CONTENTS

                                                            № 3 (16), 2005

 

 

I. NUCLEAR  PHYSICS

 

1. Elastic and inelastic scattering of 7Li + 11B

ААRudchik, АТRudchik, A. Budzanowski, L. Głowacka,

K. W. Kemper,  S. Kliczewski, E. ІKoshchy, G. M. Kozeratska,

S. Yu. Mezhevych, ОАPonkratenko, КRusek, R. Siudak,

ІSkwirszyńska, J. Choiński, B. Czech, T. Czosnyka, АSzczurek

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

3. Semiclassical analysis of fragmentation of 18О-nucleus оn 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

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

5. Study of fast neutron scattering mechanism by vanadium nuclei

I. O. Korzh,  M. T. Sklyar

6. Average resonance parameters of 110,112,116Cd isotopes

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

7. Model of the non-commutative operators of coordinates and momenta

of different particles

M. V. Kuzmenko

 

II. NUCLEAR  POWER

 

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

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

 

III. PLASMA  PHYSICS

 

9. Extended symmetries of the kinetic plasma theory models

V. B. Taranov

 

IV. RADIOECOLOGY  AND  RADIOBIOLOGY

 

10. Radioecological situation in “critical” settlements of

north-eastern Pollisia of Ukraine and ways of its improvement

S. V. Polishchuk, V. O. Kashparov

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

12. Research of radioactive contamination of RBMK-reactor graphite

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

M. V. Zheltonozhskaya, A. I. Lipskaya

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

14. Content of radionuclides in the water of Kanev reservoir after accident

on ChNPP in 1986

О. L. Zarubin, V. V. Kanivets

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 

16. Distance interaction effects of irradiated and non-irradiated plants

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

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

18. Oxidative modification of protein in the rats’ liver by the action of X-ray

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

19. Temporal dynamics of cytogenetic anomalies in blood cells of cattle under

radioactive pollution

N. A. Kobozeva, T. T. Glazko

20. Problems of small rodent use for radioactive pollution bioindication

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

 

V. ENGINEERING  AND  METHODS  OF  EXPERIMENT

 

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

 

1. ELASTIC  AND  INELASTIC  SCATTERING  OF  7Li + 11B

 

ААRudchik,  АТRudchik,  A. Budzanowski,  L. Głowacka,  K. W. Kemper,  S. Kliczewski,
E. 
ІKoshchy,  G. M. Kozeratska,  S. Yu. Mezhevych,  ОАPonkratenko,  КRusek,  R. Siudak,
ІSkwirszyńska,  J. Choiński,  B. Czech,  T. Czosnyka,  АSzczurek

 

            Angular distributions of the 7Li + 11B elastic and inelastic scattering were measured at Elab (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 Elab(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, 8,10-15B, 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, , , S1,1/2, S1,3/2 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 sel and 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, 3rd - 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.