

Physics of Elementary Particles and Atomic Nuclei

Archive (1970  2017)  Editorial board  Guidance for Authors 
Part 1  up 
Kamenshchik A. Yu., Pozdeeva E. O., Tronconi A., Venturi G., Vernov S. Yu. Integrable Cosmological Models in the Einstein and in the Jordan Frames and 

Kassandrov V. V., Rizcallah J. A. Selfdual Connections and the Equations of Fundamental Fields in a WeylCartan Space (rus, 92.561) 

Kostenko B. F. On Application of the Snyder Theory to Macroscopic Objects (35.776) Abstracts 

Obukhov Yu. N., Silenko A. J., Teryaev O. V. Dirac Particle in Riemann–Cartan Spacetimes (39.789) Abstracts 

Alexakhin V., Andreev V., Golutvin I., Zarubin A. Simulations for CMS Hadron Endcap Calorimeter Upgrade at HLLHC (40.159) Abstracts 

Belyaev N., Krasnopevtsev D., Smirnov N. Study of Performance of the ATLAS Transition Radiation Tracker in Run 1 of the LHC: Tracking Characteristics (rus, 105.048) 

Bezzubov V. A., Vasilyev I. A., Goryachev V. N., Denisov S. P., Evdokimov V. N., Erin S. V., Kozelov A. V., Levin A. V.,
Lipaev V. V., Stoyanova D. A., Shchukin A. A. Study of the Scintillation Counter Characteristics in the Relativistic Particle Beam (rus, 131.995) 

Dzaparova I. M., Volchenko V. I., Gangapshev A. M., Gorbacheva E. A., Kurenya A. N., Petkov V. B.,
Sergeev A. V., Yanin A. F. Scintillation Detector with SiPMs Matrix as Photosensor (rus, 154.979) 

Ershov A. A., Gribushin A. M., Demianov A. I., Kaminsky A. A. Neutron Field and Radiation Shielding Efficiency Measurement and Luminosity Control with the HF RADMON System of the CMS (rus, 347.600) 

Fedotov S. A., Kleymenova A. A., Khotjantsev A. N. New CHOD Detector of NA62 Experiment (CERN) (rus, 3.072.579) 

Finogeev D. A., Kurepin A. B., Razin V. I., Reshetin A. I.,
Usenko E. A., Barnyakov A. Yu., Barnyakov M. Yu., Bobrovnikov V. S.,
Buzykaev A. R., Kasyanenko P. V., Kononov S. A., Kravchenko E. A.,
Kuyanov I. A., Onuchin A. P., Ovtin I. V., Podgornov N. A.,
Talyshev A. A., Danilyuk A. F. Development of FARICH Detector for Particle Identification System on Accelerators (rus, 693.796) 

Gavrilov G. E., Andreev V. A., Krivshich A. G., Maisuzenko D. A., Fetisov A. A., Shvecova N. Yu. NonInvasive Method of Recovery of the Gas Discharge Detectors after Degradation in Intense Radiation Fields (rus, 694.967) 

Gavrilyuk Yu. M., Gangapshev A. M., Kazalov V. V., Kuzminov V. V.,
Panasenko S. I., Ratkevich S. S., Tekueva D. A. 2K2ν ^{124}Xe: Technique and Preliminary Results (rus, 108.578) 

Gavrin V. N., Gorbachev V. V., Ibragimova T. V., Kalikhov A. V., Shikhin A. A., Yants V. E. Registration System for ^{71}Ge Rare Decays in Proportional Counters for BEST Experiment (38.588) Abstracts 

Goryachev V. N., Denisov S. P., Kozelov A. V., Shchukin A. A. Characteristics of the 2MeterLong Scintillation Counters Measured with 90 MeV Protons (rus, 137.897) 

Gromushkin D. M., Bogdanov F. A., Lakhonin A. A., Petrukhin A. A.,
Stenkin Yu. V., Shchegolev O. B., Yurin K. O., Yashin I. I. Low Background EnDetector for Investigations of the Neutron Component of EAS (rus, 2.797.076) 

Kaminskiy V. V., Zhilich V. N., Muchnoi N. Yu. Energy Scale Calibration of KEDR Detector Tagging System (rus, 431.885) 

Karjavine V. Yu. on behalf of the CMS Collaboration Upgrade of the CMS Endcap Muon System (rus, 8.869.501) 

Khomyakov V. A., Bogdanov A. G., Kindin V. V., Kokoulin R. P.,
Petrukhin A. A., Khokhlov S. S., Shutenko V. V., Yashin I. I. The Research Technique of Cherenkov Radiation from Cascade Showers in Water (rus,288.369) 

Achasov M. N., Kupich A. S. Separation of Electrons and Pions Using SND Detector Calorimeter (rus, 111.903) 

Likhacheva V. L., Kudenko Yu. G., Mefodiev A. V., Mineev O. V., Khotjantsev A. N. Beam Test of Muon Counters for the Ship Experiment at CERN (rus, 92.850) 

Machikhiliyan I. on behalf of the DANSS Collaboration Reconstruction and Initial Calibration of the Response of Silicon Photomultipliers in the DANSS Experiment (rus, 118.614) 

Mandrik P. S. Methods of Statistical Analysis in Collider Experiments with Incorporating Different Types of Systematic and Statistic Uncertainties (rus, 79.950) 

Panteleev V. N., Barzakh A. E., Batist L. Kh., Volkov Yu. M.,
Ivanov V. S., Krotov S. A., Molkanov P. L., Moroz F. V., Orlov S. Yu., Fedorov D. V. Target Development for ^{82}Sr, ^{67}Ñu Radionuclide Production at the RIC80 Facility (rus, 103.681) 

Rezanova O. L. on behalf of the KEDR Collaboration Testing of the KEDR Detector Tagging System Using Events of TwoPhoton Muon Pair Production (rus, 173.234) 

Shcherbakov O. A., Vorobyev A. S., Ivanov E. M. Spallation Neutron Source GNEIS (rus, 1.034.592) 

Svirida D. for the DANSS Collaboration Electronics of the Data Acquisition System of the DANSS Detector Based on the Silicon Photomultipliers (rus, 530.815) 

Zadeba E. A., Barbashina N. S., Borisov A. A., Volkov N. S., Kozhin A. S., Kokoulin R. P.,
Kompaniets K. G., Ovechkin A. S., Ovchinnikov V. V., Petrukhin A. A., Fakhrutdinov R. M., Yashin I. I. Application of Multiwire Drift Chambers for Registration of Ultrahigh Energy Cosmic Rays (rus, 1.948.166) 

Baklagin S. A., Dzhatdoev T. A., Kircheva A. P., Lukshin A. A., Khalikov E. V. Cascades from Primary Gamma Rays and Nuclei as a Source of Background in the Search for Photon to AxionLike Particle Oscillation (rus, 124.455) 

Gavrilyuk Yu. M., Gangapshev A. M., Derbin A. V., Kazalov V. V.,
Kuzminov V. V., Muratova V. N., Panasenko S. I., Ratkevich S. S.,
Tekueva D. A., Unzhakov E. V., Yakimenko S. P. Second Stage of Experiment to Search for Resonant Absorption of Solar Axions Emitted via M1Transition in ^{83}Kr Nuclei (rus, 124.784) 

Kochkarov M. M., Boliev M. M., Dzaparova I. M.,
Novoseltseva R. V., Novoseltsev Yu. F., Petkov V. B., Volchenko V. I., Volchenko G. V., Yanin A. F. Neutron Flux Measurement at the Baksan Underground Scintillation Telescope (rus, 135.922) 

Kokoulin R. P., Bogdanov A. G., Barbashina N. S., Dushkin L. I.,
Kindin V. V., Kompaniets K. G., Mannocchi G., Petrukhin A. A.,
Saavedra O., Trinchero G., Khomyakov V. A., Khokhlov S. S., Chernov D. V., Shutenko V. V., Yurina E. A., Yashin I. I. NEVODDECOR Experiment on Investigation of the Energy Deposit of Muon Bundles in Inclined EAS (rus, 129.625) 

Kondratyev V. N., Korovina Yu. V. Universal Statistics of Soft GammaRay Repeating (SGR) Bursts (rus, 114.706) 

Panasyuk M.I., Lipunov V. M., Pack Il, Svertilov S. I.,
Bogomolov V. V, Gorbovskoy E. S., Amelyushkin A. M., Bogomolov A. V., Iyudin A. F., Kuznetsova E. A., Petrov V. L.,
Rozhkov G. V., Yashin I. V. Set of Detectors Designed to Study GammaRay and Optical Emission of Cosmic GammaRay Bursts Onboard «Lomonosov» Satellite (rus, 1.138.868) 

Petkov V. B. Isotropic Neutrino Flux from All Supernovae in the Universe (rus, 114.440) 

Pokrovsky Yu. E. Compact Clumps of Dark Matter Near the Solar Surface (43.043) Abstracts 

Uchaikin V. V., Sibatov R. T. On Propagators of Nonlocal Relativistic Diffusion of Galactic Cosmic Rays (rus, 124.026) Abstracts 

Part 2  up 
Jolos R. V., Kartavenko V. G., Kolganova E. A. Isovector Pair Correlations of Nucleons in Atomic Nuclei: Microscopic Approach, Boson Representation and Collective Model (rus, 446.881) Pair correlations of nucleons in atomic nuclei are analyzed in the framework of the microscopic nuclear model with isovector pairing. The method of the boson representations of the fermion operators is used for this aim. The method gives a possibility to determine a collective mode of the pair excitations without restricting a single particle basis. Using this method it is possible to consider fluctuations of the nonsuperfluid nuclear matter, phase transition from nonsuperfluid to superfluid system and strong pair correlations. The consideration is illustrated by the results of calculations obtained for nuclei around ^{56}Ni. 

Saha B. Spinor Field Nonlinearity and SpaceTime Geometry (rus, 1.115.807) Within the scope of Bianchi typeVI, VI_{0}, V, III, I, LRSBI and FRW cosmological models we have studied the role of nonlinear spinor field in the evolution of the Universe and the field itself. It was found that due to the presence of nontrivial nondiagonal components of the energymomentum tensor of the spinor field in the anisotropic spacetime, there occur some severe restrictions both on the metric functions and on the components of the spinor field. In this report we have considered a polynomial nonlinearity which is a function of invariants constructed from the bilinear spinor forms. It is found that in case of a Bianchi typeVI spacetime, depending on the sign of selfcoupling constants, the model allows either late time acceleration or oscillatory mode of evolution. In case of a Bianchi typeVI_{0} spacetime due to the specific behavior of the spinor field we have two different scenarios. In one case the invariants constructed from bilinear spinor forms become trivial, thus giving rise to a massless and linear spinor field Lagrangian. This case is equivalent to the vacuum solution of the Bianchi typeVI_{0} spacetime. The second case allows nonvanishing massive and nonlinear terms, and depending on the sign of coupling constants, gives rise to accelerating mode of expansion or the one that after obtaining some maximum value contracts and ends in big crunch, consequently generating spacetime singularity. In case of a Bianchi typeV model there occur two possibilities. In one case we found that the metric functions are similar to each other. In this case the Universe expands with acceleration if the selfcoupling constant is taken to be a positive one, whereas a negative coupling constant gives rise to a cyclic or periodic solution. In the second case the spinor mass and the spinor field nonlinearity vanish and the Universe expands linearly in time. In case of a Bianchi typeIII model the spacetime remains locally rotationally symmetric all the time, though the isotropy of spacetime can be attained for a large proportionality constant. As far as evolution is concerned, depending on the sign of coupling constant the model allows both accelerated and oscillatory mode of expansion. A negative coupling constant leads to an oscillatory mode of expansion, whereas a positive coupling constant generates expanding Universe with late time acceleration. Both deceleration parameter and EoS parameter in this case vary with time and are in agreement with modern concept of spacetime evolution. In case of a Bianchi typeI spacetime the nondiagonal components lead to three different possibilities. In case of a full BI spacetime we find that the spinor field nonlinearity and the massive term vanish, hence the spinor field Lagrangian becomes massless and linear. In two other cases the spacetime evolves into either LRSBI or FRW Universe. If we consider a locally rotationally symmetric BI (LRSBI) model, neither the mass term nor the spinor field nonlinearity vanishes. In this case depending on the sign of coupling constant we have either late time accelerated mode of expansion or oscillatory mode of evolution. In this case for an expanding Universe we have asymptotical isotropization. Finally, in case of a RW model neither the mass term nor the spinor field nonlinearity vanishes. Like in LRSBI case we have either late time acceleration or cyclic mode of evolution. These findings allow us to conclude that the spinor field is very sensitive to the gravitational one. 

Karshenboim S. G. Determination of the Fundamental Physical Constants: The Base of the New “Quantum” SI Units (rus, 1.093.194) The metric system of units has appeared as a system of units, designed for macroscopic measurements (of the laboratory scale). Progress in determination of the values of the quantum constants (such as the Planck constant) in SI units proves the increased possibilities of highprecision measurements of both microscopic and macroscopic quantities in the same units. In the meantime, the relative microscopic measurements (such as comparison of the frequencies of atomic transitions or comparison of atomic masses) are often significantly more accurate than the relative measurements of macroscopic values. That motivates a strategy of defining units in the microscopic phenomena and their further use in measurements of the laboratory scale, which play a crucial role in practical metrological applications, determined by the everyday life and technologies. CODATA task group on fundamental constants regularly performs an overall analysis of the precision world data (known as least square adjustment) and publishes their recommended values. The most recent evaluation of this sort was based on the data published by the end of 2014 and here we review the related data and results. The accuracy in determination of the Boltzmann constant has increased and the consistency of the data on the determination of the Planck constant has improved, while these two constants are going to be the base of the new definition of the kelvin and kilogram in the near future. The controversy in determination of the Rydberg constant and the proton charge radius remains. Accuracy of the determination of the fine structure constant and relative atomic weight of the electron has been improved. A detailed review of the state of the art in precision determination of the values of fundamental constants is presented. The mathematical procedure of the adjustment is considered as well as the new data and the results. Limitations due to macroscopic properties of material standards (such as the international prototype of the kilogram) and the isotopic composition of substances involved in precision studies in general (such as the standard measures for the triple point of water) and, in particular, in the determination of fundamental constants are treated. The perspectives of the introduction of the new quantum units, which will be free of the mentioned problems, are discussed. Many physicists feel no sympathy to the International System of Units (SI), suggesting that it does not properly reflect the character of physical laws. There are in fact three parallel systems, namely, the system of quantities, system of their units and the related standards. Definition of the units, and in particular of the SI units, at the first place reflects our ability to perform precision measurements of physical values under certain conditions, and in particular to build the appropriate standards. This requirement is not related to the beauty of fundamental natural laws. The determination of the fundamental constants is one of the areas where we accumulate such an experience. 

Gurov Yu. B., Lapushkin S. V., Sandukovsky V. G., Chernyshev B. A. Multilayer Semiconductor Spectrometers of Charged Particles for Accelerator Experiments (rus, 3.254.893) The current state of development in the field of multilayer semiconductor systems (SCD telescopes) is presented. It has been shown that these telescopes make it possible to have a high energy resolution in a large dynamic range (from several to hundreds of MeV) and identification of detecting charged particles in a wide range of masses (from pions to multiply charged nuclear fragments). The manufacturing methods of detectors from silicon and HP germanium for SCD telescopes are described. The methods of measuring the characteristics of the detectors and their impact on the energy resolution of the telescope spectrometers and the quality of the experimental data are presented. Considerable attention is paid to the use of multilayer semiconductor devices in the experimental studies on accelerators of PNPI (Gatchina), LANL (Los Alamos) and CELSIUS (Uppsala). 

Kozhevnikov S. V., Ott F., Radu F. Neutron Methods for the Investigations of Magnetic Films (rus, 5.281.185) We review neutron methods for the investigations of magnetic films: Larmor precession, Zeeman spatial beamsplitting, neutron spin resonance, and polarized neutron channeling. The basic principles of the methods and examples of investigated systems are presented. The features and possibilities of the neutron methods are discussed. 

Part 3  up 
Bednyakov V.A., Russakovich N.A. Joint Institute for Nuclear Research in Experimental Particle Physics (rus, 22.531.378) In 2016 the Joint Institute for Nuclear Research in Dubna, an international intergovernmental organization in the field of fundamental physics of elementary particles, atomic nuclei and condensed matter, celebrated 60 years since its foundation. A rather long and very effective route of development was fulfilled, looking back at which it becomes clear that internationality and multidisciplinarity of scientific research is the guarantee of successful development (and preservation) of fundamental science. This observation was especially relevant in the experimental field of research.In the review, based on a brief description of the most important results achieved at JINR, an attempt was made to look (710 years) into the future and to foresee the Institute's place in solving the important modern problems of elementary particle physics, which is the most fundamental field of modern natural science. This glance into the future is full of reasonable optimism. 

Chervyakov A., Kleinert H. On Electron–Positron Pair Production by a Spatially Inhomogeneous Electric Field (54.774) Abstracts A detailed analysis of electron–positron pair creation induced by a spatially nonuniform and static electric field from vacuum is presented. A typical example is provided by the Sauter potential. For this potential, we derive the analytic expressions for vacuum decay and pair production rate accounted for the entire range of spatial variations. In the limit of a sharp step, we recover the divergent result due to the singular electric field at the origin. The limit of a constant field reproduces the classical result of Euler, Heisenberg and Schwinger, if the latter is properly averaged over the width of a spatial variation. The pair production by the Sauter potential is described for different regimes from weak to strong fields. For all these regimes, the locally constantfield rate is shown to be the upper limit. 

Silantyev A.V. Reflection Functor in the Theory of Representations of Preprojective Algebras for Quivers, and Integrable Systems (rus, 598.512) The theory of representations of quivers and their (deformed) preprojective algebras is reviewed. In particular, moduli spaces of representations of these algebras, quiver varieties and reflection functor are described. It is proved that the bijection between moduli spaces (and, in particular, between the quiver varieties) induced by the reflection functor is an isomorphism of symplectic affine varieties. Hamiltonian systems on quiver varieties are defined. Application of the reflection functor to these systems is described. The results of [1] on the case of cyclic quiver are reviewed and a role of the reflection functor in this case is discussed. In particular, “spin” integrable generalisations of the Calogero–Moser systems and their application to the generalised KP hierarchies are described. 

Dubinov A.E., Ochkina E.I. Electron AcceleratorsRecirculators with NonCircular Electron Orbits for Radiation Applications (rus, 10.710.433) Review of modern compact electron acceleratorsrecirculators at the intermediate energies of acceleration (tens of MeV) is presented. The schemes of electrons acceleration in rhodotron, ridgetron, fantron, and cylindertron are analyzed. The main elements of the accelerators (electron guns, accelerating cavities, and bending magnets) are described. The parameters of the acting accelerators are provided. The examples of application of the electron acceleratorsrecirculators in different radiation processes are presented. 
V. A. Matveev
V. L. Aksenov, Nguen Van Hieu
A. B. Arbuzov,
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A. A. Starobinskii,
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Gh. Stratan,
G. V. Trubnikov,
V. I. Yukalov
G. V. Fedorova
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G. I. Smirnov