Subject Categories for JINR Publications
2013
E13-2013-1 (316.063)
Voskoboinik E.I. et al.
High-Resolution Magnetic Analyzer MAVR

A project of the high-resolution magnetic analyzer MAVR is proposed. The analyzer will comprise new ion-optical and detecting systems for separation and identification of reaction products in a wide range of masses (5-150) and charges (1-60). The MULTI detecting system is being developed for the MAVR magnetic analyzer to allow detection of nuclear reaction products and their identification by charge Q, atomic number Z, and mass A with a high absolute accuracy. The identification will be performed by measuring the energy loss (E), time of flight (TOF), and total kinetic energy (TKE) of reaction products. The particle trajectories in the analyzer will also be determined using the drift chamber developed jointly with GANIL (France). The MAVR analyzer will operate in both primary beams of heavy ions and beams of radioactive nuclei produced by the U400-U400M acceleration complex. It will be also used for measuring energy spectra of nuclear reaction products and as an energy monochromator.

E15-2013-2 (205.076)
Testov D. et al.
First Delayed Neutron Emission Measurements at ALTO with the Neutron Detector TETRA

Beta-decay properties are among the easiest and, therefore, the first ones to be measured to study new neutron-rich isotopes. Eventually, a very small number of nuclei could be sufficient to estimate their lifetime and neutron emission probability. With the new radioactive beam facilities which have been commissioned recently (or will be constructed shortly) new areas of neutron-rich isotopes will become reachable. To study beta-decay properties of such nuclei at IPN (Orsay) in the framework of collaboration with JINR (Dubna), a new experimental setup including the neutron detector of high efficiency TETRA was developed and commissioned.

P13-2013-3 (303.802)
Pepelyshev Yu.N., Rogov A.D.
Neutron-Physical Calculations at the IBR-2M Reactor during Physical and Energetic Reactor Startup

The paper presents key results of neutron-physical calculations at the IBR-2M reactor necessary for physical and energetic reactor startup. A special focus was given to measurements of reactor condition and nuclear safety during the critical mass and critical level stages as well as assessment of the effectiveness of reactor control rods and reactivity modulator. Calculated assessment of reactor condition while achieving the nominal plate capacity was particularly important. The paper also provides a comparison of calculated versus experimentally measured data.

P13-2013-4 (229.902)
Pepelyshev Yu.N., Rogov A.D.
Power Startup of the IBR-2M Reactor. Fast Power Reactivity Feedback Parameters

The paper presents the study results on the fast power coefficients of feedback reactivity at the modernized IBR-2 (IBR-2M) reactor. The study was conducted based on the 2011 power reactor startup program at up to 140 MW day power production.

The paper illustrates that the reactivity coefficient of fast power reactivity feedback is negative at all levels of capacity and sodium flow rate throughout the active zone. At 2 MW capacity and sodium flow rate of 80-100 m3/h the power feedback coefficient is -0.043 0.0066, 10-2 ýô/kW.

At 0.5 to 2 MW capacity the fuel and sodium parts of the power feedback coefficient were separated. It was shown that the sodium part of the power feedback coefficient at nominal capacity of 2 MW is negligible. The fuel part of the power feedback coefficient is constant at all levels of power and equal to 0.047 0.0066, 10-2 ýô/kW.

Changes in power feedback coefficient from sodium heating in the active power zone can be characterized as threshold. Above the threshold temperature level of 40 , the power feedback coefficient decreases sharply (1.7 times). Power feedback coefficient is sufficient for consistent reactor performance at capacity of up to nominal of 2 MW.


P11-2013-5 (197.712)
Dedovich T.G., Tokarev M.V.
Comparison of Fractal Analysis Methods in the Study of Fractals with Independent Branching

Dimension as a quantitative characteristic of a space geometry is discussed. Hadrons produced in collisions of particles and nuclei are assumed to be sample of points in 3D-space (pT, , ) having properties of a fractal. Hausdorff-Besicovitch dimension is regarded as the most natural quantity to determine the fractal dimension DF. Results of comparison of the various methods as Box Counting (BC), P-adic Coverage (PaC), System of Equation of P-adic Coverage (SePaC), to determine a fractal dimension are presented. The procedure to determine the optimal values of the parameters of these methods is described. It allows us to find the fractal dimension, number of fractal levels, and fractal structure with maximal efficiency. Features of PaC and SePaC methods for analysis of fractals with independnet branching are noted.

P13-2013-6 (365.278)
Pepelyshev Yu.N., Rogov A.D.
Power Startup of the IBR-2M Reactor. Sodium Flow Rate Reactivity Feedback Parameters

The paper presents the study results on the sodium flow rate of feedback reactivity of the IBR-2M reactor. The study was conducted based on the 2011 energetic reactor startup program at up to nominal of 2 MW. All fast and asymptotic feedback effects are negative at all power levels and flow rates of sodium through the active zone. The specified parameters of the reactor allow its safe and effective functioning at a power up to 2 MW with a frequency of repetition of impulses 5 s-1.

P13-2013-7 (234.820)
Pepelyshev Yu.N., Rogov A.D.
Slow Power Reactivity Feedback Parameters of the IBR-2M Reactor

The paper presents the results of study on the slow power coefficients of feedback reactivity of the modernized IBR-2 (IBR-2M) reactor. The study was conducted based on the 2011 energy reactor startup program at up to 140 MW day power production. It is shown that slow power feedback of IBR-2M contains two components, negative (-27 10-2 eff) and positive (+35 10-2 eff), with constants of exponential change equal to -110 and +1.8 h, respectively. In comparison with IBR-2, the positive component of feedback decreased by 40%, and negative one by 10%. The time constants changed slightly (~ 10%). The main components of slow feedback in the reactor can be caused by the changes occurring in various elements surrounding the active zone, for example, in stationary reflectors, biological protection, etc. The system of automatic power control of the IBR-2M reactor by existing parameters of slow power feedback reliably provides power stabilization at the set level.

P13-2013-9 (267.441)
Pepyolyshev Yu.N., Popov A.K.
Estimation of Power Feedback Parameters of Pulse Reactor IBR-2M on Transients

Parameters of the IBR-2M reactor power feedback (PFB) on a model of the reactor dynamics by mathematical treatment of two registered transients are estimated. Frequency characteristics and the pulse transient characteristics corresponding to these PFB parameters are calculated. PFB parameters received thus can be considered as their express tentative estimation as real measurements in this case occupy no more than 30 minutes. Total PFB is negative at 1 and 2 MW. At the received estimations of PFB parameters in a self-regulation mode it is possible to consider the stability margins of the IBR-2M reactor satisfactory.

P9-2013-10 (1.105.309)
Zamriy V.N., Sumbaev A.P.
Precision Thermostabilization for LUE-200 Accelerator Section

A two-loop thermostating system for the accelerating section of the S-band electron linac has been developed. To provide the required heatsink path and an opportunity of re-changing the section while altering the acceleration mode, the temperature in the system of the thermostat and the cooling water channel in the external contour are regulated. To achieve the required precision (0.1%) and stabilization time of the temperature of the thermostat having extended waterways, the method of proportional-integral-derivative (PID) control has been applied. The programmed control allows one to adapt the system for several operating modes: the fast warming-up, operated settling of temperature and thermostabilization, change of the preset temperature of the thermostat. It provides the reduction of errors and setting time of the thermostating regime, and also minimization of power consumption of the thermostat.

P2-2013-11 (1.986.044)
Kazakov D.I.
The First Lessons of the LHC: The Higgs Boson and Supersymmetry

We discuss recent results on the Higgs boson discovery and search for supersymmetry at the LHC. Is the Higgs boson really discovered and if yes is it the Higgs boson of the Standard Model? Which properties of the discovered particle are consistent with the SM and what are the alternatives? Could it be that two Higgs bosons are discovered? What one can say about the stability of the electroweak vacuum if the Higgs boson has a mass of 125 GeV? What are the predictions of SUSY theories concerning the Higgs boson mass? Does the value of 125 GeV support SUSY or contradict it? What is the situation with SUSY searches and what is left of SUSY parameter space? Is low energy SUSY still alive? What are the perspectives of SUSY finding at the LHC at 14 TeV?

P1-2013-13 (598.993)
Piyadin S.M.
The Study of the dp ppn Reaction at the Internal Target Station at Nuclotron at Deuteron Energy of 500 MeV

The results of data processing for the study of the deutron breakup reaction at energy of 500 MeV are presented. The set-up at the Internal Target Station at Nuclotron is described, the algorithm of the useful events selection for the deuteron breakup reaction with the registration of two protons is demonstrated.

E2-2013-14 (242.449)
Kobushkin A.P., Strokovsky E.A.
Spin-Dependent Observables and the D2 Parameter in Breakup of Deuteron and 3He

We analyze the momentum distributions of constituents in 3He, as well as the spin-dependent observables for (3He, d), (3He, p), and (d, p) breakup reactions. Special attention is paid to the region of small relative momenta of the helium-3 and deuteron constituents, where a single parameter, D2, has determining role for the spin-dependent observables. We extract also this parameter for the deuteron, basing on the existing data for the tensor analyzing power of this (d, p) breakup.

P15-2013-15 (4.736.383)
Didyk A.Yu., Winiewski R., Wilczynska-Kitowska T.
Changes of Surface Structure and Elemental Composition of Pd Rod and Collector of Nuclear and Chemical Reaction Products, Irradiated with 10-MeV Quanta in Dense Deuterium Gas

A high-pressure chamber was filled with 1.2 kbar molecular deuterium (DHPC). The palladium rod saturated by deuterium was loaded inside the DHPC and irradiated with 10-MeV bremsstrahlung quanta during 18 h at 11-13 A electron beam using the MT-25 electron accelerator. The elemental compositions of all DHPC element surfaces which were inside dense deuterium gas were studied using scanning electronic microscopes with X-ray microprobe analysis. It was established that all surfaces including the surface of a high-purity palladium rod (99.995%) were covered by partly homogeneous layer or large microparticles of lead. Also, such light elements as 6C, 8O, 11Na, 12Mg, 13Al, 14Si, 22Ti, 25Mn, 26Fe, 29Cu, 30Zn and heavy metals 47Ag, 73Ta, 74W, 78Pt, 79Au and 82Pb were observed. The possible processes which can cause the observed anomalies in the composition of new created chemical elements are discussed shortly.

7-2013-16 (2.728.145)
E19-2013-17 (6.851.243)
Kholmurodov Kh.T. et al.
Molecular Dynamics Simulations of the DNA Interaction with Metallic Nanoparticles and TiO2 Surfaces

The understanding of the mechanism of DNA interactions and binding with metallic nanoparticles (NPs) and surfaces represents a great interest in today's medicine applications due to diagnostic and treatment of oncology diseases. Recent experimental and simulation studies involve the DNA interaction with highly localized proton beams or metallic NPs (such as Ag, Au, etc.), aimed at targeted cancer therapy through the injection of metal micro- or nanoparticles into the tumor tissue with consequent local microwave or laser heating. The effects of mutational structure changes in~DNA and protein structures could result in destroying of native chemical (hydrogen) bonds or, on the contrary, creating of new bonds that do not normally exist there. The cause of such changes might be the alteration of one or several nucleotides (in DNA) or the substitution of specific amino acid residues (in proteins) that can lead to the essential structural destabilization or unfolding. At the atomic or molecular level, the replacement of one nucleotide by another (in DNA double helices) or replacement of one amino acid residue by another (in proteins) cause essential modifications of the molecular force fields of the environment that break locally important hydrogen bonds underlying the structural stability of the biological molecules. In this work, the molecular dynamics(MD) simulations were performed for four DNA models and the flexibilities of the purine and pyrimidine nucleotides during the interaction process with the metallic NPs and TiO2 surface were clarified.
E17-2013-18 (1.178.908)
Dushanov E.B. et al.
A Comparative MD Analysis of the Structural and Diffusion Properties of Formamide/Water and Ethanol/Water Mixtures on TiO2 and Pt Surfaces

Formamide-surface interaction was one of the main discussion topics at the round table meeting of the conference Italia-Russia@Dubna «Astrobiology: New Ideas and Research Trends» (2011). The nucleic acid components synthesized by formamide and their cosmic dust analogs have been widely considered to be the best candidates with regard to the early stages of the formation of biological molecules needed for life. Titanium dioxide (TiO2, anatase), zircon (ZrO2), and other minerals could influence as matrix elements for synthesis of nucleic acid bases from formamide, which is followed by temperature and UV heating. In the dark conditions, the experimental data on formamide adsorption at 300 K over the (001) plane of TiO2 indicate some amount of unreacted formamide and water among the reaction products (CO, H2, NH3, HCN). So far, some concentration of water and its involvement in formamide/TiO2 interaction has been experimentally shown to be an important component of the process. In this paper, molecular dynamics (MD) simulation of interaction between a formamide-water solution and a TiO2 (anatase) surface is performed. A comparative MD analysis is done of the formamide-water/(TiO2, Pt) and ethanol-water/(TiO2, Pt) systems in a temperature range from 250 to 400 K to compare their structural and diffusion properties.

E2-2013-19 (540.110)
Wergieluk A. et al.
Pion Dissociation and Levinson's Theorem in Hot PNJL Quark Matter

Pion dissociation by the Mott effect in quark plasma is described within the generalized Beth-Uhlenbeck approach on the basis of the PNJL model, which allows for a unified description of bound, resonant and scattering states. As a first approximation, we utilize the Breit-Wigner ansatz for the spectral function and clarify its relation to the complex mass pole solution of the pion Bethe-Salpeter equation. Application of the Levinson theorem proves that describing the pion Mott dissociation solely by means of spectral broadening of the pion bound state beyond TMott leaves out a significant aspect. Thus, we acknowledge the importance of the continuum of scattering states and show its role for the thermodynamics of pion dissociation.

P15-2013-20 (2.237.428)
Didyk A.Yu., Winiewski R., Wilczynska-Kitowska T.
Changes of Surface Structure and Elemental Composition of Components of DHPC Inner Surfaces, Irradiated with 10-MeV Quanta in Dense Deuterium Gas

This work is a continuation and addition to [1], which presented results on the studies of surface and elemental compositions of Pd rod and brass screw for collection of nuclear and chemical reaction products in a deuterium high-pressure chamber (DHPC) under irradiation with quanta with an energy of 10 MeV during 18 h at the electron accelerator MT-25 at the beam current 11-13 A. The DHPC was filled with 1.2 kbar molecular deuterium, in which a Pd rod saturated with deuterium was loaded. After irradiation the elemental compositions of other surfaces of all DHPC elements, which were inside the DHPC in dense deuterium, were studied using electron scanning microscope and X-ray microprobe analysis. It was established that all surfaces including the surface of a high-purity palladium rod (99.995%) were covered with partly homogeneous layer or large microparticles of lead. Also, such light elements as 6C, 8O, 11Na, 12Mg, 13Al, 14Si, 22Ti, 25Mn, 26Fe, 29Cu, 30Zn and heavy metals as 47Ag, 73Ta, 74W, 78Pt, 79Au and 82Pb were observed. The possible processes which can cause the observed anomalies in the composition of newly created chemical elements are discussed shortly.

P2-2013-21 (292.270)
Dedovich T.G., Tokarev M.V.
Analysis of Fractals with Dependent Branching by Using BC, PaC and SePaC Methods

The concept of space-time dimension in general relativity and quantum theory is briefly discussed. It is noted that the dimension of a discrete space can be determined based on the Hausdorff measure. A fractional dimension is a typical characteristic of a fractal. The formation of hadrons in the interactions of particles and nuclei at high energies is assumed to have fractal properties. The methods of fractal analysis as Box Counting (BC), P-adic Coverage (PaC) and Systems of Equations of P-adic Coverage (SePaC) methods, are used to determine the fractal dimension. A comparative analysis of reconstruction of fractals with dependent branching is performed by these methods. The optimal values of parameters of the methods are determined. They allow us to find the fractal dimension, number of levels and structure of the fractal with maximum efficiency. It is noted that the SePaC method has advantages to the BC and PaC methods for analysis of fractals with dependent branching.

P13-2013-27 (318.518)
Agapov A.V. et al.
One-Dimensional Field Analyzer of Medical Proton Beam in Radiotherapy

A Medical-Technical Complex for hadron radiotherapy of cancer patients based on the 660 MeV proton Phasotron has been constructed and put into operation at JINR. Upgrading of methods, hardware and software for radiotherapy is one of the main tasks for further development of the Facility. This article concerns one of the fields of this work: that is the development of equipment for conformal proton beam therapy and dynamic irradiation of deep lying target - the construction of a device for measurement of proton beam depth-dose curve in a treatment room.

E19-2013-31 (354.751)
Batmunkh M. et al.
Cluster Analysis of HZE Particle Tracks as Applied to Space Radiobiology Problems

A cluster analysis is performed of ionizations in tracks produced by the most abundant nuclei in the charge and energy spectra of the galactic cosmic rays. The frequency distribution of clusters is estimated for cluster sizes comparable to the DNA molecule at different packaging levels. For this purpose, an improved K-mean-based algorithm is suggested. This technique allows processing particle tracks containing a large number of ionization events without setting the number of clusters as an input parameter. Using this method, the ionization distribution pattern is analyzed depending on the cluster size and particle's linear energy transfer.

P12-2013-32 (1.077.408)
Norseev Yu. V.
Study of Astatine Chemistry at the Joint Institute for Nuclear Research (Dubna). Discovery and Study of Properties of New Inorganic and Organic Compounds of Astatine, Creation of Radiopharmaceuticals for Therapy

This review is devoted to the discovery of a univalent positive astatine ion which was found to be stable in aqueous solutions. For the first time a septavalent astatine compound - a perastatate ion - was obtained. Element-organic compounds of polyvalent astatine are successfully synthesized. Methods of acyclic and aromatic astatinated-organic compounds synthesis are developed. Some thermodynamic characteristics of newly obtained organic compounds of astatine are determined. Study of therapeutic influence of astatine-211 alpha-radiation on cancer formations is carried out. The high therapeutic efficiency of 211At-tellurium colloid was demonstrated in vivo on the Erlich ascite carcinoma cells. New conditions for introducing astatine to monoclonal antibodies of ovarian cancer type are found. The experimental data of the selective accumulation of 3.7(dimethylamino)phenothiazine chloride (methylene blue (MTB)) targeted with 211At (211At-MTB) in human pigmented melanoma cells are shown; this process confirms the high affinity of the MTB to the melanin of the tumor cells. In vivo experiments showed that 211At-MTB introduced to mice with melanoma tumor is intensively accumulated in the tumor.

E12-2013-33 (245.346)
Bolortuya D. et al.
Study of the correlation between the coal calorific value and coal ash content using X-ray fluorescence analysis

In this paper we have studied the possibility of determining the chemical elements in coal samples using X-ray fluorescence analysis and have found a relationship between the coal calorific value and its ash content with the coal moisture accounting. The amount of coal ash can be determined by the content of the basic chemical elements, such as Si, Sr, Fe, and Ca. It was concluded that the calorific value of coal can be estimated from the ash content in coal without the calorimetric measurements. These correlation coefficients were calculated for several coal mines in Mongolia. The results are in good agreement with the results of chemical analysis.

P13-2013-34 (193.008)
Pepelyshev Yu.N. et al.
Model of Dynamics of the IBR-2M Pulsed Reactor for Analysis of Fast Transients

On the basis of the program system MATLAB the nonlinear dynamics model of the IBR-2M pulsed reactor which links values of variables at discrete moments (at moments of appearance of power pulses) is established. The testing by means of modeling calculated processes in the IBR-2M shows the correctness of the model. A preliminary estimate of the transfer coefficient of the linear part of the automatic regulator is obtained.

P1-2013-36 (381.982)
Afanasiev S.V. et al.
Fragmentation of 7-9 GeV/c Deuterons into Cumulative Kaons

There are presented data of kaon production in the reaction d + Be K(0) + X in the xc cumulative variable region from 0.88 to 1.37. The xc 1 values correspond to internucleon distances (the deuteron core region), where the nucleon wave functions begin to overlap forming the hadron cluster (flucton) with density above the average one of nuclear matter. The behaviour of K+ and K- yields ratio in this xc region can be interpreted within the framework of hypothesis of the hard quark seà increasing in nuclei due to flucton component presence in the nuclear matter.

E6-2013-37 (408.671)
Izosimov I.N. et al.
Detection of Lanthanides and Actinides in Solutions by Laser-Induced Luminescence and Chemiluminescence

Application of time-resolved laser-induced luminescence spectroscopy and time-resolved laser-induced chemiluminescence spectroscopy to detection of lanthanides and actinides in solutions is discussed. The characteristics of chemiluminescence induced by excited lanthanide and actinide complexes in solutions are considered. A possibility of using chemiluminescence for selective detection of actinide and lanthanide ions having no intrinsic luminescence is discussed. It was shown that high selectivity of detection can be reached with the use of multistep scheme of chemiluminescence excitation. It is concluded that time-resolved luminescence or chemiluminescence laser spectroscopy can be successfully used for selective detection of lanthanides and actinides in solutions.

P18-2013-38 (199.236)
Kravtsova A.V., Milchakova N.A., Frontasyeva M.V.
Multielement Instrumental Neutron Activation Analysis of Macroalgae Cystoseira Used as Biomonitor of the Black Sea Coastal Waters Pollution (South-Western Crimea, Sevastopol)

For the first time for Sevastopol region the peculiarities of 26 (Na, Mg, Al, Cl, K, Ca, Sc, V, Mn, Fe, Co, Ni, Zn, As, Br, Rb, Sr, Sb, I, Cs, Ba, Sm, Nd, Ag, Au and U) macro- and microelements accumulation in the thalli of brown algae Cystoseira from the coastal waters of south-western Crimea (the Black Sea) were studied using instrumental neutron activation analysis (INAA). The possibility of using brown algae Cystoseira as a biomonitor of coastal waters pollution was shown.

9-2013-39 (8.907.291)
P15-2013-41 (496.716)
Didyk A.Yu., Winiewski R.
Results of Irradiation of Aluminum and Homogeneous Alloy YMn2 by 23 MeV Energy -Quanta in the Atmosphere of Molecular Deuterium at 2 kbar Pressure

Metal samples were placed in a deuterium high pressure chamber of «finger type» (DHPC-FT) along its length. The samples were two aluminum rods, a copper rod, two pieces of homogeneous alloy YMn2 and stainless steel wire. The deuterium molecular pressure inside the DHPC-FT was about 2 kbar. Irradiation of the samples was carried out by the braking -quanta with the threshold energy 23 MeV. All the samples were studied using a scanning electronic microscope (SEM) with roentgen microelement probe analysis (RMPA). Significant changes in the surface structures and element compositions are observed in all the measured samples of aluminum, as well as full destruction of homogeneous alloy YMn2, formation of «single crystals» of YMn2 and a structure similar to crystals on the base of Mn. A phenomenological description of the observed phenomena and effects based on nuclear reactions with taking into consideration some new approaches are proposed.

P15-2013-42 (1.153.579)
Didyk A.Yu., Winiewski R.
Results of Irradiation of Stainless Steel and Copper by 23 MeV Energy -Quanta in the Atmosphere of Molecular Deuterium at 2 kbar Pressure

Metal samples were placed in a deuterium high pressure chamber of «finger type» (DHPC-FT) along its length. The samples were two aluminum rods, a copper rod, two pieces of homogeneous alloy YMn2 and stainless steel wire. The deuterium molecular pressure inside the DHPC-FT was about 2 kbar. Irradiation of the samples was carried out by braking -quanta with a threshold energy of 23 MeV. All the samples were studied using scanning electronic microscope (SEM) with roentgen microelement probe analysis (RMPA). Significant changes in the surface structures and element compositions were observed in all the measured samples: copper, aluminum, YMn2 alloy and stainless steel. All of the obtained unusual results were analyzed in detail and compared with previous ones.

P14-2013-43 (1.288.688)
Hofman A., Didyk A., Semina V.
Effect of Radiation on Corrosion and Irradiation-Assisted Stress Corrosion Cracking of Austenitic Stainless Steels

This paper presents the processes occurring in corrosion cracking of austenitic steels after irradiation, effects of these processes on the environment and the mechanical properties, as well as radiation-induced segregation phenomenon: the influence of neutron irradiation on the microstructure and microchemical changes resulting in a decrease of corrosion resistance and the chemical activity of the corrosive environment. It presents the opportunity to simulate the microstructural and microchemical changes occurring in reactor-irradiated austenitic steels using charged particles (ions, protons, electrons).

P14-2013-46 (170.174)
Kuklin A.I. et al.
Some Specific Features of Experiment Realization at SANS Spectrometer at IBR-2

The problems concerning specific features of experiment realization at a small angle neutron scattering spectrometer located at the 4th beam-line of IBR-2 are discussed. The scheme and mathematical background of the experiment are described. The possibility of two ways of measuring the transmission, background conditions of the experiment as well as another standard for normalization are considered. The advantages of the existing spectrometer configuration are shown. The density distribution of flux on the sample is presented. Formulas for scattering curve correction are calculated. The possibility of data correction in the case of an empty cell is shown.

P13-2013-47 (429.684)
Arzumanyan G.M.
Multimodal Optical Platform for Condensed Matter Studies

This publication describes the functionality and performance of the multimodal optical platform, installed and launched at the Joint Institute for Nuclear Research in 2012. The platform, called «CARS microscope» for short, was developed, designed and constructed to the order of JINR in Minsk, by the Belarus-Japan joint venture «SOLAR TII» (in May 2012 the company was renamed into «Sol Instruments»). The main functionality of the platform is based on the microscopy and spectroscopy of spontaneous Raman scattering and its nonlinear modification - stimulated coherent Raman scattering, known as CARS - Coherent Anti-Stokes Raman Scattering.

4-2013-48 (1.619.756)
P9-2013-49 (515.813)
Azaryan N.S. et al.
The Influence of the Conjugation Geometry of a Superconducting Niobium Cavity with a Drift Pipe on Its Characteristics

Using numerical recipes geometry of connection of superconductive niobium cavity with beam-pipe is investigated. Calculations show the advantage of elliptical connection of the cavity with the beam-pipe in comparison with connection by circle: elliptical connection allows reducing the maximum electric field strength at the cavity wall by 7-10 %.

P13-2013-50 (484.537)
Azorskiy N.I. et al.
Design and Test Results of NA62 Straw Detector First Prototype

The design of the NA62 detector prototype produced at JINR is described. The detector is based on straw tubes and supposed to work in vacuum. The results of the prototype's straw resolution and efficiency measurements made on the CERN SPS beams are presented for various front-end electronics, gas mixtures and beam rates. Prescriptions are given for the full-scale detector design.

P18-2013-52 (258.926)
Molokanova L.G., Nechaev A.N., Apel P.Yu.
The Effect of Surfactants' Concentration on the Geometry of the Formed Pores by Etching of the Polyethelene Naphtalate Films Irradiated with High-Energy Ions

A process of alkaline etching of latent tracks of high-energy heavy ions in polyethelene naphtalate is studied. Surface-active agents have been added to the alkaline etching solution. The presence of surfactants thus provides the formation of non-cylindrical spindle-shaped pores in the track etched membrane. A method for the quantitative assessment of the spindle-shaped morphology of pores has been developed. The influence of the alkali concentration, temperature of the etching solution, and the surfactants' concentration on the membrane pore structure and its transport properties has been investigated. The synthesis conditions which allow one to produce track membranes (as compared to TM with cylindrical pores) with the best transport properties have been found.

D9-2013-53_eng (571.060)
Meshkov I.N.
Barrier Bucket Method in Cyclic Accelerators

The paper describes the main principles of the Barrier Bucket Method of charge particles stacking and acceleration in proton synchrotrons. The consideration is done with two models of «rectangular barriers» and «quasi-sinusoidal» ones using different approaches to analysis of particle motion. The first of them - so-called «step by step approach», allows us to give a very clear physical explanation of the method and obtain easily the main characteristics of the method in analytical form. However, that is not always an efficient way. Therefore, the general case of the «barriers» of an arbitrary form is considered as well and differential equations of particle phase motion are derived. This approach gives ample opportunities for analysis and numerical simulations of different phase dynamics regimes of particles in cyclic accelerators. Numerical examples for the method illustration are presented.

D9-2013-53_rus (541.399)
Meshkov I.N.
Barrier Bucket Method in Cyclic Accelerators

The paper describes the main principles of the Barrier Bucket Method of charge particles stacking and acceleration in proton synchrotrons. The consideration is done with two models of «rectangular barriers» and «quasi-sinusoidal» ones using different approaches to analysis of particle motion. The first of them - so-called «step by step approach», allows us to give a very clear physical explanation of the method and obtain easily the main characteristics of the method in analytical form. However, that is not always an efficient way. Therefore, the general case of the «barriers» of an arbitrary form is considered as well and differential equations of particle phase motion are derived. This approach gives ample opportunities for analysis and numerical simulations of different phase dynamics regimes of particles in cyclic accelerators. Numerical examples for the method illustration are presented.

P19-2013-54 (261.131)
Vinogradova Yu.V. et al.
Damage and Functional Recovery of the Mouse Retina after Exposure to Genotoxic Agents

As is known, the mature retina is characterized by high radiation resistance. We showed earlier that ionizing radiation at a dose of 25 Gy and the chemical genotoxic agent methylnitrosourea (MNU) in a concentration of 60 mg/kg induce acute retinal degeneration, combined with proapoptotic protein expression. The process has a high genotoxic threshold, below which no degeneration signs were traced.

The aim of this work was to study the damaging effect of ionizing radiation and MNU on the functional activity of the retina and its ability to recover after exposure to these genotoxicants. The functional activity of the mouse retina was evaluated with electroretinograms (ERG). In parallel, morphological changes in the retina were controlled, and the TUNEL detection of the death of its cell elements was performed. It has been shown that gamma rays or accelerated proton irradiation below 15 Gy cause no structural or functional changes in the mouse retina, which confirms the mature retina's high radiation resistance. Irradiation with a higher dose of 25 Gy leads to photoreceptor layer destruction. This goes along with an increase in the number of the TUNEL-positive photoreceptors, among which are cells with fragmented nuclei, which are typical of apoptosis. MNU in a concentration of 70 mg/kg caused the irreversible loss of the retina's physiological activity, and the morphological degeneration of photoreceptors and their mass death. In a concentration of 35 mg/kg, however, MNU had no cytotoxic effect on the retina. Moreover, this dose caused a reversible ERG amplitude decrease. Also, adaptive response was observed in the retina, which became apparent after two consecutive MNU injections - first, at a dose of 17 mg/kg; then, at a cytotoxic dose of 70 mg/kg. These results point to the possibility of the neurohormesis effect, which was described concerning the retina's exposure to ionizing radiation and some chemicals.


E2-2013-56 (443.355)
Aparin A.A., Tokarev M.V.
Self-Similarity of Low-pT Cumulative Pion Production in Proton-Nucleus Collisions at High Energies

The experimental data on inclusive spectra of the + mesons produced in p + A collisions at an incident proton momentum of 400 GeV/c obtained by G.Leksin group at FNAL are analyzed in the framework of z-scaling. Self-similarity of the hadron production in the low-pT cumualtive region is verified. Scaling function (z) for the Li, Be, C, Al, Cu, Ta nuclei is constructed. It is expressed via the invariant cross section and average multiplicity density of charged particles. Results of the analysis of the low-pT data are compared with the high-pT data sets obtained by J.Cronin, R.Sulyaev and D.Jaffe groups. A microscopic scenario of p + A interactions in terms of momentum fractions x1, x2 is discussed. Indication of self-similarity of the cumulative pion production in p + A collisions over a wide kinematical range has been found. Based on the universality of the shape of the scaling function, the inclusive cross sections of the + mesons produced in p + A collisions on the Li, Be, C, Al, Cu, Ta targets in deep-cumulatice region (x2 1/A) are predicted.

P13-2012-57 (1.734.949)
Astabatyan R.A. et al.
A Wide-Aperture Set-Up for Investigation of Di-Tritium Structure of Exotic Nucleus 6He

A wide-aperture set-up on the basis of low pressure (P 1 torr) gas-filled chambers for the measurement of low-energy (Z 1 and 0.02-0.1) reaction products at the angles close to 180 is presented. All these chambers have non-sensitive beam-way areas. Those areas are transparent and do not contain any matter, except the working gas. The results of (TOF, dE, E)-identification using the 226Ra isotope and low-energy ion beams are given. Estimation of such set-up characteristics as angular, energy-losses, energy, time-of-flight resolutions was carried out. The possibility of direct measurements of the nucleus excitation energy, in particular of highly-excited states of the exotic nucleus 6He* T1 + T2, is discussed.

P13-2013-58 (219.937)
Astabatyan R.A. et al.
The Results of Measurements of Ion Energy Losses in the Range of 0.01-0.06 in Thin Absorbers

The results of measurements of ion energy losses in the insufficiently known range of = 0.01-0.06 in thin (x 2 mg/cm2) absorbers are presented. The energy losses and time of flight of the ions were measured simultaneously using low-pressure avalanche gas-filled detectors at P 1 torr. Also, measurements of the ions residual energy were made by a semiconductor detector. The energy of the ions with 0.01-0.03 was reconstructed using the time-of-flight measurements. The E(E) dependence for 4He, Be, C, O ions is presented.

P4-2013-59 (99.062)
Kosmachev O.S.
On the Perspectives of Tau-Lepton Physics

Holistic description of the lepton sector shows that relativity and discrete symmetries are the primary basis for the formation of a structure of lepton wave equations. We call the structure of lepton sector as a set of substructures of each lepton equation which distinguish one particle from another and describe their interactions on the basis of these differences. Tau-leptons can decay directly into leptons and hadrons with consequent disintegration of the latter again into leptons. This creates a unique opportunity for the study and description of the hadron structure on the basis of relativistic substructures simular to leptons.

15-2013-60 (4.735.939)
P11-2013-61 (671.360)
Batgerel B., Nikonov E.G., Puzynin I.V.
Molecular Dynamic Simulation of Impact of Nanocluster with Metallic Solid Surface

We have simulated the impact of uncharged metal nanoclusters beam with solid metal surface by molecular dynamics. The penetration depth of clusters atoms in solid material and thickness of deposited layer on the surface are studied, depending on the energy of incident particles in the beam, the size of nanoclusters and the frequency of beam. It has been found that the penetration depth and thickness of the surface layer are dependent on the above parameters of nanocluster. It was also found that the thickness of deposited layer is not dependent on size of cluster and frequency of the beam, while incident energy is increasing. The studied problems may be of interest to obtain new materials, which have surface layer with new physical and chemical properties that significantly differ from those of base materials.

9-2013-63 (4.842.167)
P18-2013-64 (1.180.864)
Artoshina O.V. et al.
Molecular Dynamics Simulations of the Formamide Interaction Processes with Hydrocyanic Acid on a Catalytic Surface of TiO2

In the presence of a catalyst and water under heating, formamide allows synthesis of nucleic acids, nucleosides, nucleotides and other organic compounds significant for life. The aim of this work is to study the structural and dynamic (diffusive) processes for water-formamide and hydrocyanic acid-formamide solutions in the presence of titanium dioxide (with an anatase lattice) under heating. We have simulated and compared the behavior of two systems: water-formamide and hydrocyanic acid-formamide solutions on an anatase surface by the molecular dynamics (MD) method. The interaction activation energies for the temperature range of 250 to 400 K have been estimated. The diffusion coefficients and structural radial distribution functions for formamide, water and hydrocyanic acid on an anatase surface have been calculated. The calculated activation energies of the water-formamide anatase and hydrocyanic acid-formamide anatase systems are analyzed and compared. A comparative analysis of the systems under investigation is performed; a possible correlation between the obtained MD results and the molecular mechanism involving formamide's interaction on the adsorbing surface of titanium dioxide are discussed.

P9-2013-66 (1.398.809)
Nesterov A., Butenko A., Sidorin A.
Getter Pump and Its Work in Pumping System of the Nuclotron Beam Pipe

After modernization of the Nuclotron vacuum system a series of experimental investigations of composition and pressure of the residual gas in the beam pipe were performed at different parameters of the magnetic field cycle. The main goal was optimization of work of the vacuum pumps and, in particular, investigation of a possibility to use at the Nuclotron a pump on the basis of non-evaporated getter. The performed work has shown that the getter pump can successfully exchange or complement the existing vacuum pumps.

E1-2013-68 (508.756)
Dolgij S.A. et al.
Spin-Rotating Magnet for the L(np) Experiment at VBLHEP JINR

The spin-rotating magnet (SRM) is purposed for the orientation rotation of the nucleon spins in the polarized nucleon beam from the transverse (T) direction with respect to the nucleon beam momentum to the longitudinal (L) one. The longitudinally polarized neutron beam was used in the experiment for measuring the total cross-section difference L(np) with parallel and antiparallel orientation of the participant L polarization.

To perform the nucleon spin rotation in the polarized nucleon beam through the angle of 90 over the beam momentum region of ~ 1.8-5.5 GeV/c, a proper spin rotation device had to be prepared. For this purpose, the necessary calculations of corresponding values of the magnetic induction integral were carried out. Using the calculations the dipole magnet of SP57 type was chosen for the L(np) experiment and the required reconstruction of its pole tips was also accomplished. After the SRM installation at the neutron beam line, the appropriate apparatus set for the magnetic measurements was prepared and the precise measurements of the whole set of the SRM characteristics were performed. The obtained results for the SRM magnetic field parameters were successfully used during the L(np) experimental runs to specify the current at this magnet coil corresponding to the calculated magnetic induction integral for the given neutron beam momentum.


P9-2013-70 (172.426)
Amirkhanov I.V. et al.
Mathematical Modeling of Beam Dynamics for Estimation of Operation Modes of Isochronous Cyclotron

The work presents the equations of motion and the numerical results of estimating the quality of the isochronous magnetic field calculated for the main operation mode of the AIC-144 multipurpose isochronous cyclotron located at the Institute of Nuclear Physics, Polish Academy of Sciences, and intended for carrying out proton radiotherapy of eye melanoma. The main operation mode of the AIC-144 cyclotron is simulated using a new technique. After successful realization of the current variant of the specified operation mode on the AIC-144 cyclotron in July, 2012 and fine tuning of amplitude of central bump of formed magnetic field in October, 2012, the beam dynamics was calculated using the programs developed at the Laboratory of Nuclear Problems, Joint Institute for Nuclear Research.

P13-2013-72 (213.551)
Salamatin K.M.
Choice of Technology for Building Component System for Neutron Spectroscopy Experiments Automation

The analysis of popular technologies RPC, dynamic linking of components, the integration of components into the system, automating of the network configuration for communication in a distributed system was performed. The best option for use in automated experiments (SAE) was chosen. The conclusion about the feasibility of developing algorithms to dynamically link components for tasks of SAE has been made. As a result, methodological framework for developing component-based experiments automation system is formulated.

P13-2013-74 (594.846)
Salamatin I.M., Salamatin K.M.
Development of Component EAS for Low Energy Physics on the Base of the Network Technology Usage

The analysis of specifics of the experiment automations systems (EAS) is performed. Reasons of the components reusability loss are shown. The conception of automatically integrated EAS, providing components usage in different experiments without change of the other parts of the system and modification EAS by the user is formulated. Key tasks, solution of which is required for building of such system are defined and their solution with use of modern network technologies is described. The group of designed standard components are checked in real experiments at the reactor IBR-2.

P13-2013-75 (225.261)
Turek M. et al.
Numerical and Experimental Methods for Investigations of Doubly Charged Ion Production for Implantation Purpose

The paper describes production of doubly charged ions from solids and gases using a hollow-cathode ion source with an internal evaporator heated by a spiral cathode filament and arc discharge. The currents were 15 mA for Bi2+, 10 mA for As2+ and Al2+, 8 mA for Kr2+ and Xe2+, 5 mA for In2+ and Ge2+, enabling a moderate (~ 1015 cm-3) dose of doubly charged ion implantations. Characteristics of the ion source are discussed in order to choose the optimal working parameters. A numerical model of doubly and singly charged ions in the source is briefly described. The calculated results (dependences of ion current on anode voltage) are in good agreement with the experimental data.

9-2013-76 (6.107.267)
P16-2013-77 (182.472)
Kubancak J., Molokanov A.G.
Measurements of LET Spectra of the JINR Phasotron Radiotherapy Proton Beam

Linear energy transfer (LET) is one of the most important parameters which characterize biological effects of ionizing radiation.

The spectra of linear energy transfer at different depths of the radiotherapy proton beam were measured using an active silicon detector LIULIN. The spectrometer of a linear energy transfer LIULIN is a small 256-channel spectrometer-dosimeter with a silicon (Si) semiconductor detector with an effective area of 10 20 mm and a thickness of 300 microns. LIULIN measures energy deposition in Si of each particle passing through the detector, the spectra of energy deposited in Si can be transformed to the LET spectra. The resulting information is written into the flash memory and can be read by using a personal computer.

LET spectra measurements were carried out at several points of the depth dose distribution from the proton beam entrance to the Bragg peak region and in modified beams. Measured spectra are used to analyze the effects of radiation on biological objects.


E2-2013-78 (268.967)
Ivanov E., Sidorov S.
Deformed Supersymmetric Mechanics

Motivated by a recent interest in curved rigid supersymmetries, we construct a new type of = 4, d = 1 supersymmetric systems by employing superfields defined on the cosets of the supergroup SU(2|1). The relevant worldline supersymmetry is a deformation of the standard = 4, d = 1 supersymmetry by a mass parameter m. As instructive examples we consider at the classical and quantum levels the models associated with the supermultiplets (1,4,3) and (2,4,2) and find out interesting interrelations with some previous works on nonstandard d = 1 supersymmetry. In particular, the d = 1 systems with «weak supersymmetry» are naturally reproduced within our SU(2|1) superfield approach as a subclass of the (1,4,3) models. A generalization to the = 8, d = 1 case implies the supergroup SU(2|2) as a candidate deformed worldline supersymmetry.

P4-2013-79 (175.822)
Pupyshev V.V.
Length and Effective Range of Two-Dimensional Scattering of a Quantum Particle by a Central Short-Range Potential

The derivation and qualitative analysis of the nonlinear and linear equations adopted for calculation of the scattering length and effective range are given. In the case of the central square-well potential, the exact solutions of these equations are found and studied. The connection between the effective range and scattering length is revealed. Special attention is paid to the cases of zero and unrestricted scattering lengths.

P15-2013-80 (558.889)
Didyk A.Yu., Winiewski R.
Structure and Chemical Composition Changes of Pd-Rod and Reaction Product Collector Irradiated by 10 MeV Braking Gamma Quanta inside High Pressure Chamber Filled with 2.5 kbar Molecular Hydrogen

A research of the elemental composition and surface structure of a Pd~rod saturated with hydrogen and a brass collector of nuclear and chemical reaction products irradiated by 10 MeV braking gamma quanta in dense molecular hydrogen gas at 2.5 kbar pressure is carried out. The changes of the elemental composition and surface structure of the Pd~rod and collector similar to analogous changes in the experiment carried out in dense gas deuterium are observed. Possible explanations of the firstly observed phenomenon are offered.

P4-2013-81 (244.262)
Pupyshev V.V.
Energies of Weakly-Bound and Near-Threshold Resonance States of a Quantum Particle in the Two-Dimensional Plane

By assumption, a slow quantum particle moves in the two-dimensional plane of the three-dimensional configuration space and its movement takes place in the field of a central short-range potential. It is shown that the approximated energies of the weakly-bound and near-threshold resonance states of this particle are defined via the roots of the transcendental equations containing two parameters: the scattering length and effective range. The sufficient conditions for solvability of those equations are found. The dependence of their solutions on the parameters is studied.

E13-2013-82 (1.798.849)
Chirikov-Zorin I. et al.
The Design of à Module of a New Electromagnetic Calorimeter for COMPASS II

A new-generation high-granularity Shashlyk EM calorimeter read out by micropixel avalanche photodiodes with thermostabilization based on the Peltier element is designed and constructed.

9-2013-83 (4.961.185)
P15-2013-84 (160.497)
Karamian S.A. et al.
Methods for Production of 195mPt Isomer

Among nuclides promising for application in radio-therapy of patients, the 195mPt isomer is characterized by appropriate properties. Effective ways for optimization of the Pt isomer yield at low impurity content must be searched for. The method based on double neutron capture by the 193Ir target nucleus with consequent population of 195mPt through - decay allows chemical isolation of the isomer. In the present work, the problem is analyzed, a test experiment on Ir activation with neutrons is performed, and theoretical estimates for the 195mPt yield are given. A full-scale model experiment at the IBR-2 reactor in Dubna must clarify the practical efficiency of the method.

P4-2013-85 (388.735)
Pupyshev V.V.
Effective-Range Approximation in the Problem of Two-Dimensional Scattering by a Central Short-Range Potential

The role of weakly-bound and near-threshold resonance states of a quantum particle in its elastic low-energy scattering is studied. The energies of those states are defined in the effective-range approximation via the roots of the transcendental equations. This approximation is also used for analysis of the scattering. Explicit low-energy asymptotics of all partial phase-shifts and cross-sections are obtained and investigated. These asymptotics contain the energies of weakly-bound and near-threshold resonance states.

P13-2013-86 (592.798)
Salamatin K.M.
A Variant of the Component-Based System for Spectrometry Experiments Automation Constructed Using Network Technologies

Based on the analysis of modern network technologies and specificity of experiment automation systems (EAS), the causes and sources of the difficulties arising under repeated usage of EAS components are shown. The concept of the component-based EAS which provides EAS modification in accordance with the change of the experiment method by the user is formulated. The key tasks necessary for the construction of such a system are identified: the development of a universal subsystem for the experiment method description and an environment for distributed components interaction. The implementation of these tasks is described. Some of the developed typical components are checked in real experiments at the IBR-2 reactor. These results increase reliability and significantly reduce the time of development and modification of the EAS.

D18-2013-87_r (1.224.701)
Pavlov S.S., Dmitriev A.Yu., Frontasyeva M.V.
Automation of Reactor Neutron Activation Analysis

The present status of the development of a software package designed for automation of NAA at the IBR-2 reactor of FLNP, JINR, Dubna, is reported. Following decisions adopted at the CRP Meeting in Delft, August 27-31, 2012, the missing tool - a sample changer - will be installed for NAA in compliance with the peculiar features of the radioanalytical laboratory REGATA at the IBR-2 reactor. The details of the design are presented. The software for operation with the sample changer consists of two parts. The first part is a user interface and the second one is a program to control the sample changer. The second part will be developed after installing the tool.

D18-2013-87_e (1.335.058)
Pavlov S.S., Dmitriev A.Yu., Frontasyeva M.V.
Automation of Reactor Neutron Activation Analysis

The present status of the development of a software package designed for automation of NAA at the IBR-2 reactor of FLNP, JINR, Dubna, is reported. Following decisions adopted at the CRP Meeting in Delft, August 27-31, 2012, the missing tool - a sample changer - will be installed for NAA in compliance with the peculiar features of the radioanalytical laboratory REGATA at the IBR-2 reactor. The details of the design are presented. The software for operation with the sample changer consists of two parts. The first part is a user interface and the second one is a program to control the sample changer. The second part will be developed after installing the tool.

P7-2013-90 (875.167)
Artukh A.G. et al.
A Secondary Beam Separator (Project of Combination of Fragment-Separator COMBAS with Ion Catcher)

The design of a facility basing on the combination of the high-luminosity fragment-separator COMBAS and fast Ion Catcher is discussed. The main characteristics of the COMBAS fragment-separator and Ion Catcher determining the prospects for application of the proposed combination are presented. The realized facility is expected to permit production of secondary radioactive beams of higher quality in comparison with the «in-flight» separator technique. It is planned to use the facility in a combination with a post-accelerator for producing mono-isotopic and mono-chromatic intensive secondary radioactive beams in a wide region of A and Z numbers. A list of perspective scientific problems which demand high-intensity and high-quality secondary radioactive beams is proposed.

P13-2013-91 (242.597)
Salamatin K.M.
DiCME - Distributed Components Messaging Environment for Low Energy Physics Experiments Automation

Complicated modern experiments automation systems (EAS) are component-based distributed systems. Functionality and data of some components should be available to others. RPC algorithms introduce hard components coupling and are executed synchronously in a «one-to-one» mode, which complicates the implementation of real-time systems. The designed layer for inter-process communication DiCME uses a new method of dynamic binding and is a powerful tool for automatic integration of components that provides the use of the EAS components code in different experiments without editing the other parts of the system.

P13-2013-92 (153.670)
Salamatin K.M.
PSJ - A Unified Subsystem for Description of Experimental Technique

Code reuse is the main methodology that reduces the development time of complex systems. If you attempt to use the components of the experiment automation system (EAS) in an experiment with a research method which has not been provided, or with other experimental setup, we are faced with the need to edit other parts of the EAS. The objective reasons for the loss of the ability to reuse components are two. They are the hard coupling of components and variability of experimental techniques. In this paper we propose to solve problems related to changes in the experimental procedure, by the use of a dedicated subsystem for description of the experimental procedure and the construction of the EAS with standard software components. The reasons for this decision, a description of the algorithms, and implementation of this subsystem are presented.

E15-2013-93 (136.336)
Karamian S.A.
Z-Dependence of the (,) Reaction Yield

Reactions induced by photons may be used as a probe of bonds and correlations between nucleons inside a heavy target nucleus. Electromagnetic radiation perturbs the nucleons only slightly unlike the influence of strongly interacting particles. The yield of (,) reactions could be used to test theoretical models assuming a complete -clustering, or multiquark objects in heavy nuclei. Relative yields of (,n), (,p), and (,) reactions have been measured at the bremsstrahlung end-point energy of 23 MeV with several targets. Much lower probability of (,) compared to (,p) reactions is proved despite similar threshold and spin factors for both types of reactions. Alpha-clustering in heavy targets is not supported. The mechanism of particle release in nuclear reactions is discussed and some details are clarified.

P13-2013-94 (166.629)
Makankin A.M. et al.
A Direct Time Measurements Technique for Determining the Longitudinal Coordinates in Thin-Wall Drift Tubes

A different technique of measuring the longitudinal coordinates by the drift tubes is considered. It is shown that the determination of the longitudinal coordinate by the direct time method provides the best longitudinal resolution. The realization of this method enables the development of coordinate detectors based on the straw with two-dimensional readout, which can be fast enough and not very complex.

P7-2013-95 (365.357)
Sereda Yu.M.
A Study of Fragmentation of 20Ne and 40Ar Ions at the COMBAS Set-up

The main parameters of the COMBAS fragment separator are given in comparison with the world's similar set-ups. The results of experiments to obtain the products in reactions of one-proton stripping from the 40Ar ion beam (35 ÌeV/A) and two-neutron stripping from the 20Ne ion beam (52 ÌeV/A) are presented. The high resolution power of the COMBAS fragment separator to produce secondary neutron-rich and neutron-deficient beams of 39Cl and 18Ne ions, correspondingly, is demonstrated.

1-2013-97 (1.603.428)
E9-2013-99 (607.863)
Smirnov V.L., Azaryan N.S., Vorozhtsov S.B.
Preliminary Parameter Assessments of a Spiral FFAG Accelerator for Proton Therapy

Fixed-Field Alternating-Gradient (FFAG) accelerator was invented in the 1950-60s but never progressed beyond the model stage. Starting from 2000, new interest in this type of accelerator arose. Given advantages of the FFAG over the synchrotron, cyclotron and linac, there are many possible applications of the accelerator. Among them, we are mostly interested in acceleration of protons and light ions for hadron therapy. In this connection a preliminary set of parameters of the facility was estimated and, in particular, the magnetic sector shape and corresponding dynamical properties of the magnetic field of the accelerator were calculated. In addition, preliminary considerations about the RF system design are given.

P13-2013-100 (171.525)
Kuchinskiy N.A. et al.
The Use of Segmented Cathode of a Drift Tube for Designing a Track Detector with a High Rate Capability

Detector rate capability is one of the main parameters for designing a new detector for high energy physics due to permanent rise of beam luminosity of modern accelerators. One of the useful detectors for particle track reconstruction is a straw-detector based on drift tubes. Rate capability of such detectors is limited by the parameters of readout electronics. The traditional method of increasing detector rate capability is increasing their granularity (a number of «elementary» detectors = readout channels) by reducing of the straw diameter and/or by dividing the straw anode wire into two parts (for decreasing the rate per readout channel). A new method of designing straw-detectors with a high rate capability is presented and tested. The method is based on dividing the straw cathode into parts and independent readout of each part.

E2-2013-103 (241.312)
Voskresenskaya O.O., Kuraev E.A., Torosyan H.T.
Coulomb Correction to the Parameters of the Landau-Pomeranchuk-Migdal Effect Theory

Using the Coulomb correction to the screening angular parameter of the Molire multiple scattering theory, we obtained analytically and numerically the Coulomb corrections to the quantities of the Migdal LPM-effect theory. We showed that the Coulomb correction to the spectral bremsstrahlung rate allows completely eliminating the discrepancy between the predictions of the LPM effect theory and its measuremens.

E2-2013-104 (353.030)
Aparin A.A., Tokarev M.V.
Self-Similarity of High-pT Cumulative Hadron Production in p + A Collisions at High Energies at U70

New data on inclusive transverse momentum spectra of charged hadrons produced in p + A collisions at U70 are analyzed in the framework of the z-scaling approach. Self-similarity of the hadron production in the high-pT cumualtive region is verified. Scaling function (z) for C, Al, Cu, W nuclei is constructed. It is expressed via the invariant cross section and the average multiplicity density of charged particles. Results of analysis are compared with the data obtained by J.Cronin, R.Sulyaev and D.Jaffe groups. Self-similarity of the hadron production in p + A collisions over a wide kinematic range is verified. A microscopic scenario of p + A interactions in terms of momentum fractions x1, x2 is discussed. Indication of self-similarity of the high-pT cumulative hadron production in p + A collisions over a wide kinematic range has been found. Based on the universality of the shape of the scaling function, the inclusive cross sections of h- and h+ hadrons produced in p + A collisions on C, Al, Cu, W targets in the high-pT deep-cumulative region are predicted.

E5-2013-105 (170.490)
Zhidkov P.E.
On (W12() W1())-Solutions of the Equation utt= (a(u)ux)x+f(x,t)

We consider the initial value problem for the equation in the title with u(x,0)=u0(x) W1() and ut(x,0)=u1(x) L2() L() in the case when this equation is uniformly hyperbolic. We prove the existence and uniqueness of a local weak solution u(x,t) of this problem such that in particular (u(,t), ut(,t)) (W12() W1()) (L2() L()) for any fixed t in the interval of existence. For smooth initial data, it is proved that the life time of the smooth solution coincides with the life time of our weak solution.

E4-2013-106 (499.209)
Ignatovich V.K., Nesvizhevsky V.V.
Reflection of Slow Neutrons from Powder of Nanorods

Two phenomena were recently observed: efficient diffuse reflection of very cold neutrons (VCN) from nanostructured matter for any angle of neutron incidence to the matter surface, and also quasispecular reflection of cold neutrons (CN) from nanostructured matter for small angles of neutron incidence to the matter surface. In both cases, powder of diamond nanoparticles was used as nanostructured matter, and the measured reflection probabilities by far exceeded the values known for alternative reflectors. Both these phenomena are already used in neutron experiments and for building neutron sources. In the present theoretical work, we consider an option of further increasing the efficiency of nanostructured reflectors due to replacing spherical nanoparticles by nanorods. We showed that VCN albedo from powder of randomly oriented nanorods is lower than their albedo from powder of nanospheres of equal diameter. However, albedo of VCN and quasispecular reflection of CN from powder of long nanorods oriented parallel to the powder surface exceed those for powder of nanospheres of equal diameter.

E18-2013-107 (417.214)
Budagov J., Lyablin M., Shirkov G.
The Search for and Registration of Superweak Angular Ground Motions

The Earth's surface angular oscillations of the seismic, industrial and terrestrial origins have been registered with the high-resolution inclinometer of a new design concept. The microseismic peak was first recognized in the ground microradian motion.

P13-2013-108 (536.473)
Arzumanyan G.M. et al.
CARS Microscope: Possibilities, the First Results, Problems and Prospects

This paper describes the features and the first test measurements carried out at the CARS microscope, launched at the Joint Institute for Nuclear Research (JINR) in 2012. It also identifies some problems that need to be solved and the prospects for further experiments.

P3-2013-109 (154.917)
Rakhimov A.V. et al.
Neutron Activation Analysis of Polyethylene of Neutron Shield of EDELWEISS Experiment

In this work instrumental neutron-activation analysis (INAA) has been applied for estimation of trace contaminations in polyethylene used for the neutron shielding of low background setup of the EDELWEISS experiment. In the EDELWEISS main background arises due to radioactive decays of natural radio-nuclides in all construction materials, even in the shield. Thus, a task of high sensitive many elements analysis of samples from a polyethylene (PE) several tons of which is used by the experiment as a neutron shield is highly relevant. Neutron activation analysis is a method that gives the desired information about the PE. For NAA, polyethylene samples with mass 1-10 g were irradiated during 5-48 h by neutron flux 1 1014ñm-2 s-1 from WWR-SM nuclear reactor of the Institute of Nuclear Physics of AS RUz. As a result in two types of PE presence of 35 elements has been estimated on a level of sensitivities 10-5-10-11 g/g.

E14-2013-111 (223.765)
Ionita I. et al.
Small-Angle Neutron Scattering Investigation of Heat-Treated INCOLOY 800HT Samples: Preliminary Results

INCOLOY 800HT samples subjected for 60 days to different annealing temperatures have been investigated by small-angle neutron scattering (SANS) with the aim to study their microstructural evolution.

E1-2013-113 (256.411)
Litvinenko A.G., Litvinenko E.I.
Simulation of Dependence of the Cross Section of Beam Deuterons Fragmentation into Cumulative Pions and Protons on the Mass of the Target Nucleus

We consider the mechanisms that affect the production of cumulative pions and protons in the fragmentation of incident deuterons into cumulative pions and protons emitted at zero angle. We argue that the peripheral dependence of the scattering cross section on the atomic mass of target nuclei, which was detected in experiments with medium and heavy nuclei, can be described by scattering on target nucleons without introducing additional parameters.

E15-2013-115 (320.936)
Bogdanova L.N., Demin D.L., Filchenkov V.V.
Study of the Mechanism of Muon Catalyzed t + t Fusion Reaction

The mechanism for the muon catalyzed fusion reaction t + t 4Íå + 2n + 11.33 MeV is investigated. The model of the cascade reaction with 5Íå as an intermediate state is considered. Both the ground and the first excited states of 5Íå are taken into account. The neutron energy spectrum measured in the recent experiment is compared with the Monte Carlo-simulated one. Varying reaction parameters, we obtain optimum values for the relative weights of the 5Íå ground and excited states and for the excitation energy and width of the excited state.

P4-2013-116 (154.531)
Gusev A.V.
About the Restrictions on Formulation of the Faraday Electromagnetic Induction Law

In the educational literature the electromagnetic induction law is given by the formula FMC =-d/dt, where FMC is the electromotive force in any circuit L, is the flow of induction B across any surface S, limited by this circuit. Sometimes the electromagnetic induction law is given by another formula: rot E = -B/t. But these formulas have a limited area of use, not quite corresponding to the fundamental phenomenon of electromagnetic induction. In some cases pupils can make fallacies from these formulas. In this article the author offers more universal formulas for the electromagnetic induction law. These formulas allow calculating the FMC and electric field E in circuits of different forms, and not obligatory closed-circuits. In the article it is demonstrated that the vector potential A is a fuller characteristic of the magnetic field than the induction B. The vector potential A gives a more complete presentation about the cause of appearance of E and FMC. A/t (not B/t) is the cause of induction (appearance) of E and FMC.

P11-2013-118 (672.975)
Ablyazimov T.O. et al.
A Kalman Filter Method for the Charged Particles Trajectories Reconstruction in the CBM Experiment and Its Parallel Implementation at the JINR LIT Manycore Server

The charged particles trajectories reconstruction is one of the most important tasks in the CBM experiment (GSI, Germany). The experiment assumes a full online event reconstruction that requires development of fast algorithms which harness the potential of modern CPU and GPU architectures to the best advantage. This work scrutinizes the Kalman filter based track reconstruction algorithm and discusses its implementation under different parallelization approaches. To perform the analysis, a manycore server with two Intel Xeon X5660 CPUs and a NVidia GTX 480 GPU (LIT, JINR) was used.

P12-2013-119 (1.148.953)
Khalansky D.A. et al.
Concentration Dependence of Microstructure Properties of Electrolytic Systems

A novel data obtained in the present work deals with the parameterization strategies and adjustment of the ionic force fields of the alkali cations and halide anions. In the present work, using molecular dynamics (MD) simulation technique, we have investigated four electrolytic systems - HCl-H2O, LiCl-H2O, NaCl-H2O and KCl-H2O - as binary mixtures of water and cations and anions, respectively. For two of the four electrolytes, namely for the HCl-H2O and NaCl-H2O models, the intermolecular interaction parameters were varied, to simulate the possibilities of formation of various ionic shells during the interaction with water.

It is demonstrated that the variation of the potential parameters induces a strong effect on the dynamical and structural characteristics of the electrolyte systems. The MD simulations were performed in the temperature range of 300 to 600 K with step of 50 K. The MD simulations for all electrolyte models (HCl-H2O; LiCl-H2O; NaCl-H2O; KCl-H2O) were also realized on different molar fractions of electrolytes with regard to the concentration of water solvent, - 50:50 (16 mol/kg), 33:66 (8 mol/kg) and 4:96 (1 mol/kg).

The diffusion activation energies were calculated on the basis of Arrhenius equation, thereby constructing the temperature dependence graphs of diffusion coefficient for all four electrolyte systems. The observed diffusion properties of the electrolyte systems were found to correlate well with the energetical and structural radial distribution data.


P9-2013-120 (710.390)
Gikal B.N. et al.
Development, Creation and Start-up of DC-110 Heavy Ion Cyclotron Complex for Industrial Production of Track Membranes

The cyclotron of heavy ions DC-110 for industrial production of track membranes has been developed and created at the Laboratory of Nuclear Reactions, JINR. The cyclotron is equipped with an electron-cyclotron resonance ion source, working at 18 GHz frequency. In 2012 the accelerating complex was put into operation, beams of 40Ar6+, 86Kr13+, 132Xe20+ ions of 2.5 MeV/nucleon energy and intensity of 13, 14.5 and 10.5 A accordingly have been obtained. On the specialized channel, irradiation of a polymeric film has been carried out, track membranes with high uniformity pores have been obtained. DC-110 accelerating complex is capable of making up to 2 million square meters of track membranes per year.

E9-2013-121 (1.483.813)
Samsonov E.V. et al.
Numerical Simulation of Ion Acceleration and Extraction in Cyclotron DC-110

At the Flerov Laboratory of Nuclear Reactions of JINR, in the framework of the project BETA, a cyclotron complex for a wide range of applied research in nanotechnology (track membranes, surface modification, etc.) is being created. The complex includes a dedicated heavy-ion cyclotron DC-110, which yields intense beams of accelerated ions Ar, Kr and Xe with a fixed energy of 2.5 MeV/A. The cyclotron is equipped with external injection on the base of ECR ion source, a spiral inflector and the system of ion extraction consisting of an electrostatic deflector and a passive magnetic channel. The results of calculations of the beam dynamics in measured magnetic field from the exit of the spiral inflector to the correcting magnet located outside the accelerator vacuum chamber are presented. It is shown that the design parameters of ion beams at the entrance of the correcting magnet will be obtained using a false channel, which is a copy of the passive channel, located on the opposite side of the magnetic system. Extraction efficiency of ions will reach 75%.

E13-2013-122 (873.197)
Batusov V. et al.
The Laser Reference Line Method and Its Comparison to a Total Station in an ATLAS-Like Configuration

A new type of measuring system, the Laser Reference Line (LRL), is proposed as a metrological tool and can be used within limited space to ensure a precise installation along an axis on the ATLAS interaction point. A simplified ATLAS-like beam-pipe mock-up is used for this test. The coordinates of the beam pipe are measured three times using the new method and a Total Station. The measurements agree within the measurement error of the Total Station, which indicates that the precision of the laser reference line is suitable for this specific task in the ATLAS experiment.

E13-2013-123 (2.135.586)
Budagov J. et al.
A Laser-Based Fiducial Line for High-Precision Multipoint Alignment System

The next generation of linear colliders is very demanding concerning the alignment tolerances of their components. For the CLIC project, the reference axis of the components will have to be pre-aligned within 10 m at 1 sigma with respect to a straight line in a sliding window of 200 m. A solution based on stretched wires with wire positioning sensors has been proposed in order to fulfill the alignment requirements in the Conceptual Design Report of the project. This solution has some drawbacks and laser-based alternative solutions are under study in order to validate the wire solution and possibly replace it. A new proposal is introduced in this paper, using a laser beam over 150 m as a straight alignment reference, with the objective of having an uncertainty in the determination of its straightness within 10 m. Sensors, coupled to the components to be aligned, would provide after calibration the horizontal and vertical offsets with respect to the laser beam, within a few micrometers, in their coordinate system. The method is based on the laser beam space stabilization effect when a beam propagates in atmospheric air inside a pipe with standing acoustic wave. The principal schemes of corresponding optoelectronics devices and temperature stabilization solutions are also proposed, making probable the extension of the laser fiducial line up to a 500 m length.

E13-2013-124 (2.164.298)
Budagov J. et al.
Air Temperature Stabilization in the Thermally Isolated Optical Laboratory

For the studies and calibration of optoelectronic components of the high-precision laser-based metrology systems, a large volume (50 m3) thermoisolated lab based on a seismic isolated concrete block has benn created. The inside lab volume temperature stabilization for the daily observation at 16.5 is 0.05 with 0.015 temperature difference between maximal space separated points. This work was initiated by the needs of high-precision alignment of accelerator components of the CLIC, ILC-type colliders.

P9-2013-125 (207.467)
Gikal B.N. et al.
The Correction of Vertical Shifting of the Extracted Beam at the Test Operation of DC-110 Cyclotron

The specialized heavy ion cyclotron DC-110 has been designed and created by the Flerov Laboratory of Nuclear Reactions of the Joint Institute for Nuclear Research for scientifically industrial complex BETA placed in Dubna (Russia). DC-110 cyclotron is intended for accelerating the intense Ar, Kr, Xe ion beams with fixed energy of 2.5 MeV/nucleon. The commissioning of DC-110 cyclotron has been carried out at the end of 2012. The project parameters of the ion beams have been achieved. During commissioning of cyclotron the vertical displacement of the beam at the last orbits and at the extraction channel was revealed. The calculations and experiments have shown that the reason of this displacement is the radial component of magnetic field at the median plane of the cyclotron, which appears because of asymmetry of the magnetic yoke. Correction of the vertical displacement of the beam has been achieved by creating an asymmetry of current distribution in the main coils of the electromagnet.

P7-2013-126 (148.746)
Gikal B.N. et al.
Neutron Yield at an Irradiation of Constructional Metals by Heavy Ions with Energy 2.5 MeV/nucleon

On the cyclotrons CYTRACK and DC-110 neutron yield is measured at an irradiation of constructional metals and a polymeric film by Ar, Kr and Xe ions with energy of 2.4 and 2.5 MeV/nucleon. The angular distributions of neutrons from the target are measured. Program code of LISE++ is used for analysis and extrapolation of the obtained experimental data. The program code has been tested on the experimental data found in the literature. As a result of the comparison it is established, that results of calculation coincide with experimental data within difference factor of 2.

D13-2013-127_rus (2.814.568)
Alekseev I. et al.
DANSSino: A Pilot Version of the DANSS Neutrino Detector

DANSSino is a reduced pilot version of a solid-state detector of reactor antineutrinos (to be created within the DANSS project and installed under the industrial 3 GW reactor of the Kalinin Nuclear Power Plant - KNPP). Numerous tests performed at a distance of 11 m from the reactor core demonstrate operability of the chosen design and reveal the main sources of the background. In spite of its small size (20 20 100 cm), the pilot detector turned out to be quite sensitive to reactor antineutrinos, detecting about 70 IBD events per day with the signal-to-background ratio of about unity.

D13-2013-127_eng (2.069.967)
Alekseev I. et al.
DANSSino: A Pilot Version of the DANSS Neutrino Detector

DANSSino is a reduced pilot version of a solid-state detector of reactor antineutrinos (to be created within the DANSS project and installed under the industrial 3 GW reactor of the Kalinin Nuclear Power Plant - KNPP). Numerous tests performed at a distance of 11 m from the reactor core demonstrate operability of the chosen design and reveal the main sources of the background. In spite of its small size (20 20 100 cm), the pilot detector turned out to be quite sensitive to reactor antineutrinos, detecting about 70 IBD events per day with the signal-to-background ratio of about unity.

E15-2013-128 (302.069)
Testov D., Kuznetsova E., Wilson Jh.
Simulations for the Neutron Detector TETRA with MCNP

To study the nuclear structure of -delayed neutron precursors at ALTO ISOL-facility at IPN (Orsay), the high efficiency 4 neutron detector TETRA with 3He filled counters built at JINR (Dubna) was modified. The MCNP simulations to optimize the future configuration were necessary. The details of the calculations and the major results obtained are discussed.

P18-2013-129 (638.445)
Arzumanyan G.M. et al.
Up-Conversion Luminescence of Oxyfluoride Glasses and Nano-glass-ceramics Based on Them, Doped with Er3+ and Er3+/Yb3+ Ions: Spectral and Structural Characteristics

The paper is devoted to the study of spectral and structural characteristics of up-conversion luminescent (UCL) transparent oxyfluoride glass materials doped with rare earth elements Er3+ and Er3+/Yb3+. Excited with the 980 nm laser, green, red and near IR UCL bands were registered for all samples under study, both before and after their heat treatment. In the heat treated samples the intensity of the up-conversion increased significantly due to the formation of nano-crystalline phase of lead fluoride PbF2 in a glass matrix (nano-glass-ceramics). The structural analysis of the samples conducted with the method of small-angle neutron scattering (SANS) and the X-ray diffraction analysis (XRD) showed the cluster organization of nanocrystals of PbF2 in heat treated samples.

E1-2013-130 (229.112)
Janek M. et al.
GEANT4 Simulation of dp Non-mesonic Breakup Reaction at 300 and 500 MeV

GEANT4 simulations of the reaction dp ppn, i.e. the dp non-mesonic breakup reaction, at 300 and 500 MeV of deuteron energy for different detector configurations are presented. Two threads made from polyethylene and carbon with the thickness of 10 m are used as targets. The goal of the simulations is to find a method by means of which the signal from the dp non-mesonic breakup can be separated from the background that mainly comes from the carbon content of the CH2 target. The obtained results will be used in the experimental spin program that will be realized at the Nuclotron in Dubna. The aim of this experimental investigation is to contribute to the elucidation of the structure of the spin-dependent parts of the nucleon-nucleon and three-nucleon forces acting in the dp non-mesonic breakup. The deuteron energies will be ranging from 300 up to 500 MeV.

E14-2013-131 (111.664)
Eze Ch.P. et al.
Elemental Composition of Coal Fly Ash: Matla Coal Power Station in the Mpumalanga Province in South Africa Case Study Using Nuclear and Related Analytical Techniques

Epithermal neutron activation analysis along with ICP-OES, LA ICP-MS, and XRF were used to determine the elemental composition of coal fly ash from the Malta coal power station in the Mpumalanga province of South Africa. A total of 54 major, trace and rare-earth elements were obtained by the four analytical techniques. The results were compared and the discrepancies discussed to show the merits and drawbacks of each of the techniques. It was shown that the elemental content of this particular coal fly ash are of the same order as the NIST standard reference material Coal Fly Ash 1633b.

P18-2013-132 (3.107.585)
Aleksakhin V.Yu. et al.
Detection of Diamonds in Kimberlite by Tagged Neutron Method

Innovation technology for diamond detection in kimberlite based on the tagged neutron method is proposed. The results of experimental researches on irradiation of kimberlite samples with fast tagged neutrons with energy 14.1 MeV are discussed. The source of tagged neutron flux is a portable neutron generator with a built-in 64-pixel silicon alpha detector with double-sided stripped readout. Characteristic gamma rays produced as a result of inelastic neutron scattering on nuclei of chemical elements included in the composition of kimberlite are registered by six gamma-ray detectors based on BGO crystals. The criterion for diamond presence is an increased carbon concentration within the certain volume of kimberlite sample.

E4-2013-133 (190.849)
Severyukhin A.P. et al.
Complex Configuration Effects on -Decay Rates

Starting from the separabelized Skyrme interaction we study the influence of the coupling between one- and two-phonon terms in the wave functions and the tensor force effects on properties of Gamow-Teller states. We observe a redistribution of the GT strengths due to the tensor correlation influence on the 2p-2h fragmentation of GT states. The --decay half-lives are decreased by these effects. As an example, we describe available experimental data for the N = 50 isotones and give predictions for 76Fe which is important for stellar nucleosynthesis.

E2-2013-134 (365.938)
Contrera G.A., Grunfeld A.G., Blaschke D.B.
Phase Diagrams in Nonlocal Polyakov-Nambu-Jona-Lasinio Models Constrained by Lattice QCD Results

Based on lattice QCD-adjusted SU(2)f nonlocal Polyakov-Nambu-Jona-Lasinio (PNJL) models, we investigate how the location of the critical endpoint in the QCD phase diagram depends on the strength of the vector meson coupling, as well as on the Polyakov-loop (PL) potential and the form factors of the covariant model. The latter are constrained by lattice QCD data for the quark propagator. The strength of the vector coupling is adjusted so as to reproduce the slope of the pseudocritical temperature for the chiral phase transition at low chemical potential extracted recently from lattice QCD simulations. Our study supports the existence of a critical endpoint in the QCD phase diagram albeit the constraint for the vector coupling shifts its location to lower temperatures and higher baryochemical potentials than in the case without it.

E11-2013-137 (264.643)
Akishina T.P., Ivanov V.V., Stepanenko V.A.
Massive Calculations of Electrostatic Potentials and Structure Maps of Biopolymers in a Distributed Computing Environment

Among the key factors determining the processes of transcription and translation are the distributions of the electrostatic potentials of DNA, RNA and proteins. Calculations of electrostatic distributions and structure maps of biopolymers on computers are time consuming and require large computational resources. We developed the procedures for organization of massive calculations of electrostatic potentials and structure maps for biopolymers in a distributed computing environment (several thousands of cores).

E2-2013-139 (569.158)
Aparin A.A., Tokarev M.V.
Self-Similarity of Low-pT Cumulative Pion Production in Proton-Nucleus Collisions at U70

The data on inclusive momentum spectra of mesons produced in p + A collisions over the range pL = 15-65 GeV/c and lab = 159 at U70 are analyzed in the framework of z-scaling approach. Self-similarity of the pion production in the low-pT cumualtive region is verified. Scaling function (z) for Be, C, Al, Ti, Mo, W nuclei is constructed. It is expressed via the invariant cross section and the average multiplicity density of charged particles. Results of the analysis are compared with data obtained by J.Cronin, R.Sulyaev, and D.Jaffe groups at pL = 70, 400 GeV/c, pT > 1 GeV/c and cms 90. A microscopic scenario of p + A interactions in terms of momentum fractions x1, x2 is discussed. Indication of self-similarity of the low-pT cumulative pion production in p + A collisions was found. Universality of the shape of the scaling function is used to predict inclusive cross sections of + and - pions produced in p + A collisions on Be, C, Al, Ti, Mo, W targets in the deep-cumulative region (x2 1/A).

P9-2013-140 (2.278.148)
Averichev A.S. et al.
Results of the 46th and 47th Nuclotron Runs

The 46th Nuclotron run was performed from 15 November to 24 December, 2012, the 47th run - from 20 February to 28 March, 2013. As a result of works for energy increase, the deuteron beam was accelerated up to 5.1 GeV/u, the slow beam extraction was realized at 4.8 GeV/u. Investigations of stochastic cooling were prolonged in the framework of RD works for the NICA collider. Cooling of the longitudinal degree of freedom of the circulating beam was obtained during run No.47. Experimental segment of the NICA automatic control system based on Tango concept was put into the test operation. These and other results of the machine development shifts are presented in this report.

E13-2013-141 (353.044)
Afanaciev K. et al.
Response of LYSO:Ce Scintillation Crystals to Low-Energy Gamma Rays

The LYSO crystals with dimensions of 30 30 130 mm and 10 10 10 mm are tested with different gamma sources. Energy resolution and linearity of the energy response in the energy range of 511-1333 keV are measured. It is found that crystals have good linearity of the energy response in the entire tested energy range. Longitudinal light response nonuniformity of the long crystal is found to be less than 3.2% within the 30-120 mm range along the crystal axis.



up