The Journal of Kharkov National University, Vol. 746,
Physical series "NUCLEI, PARTICLES, FIELDS", Issue 4/32/, 2006
| V.N. Voyevodin, I.M. Neklyudov
Problems of radiation stability structural materials in nuclear power (Rus.)
Wavelet analysis of small energy-released events in ionization detectors (Rus.)
| A.A. Shishkin, A.Yu. Antufyev, S. Morimoto, B. Weyssow
Control of Electron and Ion Entrapping/Detrapping in Helical Magnetic Field with Use of AC Field Effect
| A.A. Veryovkin, N.G. Stervoedov, G.P. Kovtun
Production and medical application of short-lived and ultra-short-lived radioisotopes (Rus.)
| E.V. Rybachuk
Asymptotic properties of currents for high-spin boson interaction with two spinless particles in consistent model (Rus.)
| V.À Voronko, V.V. Sotnikov, V.V Sidorenko, I.V. Zhuk, A.S. Potapenko, M.I. Krivopustov, S.R. Hashemi-Nezhad, P.S. Kizim
Neutron-physical characteristics of the uranium-lead assembly exposed to relativistic deuterons (Rus.)
| V.M. Azhazha, G.P. Kovtun, A.P. Shcherban’, O.A. Datzenko, D.A. Solopikhin
Calculation of the limiting distribution coefficients of admixtures in zirconium and hafnium (Rus.)
| V.V. Bobkov, S.P. Gokov, V.V. Gritsyna, D.E. Narushevich, À.L. Ulybkin, D.I. Shevtshenko
Ion-photon emission of organic systems (Rus.)
| N.P. Dikiy, D.V. Medvedev, I.N. Onishchenko, S.S. Pushkarev
Nuclear physical diagnostics of protons in the collective accelerator of ions (Rus.)
| V.P. Demutsky, Î.Ì. Pignasty, V.D. Khodusov, Ì.N. Àzàrånêîvà
Aimed function of manufacturing system with mass product output (Rus.)
PRODUCTION AND MEDICAL APPLICATION OF SHORT-LIVED AND ULTRA-SHORT-LIVED RADIOISOTOPES
A.A. Veryovkin, N.G. Stervoedov, G.P. Kovtun
Full Text : (510 kB, Rus.)
In this paper production methods and medical application of short-lived and ultra-short-lived radioisotopes are reviewed, radioisotope classification is given. Perspectives of photonuclear
methods for isotope preparation on charged particle accelerators are noted. Specifications on target design and isotopic purity of target material are given. Data on isotopes (initial isotope, radioisotope impurity, mode of production, a half-life period, decay energy, radiopharmaceutical, field of use) commonly used in medicine, are listed. The main methods of radionuclide diagnostics are reviewed.
KEY WORDS: isotopes, production methods, nuclear medicine, radionuclide diagnostics.
NEUTRON-PHYSICAL CHARACTERISTICS OF THE URANIUM-LEAD ASSEMBLY EXPOSED TO RELATIVISTIC DEUTERONS
V.À Voronko, V.V. Sotnikov, V.V Sidorenko, I.V. Zhuk, A.S. Potapenko, M.I. Krivopustov, S.R. Hashemi-Nezhad, P.S. Kizim
Full Text : (460 kB, Rus.)
Results are reported from the studies on the processes of neutron generation in the uranium-lead assembly with four sections of uranium blanket exposed to 2.52 GeV relativistic deuterons. The experiment described in this communication is a part of the scientific program „Investigations of physical aspects of the electronuclear method of power production and
transmutation of atomic-industry radioactive waste using relativistic beams from the JINR (Dubna) Synchrophasotron/Nuclotron" included in the project „Energy plus Transmutation". The combined track-γ-spectrometric technique that provides information from one and the same sample was used to measure radial and axial distributions of fission rates, the reactions of radiative capture of 238U, and also the spectral index in the volumes of the target and blanket of the U/Pb assembly. Besides, the mentioned technique makes it possible to determine the production of 239Pu in the blanket of the U/Pb assembly. Comparison was made between the experimental data and the calculations performed with the use of the computer code MCNPX 2.5 e. Good agreement between the measurements and the calculations of spectral indices in the U/Pb assembly blanket testifies that the calculation model provides a correct description of the particle transport in the blanket substance.
KEY WORDS: electronuclear method, relativistic deuterons, neutron generation, uranium-lead assembly.
CALCULATION OF THE LIMITING DISTRIBUTION COEFFICIENTS OF ADMIXTURES IN ZIRCONIUM AND HAFNIUM
V.M. Azhazha, G.P. Kovtun, A.P. Shcherban’, O.A. Datzenko, D.A. Solopikhin
Full Text : (300 kB, Rus.)
In the present work the results of accounts the limiting distribution coefficients ê0 limB of separate impurities in zirconium and hafnium are presented. The calculations are carried out using the method mathematical analysis of liquidus and solidus curves of diagram states and graphical method of extrapolation these curves at zero concentration. It is shown coincidence of values ê0 limB determined by these settlement methods. The received data on values the limiting distribution coefficients of researched impurities in Zr and Hf are expanded a circle of the systems which represent interest for estimation the efficiency of purification these metals by crystallization methods. It has been determined the temperature and concentration parameters achievement of limiting values ê0 limB considered impurities in these metals.
KEY WORDS: zirconium, hafnium, distribution coefficients, directional crystallization, diagram states, admixtures, solvency, purification.
ION-PHOTON EMISSION OF ORGANIC SYSTEMS
V.V. Bobkov, S.P. Gokov, V.V. Gritsyna, D.E. Narushevich, À.L. Ulybkin, D.I. Shevtshenko
Full Text : (250 kB, Rus.)
In this work the investigation of emission spectra observed at Ar+ ions bombardment of organic systems inclusive an organic dye eosin (EO) were done to ascertain main characteristics of photon emission: spectral composition and quantum yields of emissions, and energy distribution of sputtered excited particles .The experiments were conducted in wavelength range: 250,0¸800,0nm. Basing on the data of quantum yields of radiation emitted by excited particles, some evaluations of a number of these particles sputtered by one incident ion were done. The analysis of spatial distribution of radiation above the target surface allowed estimating effective values of kinetic energies of sputtered excited particles. On the base of obtained data some suppositions about processes going in analyzed systems were done.
KEY WORDS: ion-photon emission, organic dye, spatial distribution of radiation, yields of radiation.
NUCLEAR PHYSICAL DIAGNOSTICS OF PROTONS IN THE COLLECTIVE ACCELERATOR OF IONS
N.P. Dikiy, D.V. Medvedev, I.N. Onishchenko, S.S. Pushkarev
Full Text : (250 kB, Rus.)
The procedure of the measurement of the accelerated beam parameters in the collective ion accelerator with the use of heavy current relativistic electron beams against the large
background of electromagnetic interferences is developed. The accelerated hydrogen ions were registered with the aid of the nuclear reaction 11Â(ð,α1)8Âå by means of the detection of alpha particles. The intensification of the etching of the alpha particles tracks and an improvement of the "signal/background" relation was provide at the expense to the additives of methanol, hypochlorite and UV radiation. The use of reactions 14N(p,γ)15O, 19F(p,αγ)16O, 9Âe(ð,α)6Li for studying the energy distribution of the accelerated protons is analyzed.
KEY WORDS: collective accelerator, ion beam, nuclear reactions, track detector.