Subject Categories for JINR Publications


2014
E6-2014-1 (304.756)
Zvara I.
Vacuum Thermochromatography: Physical Principles and Monte Carlo Simulation

The title method for preparative separation of infinitesimal amounts of relatively volatile elements or compounds with different adsorbability is based on the molecular flow in an evacuated open column with imposed temperature gradient. The analytes put into the column's closed "hot" end begin to migrate owing to random flights of their molecules between two consecutive collisions with the wall. Each strike results in adsorption of the entity on the surface for a random time whose mean increases "downstream"; as a result, various analytes come to practical rest in individual temperature ranges. Here, the microscopic picture of the molecular histories is described in quantitative details, assuming that the velocity vectors of the desorbing molecules obey the cosine law angular distribution. The probability density functions for the full and projected flight lengths in long cylinders are derived. They were used in Monte Carlo simulation of great many migration histories to obtain the peaking profiles of the deposits. Numerous particular sets of experimental regimes and conditions were simulated to elucidate influence of these variables on the profiles and the characteristic deposition temperatures.

P15-2014-2 (1.771.534)
Didyk A.Yu., Winiewski R.
Synthesis of Microparticles in Molecular Hydrogen at 1 kbar Pressure in Nuclear Reactions Induced by Braking -Rays of 10 MeV Threshold Energy. The Chemical Composition and Structures at the Inner Surfaces of the Pressure Chamber Components

A high-pressure chamber filled with molecular hydrogen at 1 kbar was exposed to braking -rays produced by 10 MeV electron beam of 20-21 A intensity during 14 h. Post-irradiation investigations of the structure and elemental composition of the irregularities at the surface, as well as of two largest synthesized particles among the ones registered after the irradiation, established the presence of light elements from carbon to calcium. Besides, multiple lead particles of small size were found and studied. The detected synthesized particles have a complex shape and composition. At the both sides of the inner surfaces of the cut brass sleeve, thin-walled microtubes and other objects of complex shape were found. The observed anomalies are discussed based on the models of the fusion of hydrogen nuclei and heavier nuclei (upstream reactions) and fission reactions (downstream reactions) and fusion reactions (upstream reactions) of nuclei in the chamber walls.

P15-2014-3 (6.053.115)
Didyk A.Yu., Winiewski R.
Synthesis of Microparticles in Molecular Hydrogen at 1 kbar Pressure in Nuclear Reactions Induced by Braking -Rays of 10 MeV Threshold Energy. The Chemical Composition of the Synthesized Particles and Structures at the Surface of the Reaction Chamber

A chamber filled with molecular hydrogen at 1 kbar pressure was exposed to braking -rays with a threshold energy of 10 MeV produced by an electron beam of 20-21 A intensity during 14 h. The studies of the changes in the structure and element composition of the entrance window, manganin foil, and collector of reaction products are presented in paper [1]. This paper provides a discussion of the results of a study of the synthesized particles and different formations at the inner surfaces of the cut-in-half irradiation chamber (brass sleeve). The studies of the two largest synthesized structures observed after irradiation established the presence of light elements from carbon to calcium. As in [1], multiple lead particles of small size were observed and studied. The detected synthesized particles have a complex shape and composition. At both sides of the inner surfaces of the cut brass sleeve, thin-walled microtubes were observed, as in [1]. The new elements and structures are discussed on the basis of the upstream (fusion) and downstream (fission) models of nuclear reactions (see [1]).

005_2014_JINR_2013_Report_RAS (290.525)

P15-2014-6 (1.666.041)
Didyk A.Yu., Winiewski R.
Synthesis of New Structures on the Surface of a Pd-Rod and HHPC Elements and Their Chemical Composition under Nuclear Reactions Induced by Braking -Rays with a Threshold Energy of 10 MeV in Molecular Hydrogen at 0.5 kbar Pressure

A high-pressure chamber filled with molecular hydrogen (HHPC) at 0.5 kbar pressure, with a Pd-rod inside, was exposed during 14 hours to braking -rays with a threshold energy of 10 MeV produced by an electron beam of 20-21 A intensity. The studies of the changes in the structure and element composition of the Pd-rod and irregularities of all the internal surfaces of the HHPC elements, as well as large synthetic structures detected after irradiation, established the presence in them of light elements from carbon to calcium. Besides that, multiple small-sized particles of lead were also found and studied. The detected synthesized particle has a complex shape and composition. Also, thin-walled micro tubes were registered on the inner surfaces inside the HHPC. An attempt is made to explain the observed anomalies based on fission reactions of intermediate mass (downstream reactions) and reactions of fusion of elements from hydrogen and heavier nuclei (upstream reactions).

P15-2014-7 (987.080)
Didyk A.Yu., Winiewski R.
Chemical Composition and Structure of the Synthesized Particles on the Surface HHPC by Nuclear Reactions during Irradiation Brake -Rays with a Threshold Energy of 10 MeV in Molecular Hydrogen at 0.5 kbar Pressure

A chamber filled with molecular hydrogen at 0.5 kbar pressure (HHPC) with Pd-rod inside was exposed to braking -rays with a threshold energy of 10 MeV produced by an electron beam of 20-21 A intensity during 14 hours. The studies of the changes in the structure and element composition of the synthesized particles and other objects on the surface of the brass sleeve, an HHPC component, which were detected after irradiation, established the presence in them of light elements from carbon to calcium. Besides that, multiple small-sized particles of lead were also found and studied. The registered synthesized particles have a complex shape and composition. At the inner surfaces of the HHPC thin-walled microtubes were found. An attempt is made to explain the observed anomalies basing on fission reactions of intermediate mass (downstream reactions) and reactions of fusion of elements from hydrogen and heavier nuclei (upstream reactions).

E9-2014-8 (804.616)
Smirnov V.L., Vorozhtsov S.B., Vincent J.
H- Superconducting Cyclotron for PET Isotope Production

The scientific design of a 14-MeV H- compact superconducting cyclotron for producing of the 18F and 13N isotopes has been developed. Main requirements to the facility as a medical accelerator are met in the design. In particular, the main requirement for the cyclotron was the smallest possible size due to the superconducting magnet. The calculations show that the proposed cyclotron allows extracted beam intensity over 500 A. To increase system reliability and production rates, an external H- ion source is applied. The choice of the cyclotron concept, design of the structure elements, calculation of the electromagnetic fields and beam dynamics from the ion source to the extraction system were performed.

E18-2014-11 (445.640)
Nekhoroshkov P.S. et al.
Neutron Activation Analysis and Scanning Electron Microscopy of Phytoplankton in the Coastal Zone of the rimea (Black Sea)

For the first time the concentrations of 45 elements in the coastal phytoplankton communities used as bioindicator of inorganic contamination of the Black Sea coastal area near Sevastopol, Ukraine, were determined by means of neutron activation analysis and scanning electron microscopy with energy dispersive spectrometer. Phytoplankton samples were collected by total tows of the plankton net with 35 m pore size at 3 stations situated in polluted and relatively pristine water areas of the Sevastopol coastal zone during autumn period of the phytoplankton active growth. The concentration of Mg, Al, Sc, Ti, V, Mn, As, Rb, Ba, Th and Fe, Cr increases exponentially from relatively pristine station to more polluted station and 10 and 3 times greater, respectively, in the phytoplankton of the Sevastopol Bay. The rare-earth elements have relatively the same concentration values of about 1 g/g and tend to accumulate in the phytoplankton from the polluted station in the Sevastopol Bay. The obtained results are in good agreement with the elemental concentration data in the oceanic plankton, plankton communities from the White Sea and the Black Sea. Using energy-dispersive X-ray spectrometry the mineral particles of unknown origin and impurities of copper (0.42% by weight) in the phytoplankton at the polluted station and zinc (0.57% by weight) at the relatively pristine station were determined.

P13-2014-14 (329.619)
Pepelyshev Yu.N., Popov A.K., Sumkhuu D.
Model Dynamics of the IBR-2M Pulsed Reactor for Study of Transient Processes in a Wide Range Change of Power

The variant is the model dynamics of the IBR-2M pulsed reactor for modeling of a wide range at changes of reactivity and power. Consider nonlinearities of control rods and transfer coefficients of energy and amplitude of pulse power. Acceptability of the model is confirmed by comparing the modeled processes with registered at reset emergency protection when the controlled parameter (relative amplitude of the pulse power) decreases almost by five orders. Modeling is carried out at different levels of mean power (0.2-2 MW). With a decrease in the relative amplitude of the power pulse approximately by the first four orders a good approximation of the modeled processes is registered. At further decreasing of the amplitude a certain difference is observed. However, at such low power levels, this difference is insignificant.

E1-2014-18 (714.370)
Budagov J. et al. (on behalf of the CDF Collaboration)
Top-Quark Mass Measurement in the -Dilepton Channel Using the Full CDF Run II Data Set

We present a measurement of the top-quark mass with -dilepton events using the full CDF Run II data set, which corresponds to an integrated luminosity of 9.1 fb-1 collected from = 1.96 TeV collisions at the Fermilab Tevatron. A sample of 520 events is obtained after all selection requirements. The top-quark mass is estimated by a fit of the distribution of some variable to a sum of signal and background contributions. This variable is defined using special approach to reduce the systematic error due to the jet energy scale uncertainty. Templates are built from simulated and background events, and parameterized in order to provide probability distribution functions. A likelihood fit of the data returns the top-quark mass of (170.80 1.83 (stat.) 2.69 (syst.)) GeV/c2 (or (170.80 3.25) GeV/c2).

P11-2014-19 (319.299)
Lakhno V.D. et al.
Polaron Model of the Hydrated Electron States Formation

Formation of the photoexcited electron states in water is numerically analysed in the framework of the dynamic polaron model. Results of numerical simulation are discussed in comparison with experimental data and theoretical estimations.

P13-2014-20 (646.268)
Kononenko G.A. et al
Detection System of the COMBAS Fragment Separator

The results of design and testing of multi-detector telescope (E1, E2, E) are given. The compact telescope consists of 32-strip Si E-detectors and CsI/Tl E-scintillation detectors of high granularity (nine modules) and allows one to obtain timing signal from Si detectors for TOF measurements. The single channel and 32-channel charge-sensitive preamplifiers were developed and manufactured to serve the Si E-detectors and CsI/Tl scintillation E-detectors with high efficiency and sensitivity. Unambiguous A and Z identification of reaction products, produced in the 40Ar (35 MeV/nucleon) + 9 reaction system, is implemented.

E13-2014-21 (2.406.944)
Batusov V. et al.
Recent Advances and Perspectives of the High Precision Laser Metrology

The laser-based metrology presents new means and opens possibilities in solving tasks where achievement of a high precision survey is of the principal significance necessity. The extended laser fiducial line (coordinate axis) is necessary for precision alignment of basic structure units of large-scale accelerators, for precision assembly of subdetectors when mounting large spectrometric complexes, for online control of space stability of particle detectors during the data taking period. The high sensitivity laser inclinometers open the new possibilities for ground motion control and for accelerator (collider) beam space stabilization essential for achievement of stable high intensity (luminosity) at the interaction area.

P13-2014-22 (209.207)
Drozdziel A. et al.
Spectrometer for Studying Thermal Desorption of Ar+ Ions from Silicon Samples

The paper describes the design of the thermal desorption spectrometer. The primary results of the study of thermal desorption phenomena using this facility are also given. The object of the research was the Ar+ implanted silicon samples. Implantation energy Ei varied in the range 85-175 keV. The measurements were carried out at an annealing temperature of ~ 930 and implantation fluence of 5 1016 cm-2. Analyzing the TDS spectra collected for different heating ramp rates enabled estimation of the desorption activation energy (2 eV for Ei = 85 keV and 1.7 eV for Ei = 115 keV).

P13-2014-23 (201.746)
Hrubn L. et al.
Characteristics of Silicon Carbide Detectors

The main characteristics of the detectors fabricated on the basis of high-purity epitaxial layers of 4H-SiC-polytype are presented. It is shown that the SiC-detectors have good spectrometric characteristics at -particle and X-ray registration.

P13-2014-25 (720.114)
Butler A. et al.
Measurement of the Energy Resolution and Calibration of Hybrid Pixel Detectors with GaAs:Cr Sensor and Timepix Readout Chip

This paper describes an iterative method of per-pixel energy calibration of hybrid pixel detectors with GaAs:Cr sensor and Timepix readout chip. A convolution of precisely measured spectra of characteristic X-rays of different metals with the resolution and the efficiency of the pixel detector is used for the calibration. The energy resolution of the detector is also measured during the calibration. The use of per-pixel calibration allows one to achieve a good energy resolution of the Timepix detector with GaAs:Cr sensor: ~ 8% and ~ 13% at 60 keV and 20 keV, respectively.

P17-2014-30 (1.961.495)
Rahmonov I.R., Shukrinov Yu.M., Irie A.
Parametric Resonance in the System of Long Josephson Junctions

Based on the investigations of phase dynamics of long Josephson junction system with length larger than the Josephson penetration depth, we show the possibility of appearance of longitudinal plasma wave and realization of parametric resonance. Calculations are performed taking into account both inductive and capacitive coupling between the Josephson junctions. Current-voltage characteristics, spatiotemporal dependence of electrical charge in the superconducting layers and magnetic field in all the Josephson junctions of the system have been calculated. In the parametric resonance region starting from a certain length of Josephson junctions we observe the coexistence of longitudinal plasma waves and fluxon states.

P13-2014-31 (781.006)
Ananiev V.D. et al.
Physical Start-Up of the IBR-2M Reactor. Core Fuel Loading

The results of the work on core fuel loading and bringing the IBR-2M reactor to critical state, carried out by the JINR FLNP researchers in accordance with the Program of physical start-up of the modernized IBR-2 reactor, are presented. Core fuel loading of IBR-2M was begun on 17 December 2010 and completed on 14 February 2011.

P13-2014-33 (530.304)
Ignatovich V.K. et al.
Automation of Experiments in the Field of Neutron Spectrometry Using Network Technologies

Standardized means of description of experimental procedures and of control of the operations sequence, which do not require editing experiment control system components, when experimental procedure is changed, are proposed.

P3-2014-34 (165.427)
iselev .. et al.
Investigation of Structure of the Unilamellar DMPC Vesicles in the Sucrose Solutions by the Small Angle Neutron and X-ray Scattering

The structure of polydispersed population of the unilamellar DMPC vesicles in sucrose solutions has been investigated by the small angle neutron scattering (SANS) and X-ray scattering (SAXS). Calculations in frames of the separated form factors model (SFF) show that the structure of the vesicle system essentially depends on the sucrose concentration.

E2-2014-35 (599.892)
Tokarev M.V., Zborovsk I., Aparin A.A.
Fractal Structure of Hadrons in Processes with Polarized Protons at SPD NICA (Proposal for Experiment)

The concept of z-scaling previously developed for analysis of inclusive reactions in proton-proton collisions is applied for description of processes with polarized protons at the planned Spin Physics Detector NICA in Dubna. A hypothesis of self-similarity and fractality of the proton spin structure is discussed. The possibilities to extract information on spin-dependent fractal dimensions of hadrons and fragmentation process from asymmetries and coefficients of polarization transfer are justified. The double longitudinal spin asymmetry ALL of 0-meson production and the coefficient of the polarization transfer DLL of hyperon production in proton-proton collisions measured at RHIC are analyzed in the framework of z-scaling. The spin-dependent fractal dimensions of proton and fragmentation process with polarized hyperon are estimated. A study of the spin-dependent constituent energy loss as a function of transverse momentum of the inclusive hadron and collision energy is suggested.

P13-2014-36 (1.059.954)
Pepelyshev Yu.N., Tsogtsaikhan Ts.
Cluster Analysis for Investigation of the Dynamics of Pulse Energy Noise at the IBR-2M Reactor

The results of study of the dynamics of the noise component of IBR-2M using cluster analysis methods are presented. It is shown that spectral density changes of pulse energy fluctuations after the reactor nominal power 2 MW have a transition region of duration ~ 3 days. During the operation of the reactor the noise structure is divided into four stable structures, three of them describing the noise transition region. The fourth stable structure is independent of the reactor's noise level and operation time. The noise transition region is caused by the vibration of moving reflectors in the process of heating after increasing of the reactor power.

E13-2014-37 (465.546)
Pavlov S.S. et al.
Automation System for Measurement of Gamma-Ray Spectra of Induced Activity for Multi-Element High-Volume Neutron Activation Analysis at the IBR-2 Reactor of FLNP at JINR

The automation system for measurement of induced activity of gamma-ray spectra for multi-element high-volume neutron activation analysis (NAA) was designed, developed and implemented at the IBR-2 reactor. The system consists of three devices of automatic sample changers for three Canberra HPGe detector-based gamma spectrometry systems. Each sample changer consists of two-axis linear positioning module M202A by DriveSet (DriveSet.de) company and disk with 45 slots for containers with samples. Control of automatic sample changer is performed by the Xemo S360U controller by Systec (systec.de) company. Positioning accuracy can reach 0.1 mm. Special software performs automatic changing of samples and measurement of gamma spectra at constant interaction with the NAA database. The system is unique and can be recommended for other laboratories as one of the possible ways of the NAA integrated automation.

P15-2014-38 (844.833)
Didyk A.Yu., Winiewski R.
Properties of Carbon-Based Structures Synthesized in Nuclear Reactions under Braking -Quanta Irradiation with 10 MeV Threshold Energy at 1.1 kbar Helium Gas Pressure

The helium gas at 1.1 kbar initial pressure inside a helium high-pressure chamber (HeHPC) was irradiated by braking -quanta with 10 MeV threshold energy during 1.0 105 s at the electron beam current 22-24 A. The helium gas pressure before opening of the HeHPC was found to be 426 bar. The synthesized black foils and other objects were observed inside the HeHPC and on the inner surfaces of the reactive chamber consisting of high purity copper (99.99), a beryllium bronze entrance window and a copper collector of chemical and nuclear reaction products. Elemental analysis using scanning electronic microscopy (SEM) and microprobe roentgen analysis (MPRA) allowed one to establish that the observed foils consist predominantly of carbon and with smaller quantities of other elements from carbon to iron. The explanation of the observed phenomena and anomalies is given on the basis of helium fusion nuclear reactions by analogy with nuclear reactions taking place in stars. The developed approach agrees well with the series of studies carried out by authors at -quanta influence on dense hydrogen and deuterium gases with or without presence of metals in the reactive chamber.

E19-2014-39 (703.666)
Belov O.V. et al.
A Quantitative Model of the Major Pathways for Radiation-Induced DNA Double-Strand Break Repair

We have developed a model approach to simulate the major pathways of DNA double-strand break (DSB) repair in mammalian and human cells. The proposed model shows a possible mechanistic explanation of the basic regularities of DSB processing through the nonhomologous end-joining (NHEJ), homologous recombination (HR), and single-strand annealing (SSA). It reconstructs the time-courses of radiation-induced foci specific to particular repair processes including the major intermediate stages. The model is validated for ionizing radiations of a wide range of linear energy transfer (0.2-236 keV/m) including a relatively broad spectrum of heavy ions. The appropriate set of reaction rate constants was suggested to satisfy the kinetics of DSB rejoining for the considered types of exposure. The simultaneous assessment of three repair pathways allows one to describe their possible biological relations in response to radiation. With the help of the proposed approach, we reproduce several experimental data sets on -H2AX foci remaining in different types of cells including those defective in NHEJ, HR, or SSA functions.

P14-2014-41 (303.860)
Savin V.V., Semin V.A., Semina V.K.
Formation and Stability of the E93-Type Phases in Ni-Nb Alloy System Studied by X-Ray and Neutron Diffraction

By analyzing phase states formed in the Ni60-30Nb40-70 alloys under rapid melt quenching conditions and metal glasses crystallization, some researchers have revealed formation of two isotypic E93-type phases, denoted as ' and '', which exhibit different lattice parameters: (1.120 0.001) nm (') and (1.164 0.002) nm (''). To refine structures of these phases and to clarify their formation reasons in course of non-equilibrium crystallization of undercooled melt and amorphous alloy, we used X-ray and neutron diffraction methods as well as crystallochemical criteria from the theory of formation and stability for intermediate phases and metal glasses in transition metal systems. It was experimentally shown that the ' and '' phases belong to different structural types, namely Fe6W6C and Ti2Ni, respectively. Formation of these phases is correlated with respective crystallochemical parameters: the size factor and electron concentration.

P13-2014-44 (226.422)
Marachev A.A. et al.
Reactivity Meter of the Pulsed Reactor of Periodic Operation IBR-2M

A reactivity meter of the pulsed reactor of periodic operation of the IBR-2 type is created. Kinetics of the reactor is described by difference equations relating the reactor parameters corresponding to the current and preceding pulse power and the nonlinear dependence of energy of the pulse and its amplitude on the reactivity. It was taken into consideration that a controllable parameter of the reactor is the relative deviation of power pulse amplitude from its base (given mean) value. In the study of transient processes for suppressing significant reactivity noise inherent in the design and principle of operation of the reactor, a statistically optimal filter is used. The best place to include the filter in a block diagram of the reactivity meter is chosen and the optimal value of the smoothing coefficient is determined.

P5-2014-45 (864.036)
Dikusar N.D.
Polynomial Approximation of the High Orders

The new approach is proposed to the high orders polynomial approximation (smoothing), based on the basic elements method (BEM). The nth-degree BEM-polynomial is expressed in the form of four basic elements, given at a three-point grid x0 + < x0 < x0 + , < 0. Formulae of calculation coefficients of the 12th order polynomial model depending on length of an interval, continuous parameters , and values of derivatives f(m)(x0 + ), = ,,0, m = are received. Application of the BEM-polynomial of high degrees for piecewise polynomial approximations (PWA) and smoothing increases stability and accuracy of calculations at growth of a step of a grid, and downturns computing complexity as well.

P3-2014-46 (1.073.026)
Balagurov A.M. et al.
Neutron Scattering for Lithium-Ion Batteries: Analysis of Materials and Processes

The use of neutron scattering to study the structure of materials used in portable power sources (mainly lithium-ion batteries) and to examine the structural changes of these materials during the electrochemical processes is reviewed. We consider the applications of several basic techniques: diffraction, small angle and inelastic neutron scattering, neutron reflectometry and neutron imaging. The experimental facilities that already exist in advanced neutron sources and a series of representative experiments are reviewed. The results of some studies of lithium-containing materials and lithium-ion batteries performed at the IBR-2 pulsed research reactor at the Joint Institute for Nuclear Research (Dubna) are presented.

E19-2014-48 (957.645)
Batmunkh M. et al.
Simulation of Energy Deposition from 125I and 213Bi Decays in the Cell Nucleus

We modeled the radioactive decays of 125I and 213Bi radionuclides inside the spherical volume simulating a cell nucleus. Using the Monte-Carlo-based track structure simulation technique, we estimated the radial distribution of deposited energy and the kinetic energy spectra of electrons produced by primary particles resulting from decay. To address the possibility of DNA damage, we performed the cluster analysis of track structures of emitted particles inside the volumes corresponding to the diameter of the native double-stranded DNA. For this purpose, G4-RadioactiveDecay and G4-DNA program packages form the Geant4 Monte Carlo toolkit were combined together.

P15-2014-50 (9.128.840)
Didyk A.Yu., Winiewski R.
Nuclear Reactions, Synthesis of Chemical Elements and Novel Structures in Dense Helium at 1.1 kbar Pressure under the Action of Braking -rays with 10 MeV Threshold Energy

A helium high pressure chamber (HeHPC) filled with helium gas at 1.1 kbar initial pressure was irradiated by braking -rays with 10 MeV threshold energy during 1.0 105 s at the electron beam current 21-24 A. The helium gas pressure before opening of the HeHPC was found to be 426 bar. The synthesized black color foils and other objects were observed inside the HeHPC and on the inner surfaces of the reaction chamber from high purity copper (99.99%), beryllium bronze entrance window and copper collector of chemical and nuclear reaction products. An element analysis using scanning electron microscopy (SEM) and microprobe Roentgen analysis (MPRA) permitted us to establish that the observed foils consist predominantly of carbon with smaller quantities of other elements from carbon to iron. The explanation of the observed phenomena and anomalies is introduced on the basis of helium fusion nuclear reactions by analogy with nuclear reactions taking place in stars in astrophysics. The developed approach agrees well with the series of studies carried out by the authors on the influence of -rays on dense hydrogen and deuterium gases in the presence or absence of metals in the reaction chamber.

P10-2014-53 (356.330)
Morkovnikow I.A.
Configuration Files Processing in Sonix+

The work is dedicated to configuration files processing in software package Sonix+. The work contains a list of software data processing drawbacks and their solutions. The structure of configuration files was formalized and the model providing editing of configurations files was developed during the work. The document contains logic of functions related with data processing and description of additional functions for developers.

E2-2014-54 (104.982)
Beshtoev Kh.M.
Violation of CP Invariance for Neutral K0, D0, B0d, B0s Mesons and Quarks in Weak Interactions

CP violation in the Kobayashi-Maskawa matrix was introduced by using phase which is the same for the three families of quarks. However, analysis of CP violation of mesons has shown that new small-angle mixings appear besides of CP phases. This work is devoted to the consideration of possible schemes for introducing CP violation. It is noted that in general case it is not correct to use CP phase only for the first and third quark families as it is usually introduced. CP phase has to be presented for all quark families, and moreover these phases cannot be the same for all families. Besides, a common case of CP violation was considered for K0, D0, B0d, B0s mesons, where mixing angles and phases are present at CP violation. Expressions for transition probabilities for these processes are given. In conclusion, mixing of d, s, b quarks at CP violation was considered with taking into account their angle mixings and phases.

E18-2014-57 (131.546)
Karamian S.A., Dmitriev S.N.
Prospects for the Methods of Radionuclide Production

Methods of radionuclide production for the nuclear-medicine purposes are described. In a budget approach, the application of low-energy accelerators is especially advantageous. Intense flux of bremsstrahlung at electron accelerators or high-current cyclotron beams of alpha particles must supply a great yield for many isotopes. The choice of a target material and of the projectile energy provides enough variation for concrete species formation. The innovating procedures are here proposed for optimizing of methods, for instance, application of the noble-gas target for production and transport of activities. The known and new variants of the generator scheme are discussed. Many isotopes are listed as promising in the context of the therapeutic and theragnostic applications. Among them are isotopes/isomers emitting soft radiation for the selective and careful body treatment, also the positron emitters for PET, and the halogen and alkali-metal species convenient for chemical separation.

P15-2014-58 (227.196)
Karamian S.A. et al.
Production of Isotopes and Isomers with Irradiation of Z = 47-50 Targets by 23 MeV Bremsstrahlung

The irradiations of Ag to Sn targets by bremsstrahlung generated with 23 MeV electron beams are performed at the MT-25 microtron. Gamma spectra of the induced activities have been measured and the yields of all detected radio-nuclides and isomers are carefully measured and analyzed. A regular dependence of yields versus changed reaction threshold is confirmed. Many isomers are detected and the suppression of the production-probability is observed with growing product spin. Special peculiarities for the isomer-to-ground state ratios were deduced for the 106mAg, 108mAg, 113mIn, 115mIn, and 123mSn isomers. The production of such nuclides as 108mAg, 115mIn, 117m,gIn, and 113mCd is of interest for applications, especially when economic methods are available.

P3-2014-59 (127.761)
Aksenov V.L. et al.
Reflectometric Investigations in Connection with Neutron Wave Packet Representation

A preliminary experiment on neutron reflection from a glass plate with wave vectors lower than the critical one is described. The data have been analyzed by neutron wave packet representation. The limiting value of neutron transmission through the glass plate for the neutron wave packet representation is defined as (3.0 1.0) 10-5.

P14-2014-60 (336.117)
Nikitenko Yu.V. et al.
Detection of Magnetic Nanolattice in Structure Ta/V/Fe0.7V0.3/V/Fe0.7V0.3/Nb/Si with Magnetic and Superconducting Layers

Formation of magnetic lattice in structure Ta/V/Fe0.7V0.3/V/Fe0.7V0.3/Nb/Si with magnetic and superconducting layers at low temperatures 1.3-10 K is observed. It definitely points to the realization of the crypto-ferromagnetic state at the ferromagnetic-superconductor interface.

P13-2014-61 (538.023)
Pepelyshev Yu.N., Tsogtsaikhan Ts.
The Noise Effects of Liquid Sodium Coolant System of IBR-2M on Reactivity Fluctuation

In this paper we consider the thermal dynamics vibration parameters of the primary circuit of the sodium cooling system of IBR-2M reactor at an average power of 2 MW and sodium flow through the core of 100 m3/h. The data on the statistics of the contour fluctuations, their relationship and assessment of the impact of noise on the circuit noise reactivity and power stabilization system are obtained. The full variation of parameters of the primary circuit of the sodium cooling system is sufficiently large, up to 6-8%. In the fluctuation of the power spectral density of the first circuit parameters, total reactivity and power feedback reactivity, the frequency of daily fluctuations is prevalent, with a significant contribution of the weekly noise components. The automatic regulator (AR) in the reactor feedback loop may undergo a substantial per night vibrational displacement of 66 mm with additional weekly movements of 46 mm. Given the trend of reactivity compensation by the system of automatic power stabilization, full daily fluctuations of AR reach 100 mm, which completely covers the linear region of power control. The total reactivity fluctuations for the reactor cycle are 14.0 10-2ef and cause movement of AR by 310 mm. Argon pressure fluctuations in the core (~ 8%) and sodium levels (4.5 cm) give a zero isobaric effect and do not affect the power fluctuations. The slow fluctuation of the parameters of the first coolant circuit in the core make a sufficiently strong influence on the reactivity, operation of the power stabilization system, and safety of the reactor.

E2-2014-63 (194.729)
Beshtoev Kh.M.
About Absence of Oscillations at CP Violation and Presence of Interference between KS-, KL-Meson States in the System of K0 Mesons

Two approaches to the description of K0-, -meson transitions into K01 mesons at CP violation in weak interactions are considered. The first approach uses the standard theory of oscillations and the second approach supposes that (KS, KL) states which arise at CP violation are normalized but not orthogonal state functions, then there arise interferences between these states but not oscillations. It is necessary to remark that the available experimental data are in good agreement with the second approach. So, we come to the conclusion that oscillations do not arise at CP violation in weak interactions in the system of K0 mesons. Only interference between KS and KL states takes place here.

E2-2014-66 (334.388)
Shirkov D.V.
Remarks on Simple Modified Perturbation Theory

The goal is to devise a pQCD modification that should be regular in the low-energy region and could serve practically for the data analysis below 1 GeV up to the IR limit. The recently observed "blow-up" of the 4-loop pQCD series for the Bjorken SR form factor around Q 1 GeV and partial resolving of the issue with the help of the Analytic Perturbation Theory (APT) until Q ~ 0.6 GeV provided the impetus for this attempt.

The "massive pQCD" under construction has two grounds. The first is pQCD with only one parameter added, an effective "glueball mass" m Mglb 1 GeV, serving as an IR regulator. Roughly, we introduce it by changing the UV ln Q2 for a massive log, ln (Q2 + Mglb), regular in the LE region and finite in the IR limit. The second stems from the ghost-free APT comprising non-power perturbative expansion that makes it compatible with linear integral transformations.


E13-2014-68 (572.898)
Volkov A.D.
Measurement of Tube Tension in Straw Detectors

A device and a method for controlling tension of tubes in straw detectors are presented. The method is based on measuring the resonance frequency of a tube at electrostatic excitation of its oscillations relative to the reference electrode. The sensitivity of the device allows the resonance frequency to be detected with an accuracy of 0.1 Hz. The tension is determined using analytical dependence obtained by the author. The relative error of the experimental data against the analytical dependence is below 3%. The device proved to be effective in a range of tensions from 250 to 1200 g/m used in development of the detectors, and it can be employed for measuring tension of wires.

E2-2014-70 (160.115)
Namsrai Kh.
Nonlocal Quantum Electrodynamics

It is shown that an origin of the divergence problem in quantum electrodynamics is associated with a singularity of classical electrostatic field. A modification of its Coulomb potential at small distances leads to the change of the photon propagator which allows us to construct finite and gauge-invariant quantum electrodynamics. We establish restriction on the value of the so-called fundamental length l 1016 cm from the experimental data on the measuring anomalous magnetic moment of leptons. It is well known that any modification of the spinor propagator (in particular, electron one) gives rise to many problems connected with verification of basic principles of the theory like gauge invariance, unitarity, causality condition and so on. However, it turns out that square-root modification of the spinor propagator is free from these difficult problems. Here we also construct a finite square-root quantum electrodynamics.

P3-2014-72 (377.820)
Kulin G.V. et al.
Time-of-Flight Fourier Spectrometry of UCN

The results of preliminary experiments on TOF Fourier UCN spectrometry are presented. The description of the new Fourier spectrometer that may be used for the measurement of the UCN spectra arising from diffraction by a moving grating is given. The results of preliminary experiments and Monte Carlo calculations give reason to hope for the success of the planned experiment.

E2-2014-73 (375.482)
Tokarev M.V., Zborovsk I., Aparin A.A.
Self-Similarity of Hard Cumulative Processes in Fixed Target Experiment for BES-II at STAR

Search for signatures of phase transition in Au + Au collisions is in the heart of the heavy ion program at RHIC. Systematic study of particle production over a wide range of collision energy revealed new phenomena such as the nuclear suppression effect expressed by nuclear modification factor, the constituent quark number scaling for elliptic flow, the "ridge effect" in - fluctuations, etc. To determine the phase boundaries and location of the critical point of nuclear matter, the Beam Energy Scan (BES-I) program at RHIC has been suggested and performed by STAR and PHENIX Collaborations. The obtained results have shown that the program (BES-II) should be continued. In this paper a proposal to use hard cumulative processes in BES Phase-II program is outlined. Selection of the cumulative events is assumed to enrich data sample by a new type of collisions characterized by higher energy density and more compressed matter. This would allow finding clearer signatures of phase transition, location of a critical point and studying extreme conditions in heavy ion collisions.

P19-2014-76 (170.814)
Komochkov M.M.
Low Dose Dependence of the Biological Effects of Ionizing Radiation in Different Representations

The essence of the biological effects of low doses of ionizing radiation is still unclear, which determines the decree character of the linear no-threshold model underlying the ICRP recommendations. In our opinion, one of the main causes of this ambiguity is the absence of necessary and sufficient information on the radiosensitivity of the main elements of biological objects. Different models fit results of experiments and observations with a different degree of reliability and themselves evaluate radiosensitivity based on the best agreement between the calculated and measured data. The best fitting results are produced by the model of two protective reactions.

P3-2014-77 (81.636)
Vasiliev B.V.
Is the Neutron an Elementary Particle?

The question is whether or not the neutron an elementary particle was considered in the first years after its discovery. There was not any experimental data which could help to solve this problem at the time. At the moment it is assumed that the neutron is an elementary particle and that it is composed of quarks. However, this approach does not allow one to calculate the specific properties of the neutron. The current experimental information on the properties of the neutron indicates that it is not an elementary particle. If we assume that the neutron is a composite particle, then we can calculate the magnetic moment of the neutron and the energy of its decay.

E2-2014-78 (282.502)
Tokarev M.V., Zborovsk I.
Self-Similarity of Proton Spin and Asymmetry of Jet Production

Self-similarity of jet production in polarized p + p collisions is studied. The concept of z-scaling is applied for description of inclusive spectra obtained with different orientations of proton spin. New data on the double longitudinal spin asymmetry, ALL, of jets produced in proton-proton collisions at = 200 GeV measured by the STAR Collaboration at RHIC are analyzed in the z-scaling approach. Hypotheses of self-similarity and fractality of internal spin structure are formulated. A possibility to extract information on spin-dependent fractal dimensions of proton from the asymmetry of jet production is justified. The spin-dependent fractal dimensions for the process + jet + X are estimated.

E14-2014-80 (400.990)
Uyanga E. et al.
The Structural Study of Alternative Support Materials for PEMFC

Mesoporous niobium-doped titanium oxide (NTO) was synthesized and investigated as a cathode catalyst support material for polymer electrolyte membrane fuel cells (PEMFC). We prepared the NTO support by two different methods: 1) room-temperature synthesis of NbxTi1-xO2 (x = 0.1, 0.005) via surfactant templating and 2) high-temperature synthesis (700 and 1000 °C) of NbxTi1xO2 (x = 0.1). The XRD analysis revealed only the presence of anatase and rutile TiO2 phase in the synthesized support powder. The existence of any peaks belonging to Nb compounds was not observed, indicating that Nb is incorporated in the lattice. The X-ray diffraction and Raman scattering measurements revealed anatase-to-rutile phase transition hindering due to Nb doping. Pt nanoparticles were dispersed in the mesoporous NTO support by the polyol method and characterized by the scanning electron microscopy. The Pt particle sizes, interatomic distances, and distribution were found by XRD, XAS, and SEM. To better understand the role played by the dopant atoms in inhibiting both phase transformation to rutile and grain growth, XAS measurements were performed at the Nb K and Ti K absorption edges. The XAS analysis results indicate that niobium atoms are incorporated into nanostructured TiO2 with +5 valence state.
E15-2014-85 (526.459)
Testov D. et al.
The 3He Long-Counter TETRA at the ALTO ISOL Facility

A new -decay station (BEDO) has been installed after the PARRNe mass-separator operated online to the electron-driven ALTO ISOL facility. The station is equipped with a movable tape collector allowing the creation of the radioactive sources of interest at the very center of a modular detection system and their cyclical evacuation outside of it. The mechanical structure was designed to host various assemblies of detectors in compact geometry. We report here the first online use of this system equipped by the 3He neutron counter TETRA built at JINR, Dubna, associated with the HPGe and plastic 4-beta detectors. The single neutron detection efficiency achieved is (53 2)% measured using 252Cf source. The online commissioning of the TETRA was performed with a laser-ionized Ga beams. and neutron events were recorded as a function of time. From this data we report Pn(82Ga) = (22.2 2)% and T1/2(82Ga) = 0.604(11) s in good agreement with values available in the literature. We also report Pn(83Ga) = (84.8 3.6)% measured by simultaneous , neutron counting, which confirms that 83Ga is much stronger neutron emitter than considered before.

P15-2014-87 (1.051.858)
Didyk A.Yu., Winiewski R.
Synthesis of New Structures and Formation of Chemical Elements in Dense Helium at a Pressure of 3.05 kbar under Irradiation of Braking -Rays with a Threshold Energy of 10 MeV

The high-pressure helium chamber (HeHPC) filled with helium gas under a pressure of about 3.05 kbar was irradiated by braking -rays of 10 MeV threshold energy for 1.0 105 s at an electron beam current of 18-21 A. During the irradiation of the HeHPC, the pressure decreased by 65 bar. Inside the chamber, multiple objects were found at the internal surfaces of the reaction chamber, input window from beryllium bronze and copper collector of nuclear and chemical reaction products. The element analysis made by using scanning electron microscopy (SEM) and X-ray microprobe analysis (XMPA) revealed that the objects mainly consist of carbon and smaller amounts of other elements from carbon to iron. An explanation of the observed elements and anomalies based on nuclear fusion reactions of helium under the action of -rays is proposed by analogy with the reactions taking place in stars in astrophysics.

P15-2014-88 (4.069.756)
Didyk A.Yu., Winiewski R.
Nuclear Reactions with Synthesis of Structures in HHPC with Hydrogen at a Pressure of 3.5 kbar and a Tin Rod under Irradiation of Braking -Rays with a Threshold Energy of 10 MeV

The high-pressure chamber (HHPC) filled with hydrogen under a pressure of about 3.5~kbar was irradiated by braking -rays of 10~MeV threshold energy. Upon opening the HHPC, a large number of synthesized microparticles detached from the reaction chamber walls and spilled out. Detailed studies of the element composition and structure of all microobjects detected at the internal surfaces of the HHPC components and tin rod were conducted. As a result of irradiation of the HHPC by braking -rays, nuclear reactions took place with the formation of the light elements from carbon to medium-mass metals, as well as heavier ones, such as barium. Possible upward (with synthesis of elements from lighter ones) and downstream (with fission of heavier nuclei into lighter elements) nuclear reactions are discussed.

P15-2014-89 (487.678)
Didyk A.Yu., Winiewski R.
Nuclear Reactions with Synthesis of Microparticles in Hydrogen at a Pressure of 3.5 kbar in the Presence of Tin under Irradiation by Braking -Quanta with a Threshold Energy of 10 MeV

A rod of pure (99.98%) tin that was placed in a hydrogen high-pressure chamber (HHPC) at a pressure of 3.5 kbar was irradiated with braking -rays of 10 MeV threshold energy. Upon opening the HHPC, a large number of synthesized microparticles were detached from the reaction chamber walls and spilled out. Detailed studies of the element composition and structure of microparticles and all the internal surfaces of the HHPC components, including the tin rod, have been carried out. It is found that the microparticles can be divided into three parts: banded, loose and compact. As a result of nuclear reactions under the irradiation by braking -rays, nuclear reactions took place with the formation of light elements from carbon to medium-mass metals, as well as heavier ones, such as barium. Possible upward (with synthesis of elements from lighter ones) and downstream (with fission of heavier nuclei into lighter elements) nuclear reactions are discussed.

P19-2014-91 (540.167)
Dushanov E.B., Kholmurodov Kh.T., Koltovaya N.A.
Computer Modeling of Mutant P32T Homo- and Heterodimers of Human Inosine Triphosphate Pyrophosphatase hITPA

The structure of the dimer enzyme human inosine triphosphate pyrophosphatase (hITPA) is considered to identify the enzyme conformation changes causing the inactivation effect of the P32T mutation. A nanosecond molecular dynamics (MD) analysis is performed; mean square deviations are calculated of the structures of the wild-type and mutant homodimers and the heterodimer. A 3 ns modeling shows a greater displacement of atoms in mutant protomers. During MD modeling, the strongest changes are observed in the loop between 2 and 2 (res. 28-33), which includes P32T, the loop between 5 and 6, and the C-terminal amino acid residues. The loop between 2 and 2 has two conformations characterized by different positions of the Phe31 aromatic group. The distance between Cys33 (C) and Phe31 (Cz) for wild-type and mutant protomers was ~ 9 and 5.5 , respectively. These conformations were stable.

E3-2014-92 (1.102.868)
Adam J. et al.
Measurement of the High-Energy Neutron Flux on the Surface of the Natural Uranium Target Assembly QUINTA Irradiated by Deuterons of 4- and 8-GeV Energy

Experiments with a natural uranium target assembly QUINTA exposed to 4- and 8 GeV deuteron beams of the Nuclotron accelerator at the Joint Institute for Nuclear Research (Dubna) are analyzed. The 129I, 232Th, 233U, 235U, natU, 237Np, 238Pu, 239Pu and 241Am radioactive samples were installed on the surface of the QUINTA set-up and irradiated with secondary neutrons. The neutron flux through the RA samples was monitored by Al foils. The reaction rates of 27Al(n,y1)24Na, 27Al(n,y2)22Na and 27Al(n,y2)7Be reactions with the effective threshold energies of 5, 27 and 119 MeV were measured at both 4- and 8-GeV deuteron beam energies. The average neutron fluxes between the effective threshold energies and the effective ends of the neutron spectra (which are 800 or 1000 MeV for energy of 4- or 8-GeV deuterons) were determined. The evidence for the intensity shift of the neutron spectra to higher neutron energies with the increase of the deuteron energy from 4 to 8 GeV was found from the ratios of the average neutron fluxes. The reaction rates and the average neutron fluxes were calculated with MCNPX2.7 and MARS15 codes.

E2-2014-93 (141.103)
Pestov I.B.
Symmetry and Quantum Effects of Extra Dimension of Space

It is supposed that the physical space has extra dimension. Possible effects of this innovation are investigated on the example of the simplest mathematical space - the four-dimensional Euclidian space. It is demonstrated that the origin and the nature of a rotational motion are clearly visible in four dimensions only. A pair of the Dirac equations associated with the natural tetrads on the four-dimensional Euclidian space is considered. Comparing these equations with the original Dirac equation in the Minkowski space-time, we show that there are two causal structures on the four-dimensional Euclidian space. With this, the rational proof of the existence of leptons and quarks, lepton-quark symmetry and confinement is obtained. To illustrate some questions connected with the so-called hidden symmetry and hidden dimensions, natural mappings of the four-dimensional Euclidian space onto the three-dimensional one are considered.

P3-2014-94 (518.598)
Zlokazov V.B. et al.
Visualization and Analysis of Neutron Diffraction Real-Time Data

For the preliminary analysis and final mathematical processing of large neutron diffraction data arrays, obtained in studies of transitions processes in crystals, necessary software has been created. It contains the program for visualization of 2D data, obtained at a TOF-diffractometer with time of flight scanning, and the program package, which enables analysis of the atomic structure changes during the transition process in an automatic mode. Results of the analysis are temporal dependences of the structural crystal characteristics of crystal phases, which can be presented as dependences on outer impact. If needed the package enables the analysis of data, measured at a constant wavelength diffractometer with scanning along scattering angle.

P1-2014-95 (197.254)
Avramenko S.A. et al.
Fast Search Method for Initial Approximation of Straight Tracks of the Wire and Strip Detectors

For detectors with sensitive elements in the form of straight line segments, i.e. for wire detectors, drift tubes, silicon strip detectors, etc., there is a task to find straight tracks for triggered items (tracking). Due to the large number of tracks as well as elements of the detectors in modern experiments, the number of combinations of selected sensitive elements can be very large. It turns out that if the number of sensitive elements of the detector is chosen equal to four, then under some conditions there is a straight line which strictly crosses all the selected four elements (four overlapping straight lines). The proposed "method of four straight lines" can be used, in particular, for rapid determination of initial approximation and/or selection of items which belong to a straight track. The method has been successfully used at the facility HADES, GSI.

P4-2014-96 (122.519)
Severyukhin A.P., Sushenok E.O.
Influence of the Complex Configurations on the Description of -Decay Properties of 132Sn

We give a microscopic description of Gamow-Teller (GT) transitions in the case of -decay of neutron-rich nucleus 132Sn. Starting from the Skyrme force, the model takes into account the coupling between one- and two-phonon components of wave function. The separable approximation allows us to perform the calculations in very large configuration spaces. It is shown that the increase of the strength of the neutron-proton tensor interaction leads to the increment of GT transition energy. Also, there is the reduction of the -decay half-life of 132Sn.

E13-2014-97 (284.487)
Azaryan N. et al.
The Precision Laser Inclinometer Long-Term Measurement in Thermo-Stabilized Conditions (First Experimental Data)

The Precision Laser Inclinometer was tested at thermo-stabilized conditions, and the ground angular stability of 1 rad (observation during 24 h) and 7 nrad (observation during 60 min) was measured.

P10-2014-101 (54.836)
Morkovnikov I.A., Kashunin I.A., Sukhomlinov G.A.
Organization of Data Transfer from Sonix+ to the File Server Nfserv-b

The work is dedicated to data storage creation and file transfer automation from control computer to the file server. The work contains a list of data storage hardware and software, a description of the file system organization and data security.

E10-2014-103 (2.523.051)
Akishina E.P. et al.
Conceptual Considerations for CBM Databases

We consider a concept of databases for the CBM experiment. For this purpose, an analysis of the databases for large experiments at the LHC at CERN has been performed. Special features of various DBMS utilized in physical experiments, including relational and object-oriented DBMS as the most applicable ones for the tasks of these experiments, were analyzed. A set of databases for the CBM experiment, DBMS for their developments as well as use cases for the considered databases are suggested.

P15-2014-104 (421.271)
Didyk A.Yu. et al.
Synthesis of Microparticles in Dense Hydrogen at a Pressure of 3.5 kbar with a Tin Rod under Irradiation with Braking -Rays of a Threshold Energy of 10~MeV

A rod of pure (99.98%) tin was placed in a hydrogen high-pressure chamber (HHPC) at a pressure of 3.5 kbar was irradiated with braking -rays of 10 MeV threshold energy. Upon opening the HHPC, a large number of synthesized microparticles detached from the reaction chamber walls and spilled out. Detailed studies of the element composition and structure of microparticles and all the internal surfaces of the HHPC components, including the tin rod, have been carried out. It is found that the microparticles can be divided into three types: banded, loose and compact. As a result of irradiation of the HHPC with the braking -rays, nuclear reactions took place with the formation of light elements from carbon to medium-mass metals, as well as heavier ones, such as barium. Possible upward (with synthesis of elements from lighter ones) and downstream (with fission of heavier nuclei into lighter elements) nuclear reactions are discussed.



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