, M1 transition, pairing-energy, giant resonance.
KINETIC PROCESS ACCELERATION IN NANOCRYSTALLINE MATERIALS AT ION BOMBARDMENT
A.I. Kalinichenko, S.S. Perepelkin, V.E. Strel'nitskij
Full Text : (400 kB, Rus.)
In model of subsurface nonlocal thermoelastic peak (TEP), thermoactivation of kinetic processes in nanocrystalline material at irradiation by ions with energy from 25 up to 1000 eV is explored.
It is shown, that ion TEP parameters (i.e., radius, the effective lifetime, temperature and pressure) and also number of thermoactivated transitions in the peak essentially depend on the crystal
grain size d. On examples of peaks of ions B+ and Al+, generated, accordingly, in nanocrystalline targets BN and AlN, energy dependence of the mentioned parameters for nanomaterials with
the various sizes of crystal grains is explored. The quantitative and qualitative distinctions in predictions of the offered model and the Seitz-Kochler's model of point thermal peak are discussed.
KEY WORDS: nanocrystalline material, ion implantation, thermal peak, kinetic process.
APPLICATION OF PHOTON ACTIVATION METHOD TO THE INVESTIGATION OF AGE TREND IN ELEMENT CONTENT OF CHILD’S HEAR
I.I. Zalyubovsky, N.P. Dikiy, E.P. Medvedeva, I.D. Fedorets, T.V. Frolova, S.P. Shklyar
Full Text : (530 kB, Rus.)
Results of the application of photon activation method to the determination of element content in child's hear depending on age, sex and some somatic diseases are presented. The hair samples by weight about 1g each of have been collected from 205 pupils (95 male and 110 female, age range 9-16 y) from one of the suburban schools and were irradiated by the
bremsstrahlung using the 700 mA, 25 MeV electron beam from the high-power electron accelerator. The detection limit was ranged from 10-5 % mass (for Ca and Pb) to 10-7 % mass (for I). Within the present context, serious consideration has been paid to studies of the analytical scope of this method. It has been shown that with suitable development of experimental techniques, photon activation method can be applied with advantage not only for analysis of biological materials but also and for revealing and research of prepatological conditions of biological systems.
KEY WORDS: photon activation method, element analysis, bremsstrahlung, hair samples, detection limit.
THE ELECTRON BEAM LINES FROM SALO RECIRCULATOR TO PHYSICAL INSTALLATION
A.N. Dovbnya, V.B. Ganenko, I.S. Guk, S.G. Kononenko, A.S. Tarasenko
Full Text : (340 kB, Rus.)
The arrangement of designing physical installations, which will use the beams of SALO recirculator - the base facility of INF&HE NSC KIPT, is shown. The requirements to parameters of beam extracted into experimental setups, which follow from the offered research program, are formulated. Magneto-optical structures of particle extraction channels, which provide
required parameters of the beam on physical targets, are chosen. The calculated for these channels the beam envelopes are resulted and influence of inaccuracy of the beam input into the beam lines on its deviation from ideal trajectory is investigated.
KEY WORDS: recirculator, electron accelerator, magnet, quadrupole, corrector.
METHODS OF CHARGE TRANSPORT PARAMETER DETERMINATION FOR CdTe (CdZnTe) GAMMA-RADIATION DETECTORS
A.A. Zakharchenko, V.E. Kutny, D.V. Nakonechny, I.M. Prokhoretz, A.V. Rybka, M.A. Khazhmuradov
Full Text : (490 kB, Rus.)
A comparative analysis of the methods intended to determine the charge transfer parameters (μτ)e and (μτ)h in active media of spectrometry and dosimetry high-resistivity semiconductor detectors is presented. A problem is studied how to determine these parameters in planar CdTe (CdZnTe) gamma-ray detectors using their experimental dosimetry characteristics and the results of computer gamma-spectra simulation. A technique is developed allowing to find out transport parameters of the tested detectors with the use of the measurement of the charge collection efficiency in low-energy spectral range (e.g., with 59.54 keV 241Am peak), measurement of the detector response in high-energy range (e.g., with line 661.67 keV 137Cs peak) and comparing these data with the results of simulation. The proposed method can be applied to the development of new spectrometric and dosimetry radiation safety devices and to the operative testing of such devices working in high-intensity radiation fields.
KEY WORDS: CdTe, CdZnTe, detector, gamma-radiation, mobility, life time, charge collection efficiency, Monte-Carlo method.
LOW-BACKGROUND SPECTROMETER ALPHA-ACTIVITY OF DIFFERENT LARGE SAMPLES
Yu.M. Gavriljuk, A.M. Gangapshev,V.V. Kazalov, V.V. Kuzminov, S.I. Panasenko, S.S. Ratkevich, I.D. Fedorets
Full Text : (800 kB, Rus.)
The construction of an ion pulse ionization chamber aimed at measuring levels of surface alpha-activity of different samples is described. Created on a basis the ionization chamber the low-background spectrometer together with corresponding methods of registration and processing of signals allows to achieve high sensitivity of direct measurements of midget levels of
superficial alpha-activity. Allows to solve a problem of the control of superpure materials, with the broken balance in a circuit of disintegrations of the uranium and thorium decay chains used at creation of detectors for research of rare nuclear processes. The results of modeling of pulses of a current are with depending on orientation and site of tracks of alpha-particles
in the chamber are given. The results of measurement carried out with alpha-source, and also with copper samples, stainless steel and light-reflecting film VM2000 are presented.
KEY WORDS: alpha-particle, track, structure, pulse ionization chamber, form of a pulse, modeling, superficial alpha-activity.
EFFECTS OF LIGHT SCATTERING IN THE PLASTIC SCINTILLATOR
N.P. Khlapova, J.S. Shpilevoy, V.G. Senchishin, A.P. Gavrik, N.S. Lutsay, V.N. Lebedev
Full Text : (390 kB, Rus.)
The experiments were fulfilled on a series of PS samples differing by regime of polymerization process. The computational analysis of optical losses in the plastic scintillator on a
polystyrene basis of standard mixture (98,5%PST + 1,5% p-TP + 0.02% POPOP) was carried out. The results of measurement of spectral scattering, bulk attenuation length and the
level of internal strains in the PS samples are presented.The possibility of quantitative estimation of contribution of absorptive losses - Raylegh scattering and Love-Mie scattering to the
summary optical losses of PS was shown .The observed drastic reduction of Relay component of losses (from 1850 to 380 dB/km) in the samples with "excess" annealing may be explained
by decrease of local heterogeneity of polymer matrix of the present PS samples, due to the decrease of internal "frozen" macromolecular deformations in them.
KEY WORDS: plastic scintillator, transparency, modelling of spectral losses, light scattering, internal strains, high-temperature annealing.
VACUUM ARC PLASMA PARAMETERS AND THE FEATURES OF TiN COATING DEPOSITION PROCESS FOR SMALL DIMENSION SAMPLES
V.M. Khoroshikh, S.A. Leonov, V.A. Belous, G.I. Nosov, G.N. Kurilenko
Full Text : (400 kB, Rus.)
Probe investigations of vacuum arc plasma parameters for the discharge with titanic cathode at presence of nitrogen in the vacuum chamber volume were provided. The features of coating deposition process for small dimension samples are studied (of order sheath thickness on border plasma - condensation surface). Investigations showed that with gas pressure growth in a discharge ambient there is plasma concentration multiplying, conditioned the decreasing of metal ions energy at collisions with the gas particles. The collisions of metal ions with the gas molecules result to plasma chaotization. The decreasing of ions energy and plasma stream chaotization leads to high coating deposition rate of titanium nitride films for small dimension samples
at nitrogen pressure ~ 1,5...2 Pa. At nitrogen of pressures ~ 1, 5...2 Pa it is necessary to take into account samples mutual influencing on each other.
KEY WORDS: vacuum arc, coating deposition, probe investigations, substrate geometry, plasma flux, plasma concentration, ion energy.