А. А. Rudchik, А. Т. Rudchik, A. Budzanowski, L. Głowacka, K. W. Kemper, S. Kliczewski,
E. І. Koshchy, G. M. Kozeratska, S. Yu. Mezhevych, О. А. Ponkratenko, К. Rusek, R. Siudak,
І. Skwirszyńska, J. Choiński, B. Czech, T. Czosnyka, А. Szczurek

Angular distributions of the ⁷Li + ¹¹B elastic and inelastic scattering were measured at E_lab (¹¹B) = 44 MeV for the transitions to the ground and excited states of ⁷Li and ¹¹B. These data and those known from literature only at E_lab(⁷Li) = 34 MeV were analyzed within the optical model and coupled-reaction-channels method. The elastic and inelastic scattering, reorientations of ⁷Li and ¹¹B in ground and excited states as well as the prominent one- and two-step transfers were included in the channels-coupling-scheme. The ⁷Li + ¹¹В optical potential parameters for ground and excited states of ⁷Li and ¹¹B as well as deformation parameters of these nuclei were deduced. The energy dependence of ⁷Li^(*) + ¹¹B^(*) optical potential parameters was studied.

2. THE NUMERICAL SOLUTION OF FADDEEV’S EQUATIONS AND THE CALCULATION OF ND - SCATTERING CROSS SECTION IN FUNDAMENTAL K-HARMONIC APPROXIMATION

V. K. Tartakovsky, V. I. Kovalchuk, I. V. Kozlovsky

We have considered the problem of neuteron-deuteron scattering at low energies. Representing solution of corresponding Faddeev’s equations as sum of asymptotic wave function and rapidly convergencing series of hyperspherical harmonics, we have calculated basic term of this series with value of full moment K = 0. The angular distribution of cross section for nd-scattering at 3,28 MeV neutron energy has been computed and compared with the experiment.

3. SEMICLASSICAL ANALYSIS OF FRAGMENTATION OF ¹⁸O-NUCLEUS ON THE ¹⁸¹Ta AND ⁹Be TARGETS AT 35 MeV/u

V. P. Aleshin, A. G. Artukh, B. Erdemchimeg, G. Kaminski, S. A. Klygin,

Yu. M. Sereda, Yu. G. Teterev, A. N. Vorontsov

In the framework of the classical-trajectory method, we analyse zero-angle yields and velocity distributions for the products of fragmentation of ¹⁸O-nucleus with Z > 2 on the ¹⁸¹Ta and ⁹Be targets at the energy 35 MeV/u. The analysis is based on the hypothesis of a two-step mechanism of which the first step is stripping of few nucleons from the projectile during its motion through the target and the second step is fragmentation of the projectile residue when it already left the target. The stripping probability of a nucleon is related with the imaginary part of the nucleon-target optical potential, while fragmentation is described within the Fermi statistical breakup model. The calculations reproduce the general trends of 0⁰ yields of ^13-17O, ^12-17N, ^{9-16C, 8,10-15}B, ^7,9-12,14Be, and ^6-9,11Li nuclei, which implies that the two-step mechanism of fragmentation prevails. However, the inability of our calculations to reproduce the complex shape of the velocity spectra indicates that also the prompt disintegration of projectile within the target nucleus contributes to 0° yields.

4. Isomeric ratios from gamma quantum energy dependence for ¹⁹⁷Pt and ¹⁹⁷Hg isotones received in (g, n)-reactions

V. A. Zheltonozhsky, V. M. Mazur, Z. M. Bigan, D. M. Symochko

Within 8 - 17 МеV energy range the dependence of isomer yield ratios on gamma-quanta energy in the ¹⁹⁸Pt(g, n)^197mPt and ¹⁹⁸Hg(g, n)^197mHg reactions have been studied. The experimental results are compared with those calculated within framework of cascade-evaporation model as well as obtained under the influence of the particles.

5. Study of fast neutron scattering mechanism by vanadium nuclei

I. O. Korzh, M. T. Sklyar

Applicability of the optical-statistical approach variant based on the spherical optical model, method of the coupled channels, model of the exited core and modern variants of statistical model for the description of experimental total cross sections, elastic and inelastic scattering of neutrons by vanadium nuclei in energy range 0,2 - 20 МeV is investigated for the first time. The results of the theoretical analysis are used for research of fast neutron scattering mechanisms by vanadium nuclei.

6. AVERAGE RESONANCE PARAMETERS OF ^110,112,116Cd ISOTOPES

M. M. Pravdivy, I. O. Korzh, M. T. Sklyar

The average resonance parameters S₀, S₁, , , S_1,1/2, S_1,3/2 of the isotopes ^110,112,116Cd were determined from the experimental differential neutron elastic scattering cross sections with the help of the method, developed by the authors within the framework of optical model. The parameters are found by fitting of the theoretical expressions, obtained by the authors for s_eland for coefficients Legendre polynomial expansion of differential elastic cross sections ω₁, ω₂, to their experimental values in the energy range 1 - 450 keV. The analysis of the obtained average resonance parameters is carried out.

7. model of the non-commutative operators of coordinates and momenta of different particles

M. V. Kuzmenko

It is shown that the Schrödinger equation for a system of interacting particles whose Compton wavelengths are of the same order of magnitude as the system size has contradictions and is not strictly non-relativistic, because it is based on the implicit assumption that the velocity of propagation of interactions is finite. In the framework of the model of the non-commutative operators of coordinates and momenta of different particles, the equation for wave function which has no above-mentioned drawbacks is deduced. The significant differences from solutions of the non-relativistic Schrödinger equation for large values of the interaction constant are found and the comparison of analogous results for hydrogenlike atoms with experimental data is carried out.

8. ex-vessel dosimetry measurement equipment for WWER-1000 reactor

V. N. Bukanov, E. G. Vasylyeva, V. L. Dyemokhin, A. M. Pugach

The detailed description and the background of the construction of the special equipment used in the WWER-1000 pressure vessel radiation exposure determination technique for placement of neutron-activation detectors at the outer surface are given. The detector high coordinate determination technique is presented.

9. EXTENDED SYMMETRIES OF THE KINETIC PLASMA THEORY MODELS

V. B. Taranov

Symmetry extension of the kinetic theory of collisionless plasma containing particles with equal charge to mass ratio is considered. It is shown that this symmetry allows us to reduce the number of equations. Symmetries obtained for the integro-differential equations of the kinetic theory by the indirect algorithm are compared to those obtained by direct methods. The importance of additional conditions – positiveness and integrability of distribution functions, existence of their moments - is underlined.

10. RADIOECOLOGICAL SITUATION IN “CRITICAL” SETTLEMENTS OF NORTH-EASTERN POLLISIA OF UKRAINE AND WAYS OF ITS IMPROVEMENT

S. V. Polishchuk, V. O. Kashparov

From radiological point of view the scientists consider modern radioecological situation with levels of pollution of agricultural production. As an example it is taken critical settlement in Rovno region. Basic components of internal radiation dose are determined among the population and also the researchers consider that one of possible ways of radiological situation improvement in critical settlements is radical improvement of natural fodder land.

11. RESEARCH OF RADIONUCLIDE MIGRATION INSIDE 30-KILOMETERS

CHORNOBYL EXCLUSION ZONE

M. D. Bondarkov, S. P. Goshchak, M. V. Zheltonozhskaya, A. I. Lipskaya, L. V. Sadovnikov

The investigation of migration of Chornobyl origin radionuclides was carried out in soil profiles of the Glubukoe lake within 5 km ChNPP zone. The soil samples were taken along four experimental trenches in 2002. g- and b-emanations of these samples were investigated after the corresponding processing. ^134,137Cs, ^154,155Eu, ²⁴¹Am isotopes were identified very well. ⁹⁰Sr isotopes were identified as a result of research of the thin layers b-spectra. ^238+239Pu isotopes were determined using nondestructive control methods. The migration of ^134,137Cs, ^154,155Eu, ⁹⁰Sr, ²⁴¹Am and the ^238+239Pu isotopes was observed to the depth of 30 cm. The obtained data is analyzing.

12. Research of radioactive contamination of RBMK-reactor graphite

M. D. Bondarkov, I. N. Vishnevsky, V. A. Zheltonozhsky, M. V. Zheltonozhskaya, A. I. Lipskaya

For the first time integrated b-spectrometric and radiometric investigations, g- and X-ray spectrometry of GRP-2-125 graphite from ChNPP Unit 2 were carried out. An analysis of obtained data has shown that it is necessary to carry out the comparison with experimental and calculated results of graphite activity research only on the basis of radioactive nuclide ¹⁴C from irradiated reactor graphite. Nuclides ³Н and ³⁶Cl distributed uniformly among the samples. The others nuclides distributed inhomogeneous. Inhomogeneous distribution was detected for ⁶⁰Со, ⁹⁰Sr and ¹³⁷Cs only in one sample. Presence of ¹³⁷Cs and ^154,155Eu indicated a contamination of fissions products. Activity of irradiated GRP-2-125 graphite was defined of ¹⁴С content as well as of content of radioactive nuclides of impurity and technological origin (³Н, ³⁶Cl, ⁵⁵Fe, ⁶⁰Co, ⁶³Ni, ^93mNb, ⁹⁴Nb, ¹³³Ba, ¹³⁴Cs) and fuel fission products (⁹⁰Sr, ¹³⁷Cs, ¹⁵⁴Eu, ¹⁵⁵Eu).

13. ¹³⁷Cs CONTENT IN MUSHROOMS ON TESTING AREA “KOPACHI” (5-KILOMETERS ZONE OF ChNPP)

N. E. Zarubina, E. V. Svarichevskaya, I. A. Malyuk, S. V. Teletskaya,

L. A. Golovach, A. I. Golovach

The researches which have been carried out in the period of 1999 - 2004, have shown that the polygon “Коpachi” has some distinctive features. The increase of values of exposure dose was marked. The content of ¹³⁷Cs in the top layer of soil has increased for the period of researches. The ratio of specific activity of ¹³⁷Cs in mushrooms with different levels of localization of mycelium corresponds to the first years after accident. The assumption was made that the peculiarities of this testing area are connected to supplemental entry of ¹³⁷Cs in soil as the result of “Nuclear Waste-2 Depository” building.

14. CONTENT OF RADIONUCLIDES IN THE WATER OF KANEV RESERVOIR AFTER ACCIDENT ON ChNPP IN 1986

О. L. Zarubin, V. V. Kanivets

The content of radionuclides in the water of Kanevskoe reservoir of river Dnepr was studied from 1986 till 2003. In 1986 15 gamma-emitting radionuclides are registered with the maximal total activity on May, 3^rd - 6 kBq/l. The primary radionuclides’ pollution of the water area of Kanev reservoir have occurred through 4 - 6 days after accident on ChNPP and it was formed by aerosol losses on the water area of Kanev reservoir. Through 10 - 20 days after accident on ChNPP radionuclides have started to arrive to Kanev reservoir with water from northern territories of columbine. ¹³⁷Cs and ⁹⁰Sr determined radioactivity of the water since 1987. Their content, basically, was determined by accession of “dirty” water from Kiev reservoir.

15. MAIN PECULIARITIES OF ⁹⁰Sr AND ¹³⁷Cs REDISTRIBUTION IN “SOIL - PINES” SYSTEM OF THE FOREST BIOGEOCENOSE IN THE CHERNOBYL EXCLUSION ZONE

K. F. Shytyuk, V. O. Kashparov, V. P. Protsak

The scientific researches were carried out at nine experimental plots represented by the pine forests. The redistribution of radioactive nuclides of ⁹⁰Sr and ¹³⁷Cs in main components of biogeocenose was analyzed and vertical migration intensity of ⁹⁰Sr and ¹³⁷Cs was determined. Also, intensity of the radionuclides accumulation in the main forest species - pine tree in the Exclusion zone was investigated. It is identified that cumulative inventory of ⁹⁰Sr is significant for the perennial parts of wood species (first of all for - timber). The highest concentration of ⁹⁰Sr is found in the photosynthetic parts of the pine tree – needles, and the lowest concentration is found in wood. In this concern, according to the obtained results bark has an intermediate position. The same characteristics refer to ¹³⁷Cs.

16. DISTANCE INTERACTION EFFECTS OF IRRADIATED AND NON-IRRADIATED PLANTS

A. P. Kravets, G. D. Slinyavchuk, D. M. Grodsinsky, T. A. Vasilenko

Effects of remotely interactions between irradiated and non-irradiated Zea plants, which are in the condition of water culture, had been investigated using of two experimental models. Stimulation of growth’ reactions and increase chromosome aberrations outlet for non-irradiated plant had been demonstrated. Simultaneously oppression of irradiated plants, relatively irradiated homogeneous variants, had been observed.

17. STRUCTURAL STATE OF RATS SMALL INTESTINE ENTEROCYTES APICAL MEMBRANE AT IONIZING RADIATION

S. V. Hizhnyak, L. I. Stepanova, I. I. Romas, A. A. Prokhorova, V. M. Voitsitskiy

The structural state of small intestine enterocytes apical membrane at one-time action of ionizing radiation in doses 0,1, 0,4, 1,0, 2,0, 3,0 and 6,0 Gy in 24 hour is investigated. The development of small intestine pathological conditions connected with the occurrence of ultrastructure disturbance of small intestine cellular elements, which intensify with the increase of ionizing radiation dose, is detected. The ionizing radiation causes decrease of phospholipids and cholesterol quantity in 24 hour after the irradiation. The decreases of membrane microviscosity and increase of protein triptophanil fluorescence intensity is shown of ionizing radiation. The structural modifications can result in the detected rise permeability of membrane for ions, disturbance of enzymes functioning.

18. OXIDATIVE MODIFICATION OF PROTEIN IN THE RATS’ LIVER BY THE ACTION OF X-RAY

Ya. G. Ivanushko, Yu. P. Grinevich, G. M. Chobotko

We studied the 30 days long influence fractioned X-ray in total doses 0,3, 0,6, 0,9 and 1,2 Gr on the oxidative modification of protein in the rats′ liver, which was valued by the level of aldechido- and keto- derivatives of denitrofenilgirason of neutral and main character. X-ray caused the increase of protein oxidative modification as well as neutral, so the main character after the completion of X-ray at all doses on the first and the tenth days; by this fact the level of aldegido- end keto- derivatives of main character was higher. After 20 and 30 days the level of oxidative modification of protein verge to control (data verification). The higher level of protein oxidative modification has been saved till 30 days long after the completion of X-ray.

19. TEMPORAL DYNAMICS OF CYTOGENETIC ANOMALIES IN BLOOD CELLS OF CATTLE UNDER RADIOACTIVE POLLUTION

N. A. Kobozeva, T. T. Glazko

Quantitative analysis of the various cytogenetical anomalies in groups of cattle which reproduced under conditions of high level environment radioactivity is performed. Data about the nonlinear character of investigated anomalies frequency at different years and different animal generations are presented.

20. PROBLEMS OF SMALL RODENT USE FOR RADIOACTIVE POLLUTION BIOINDICATION

O. A. Kovalova, O. O. Burdo, T. T. Glazko

Comparative analysis of cytogenetic anomaly frequencies in bone marrow cells of Cletrionomys glareolus and Microtus arvalis on the background of high level of radio nuclide pollution was carried out. It was revealed that the involvement of different cytogenetic characteristics in variability is species-specific: an increase in leukocytes with micronuclei was typical for M. arvalis, but the increase in chromosome aberration was typical for C. glareolus. Increase of the number of radiation resistant animals in places with high level of radioactive pollution was observed.

21. DEVELOPMENT OF PULSE-SHAPE ANALYSIS FOR DISCRIMINATION OF LOW ENERGY SCINTILLATION SIGNALS FROM PHOTOMULTIPLIER NOISES

F. A. Danevich, S. S. Nagorny, S. S. Yurchenko

Pulse shape analysis technique for discrimination of low-energy scintillation signals from the photomultiplier noises was developed. Samples of low-energy signals, free from photomultiplier noise admixture were measured in special calibration runs. The algorithm of preliminary signal processing to determine beginning and base line of the pulses was developed. Comparison of different pulse shape discrimination methods was done. Among them are the methods of “average time”, optimal digital filter, least squares and artificial neural networks. The 100 % discrimination efficiency for CdWO₄ scintillation signals with energies of ³ 15 keV from photomultiplier noises was achieved.