2304-9782, 2618-8686, 2405-7223 3 153 2012

RAR RUS 9-15 Peter the Great St. Petersburg Polytechnic University Vinnichenko Maxim mvin@spbstu.ru J-6066-2013 35403302800 0000-0003-3947-4994 Peter the Great St. Petersburg Polytechnic University Firsov Dmitry firsov.da@spbstu.ru

Russia, 195251, St.Petersburg, Polytechnicheskaya, 29

Mashko Marina mashkomaro@yandex.ru Shterengas Leon Belenky Gregory Vorobjev Leonid Electron recombination and capture in laser nanostructures with InGaAsSb/AlGaAsSb quantum wells Time dynamics of photoluminescence intensity was studied in InGaAsSb/AlGaAsSb quantum wells with different compositions of the barrier solid solution. The charge carrier capture time in quantum wells, the energy relaxation times, the lifetime related to resonant Auger recombination were estimated. It was shown that under certain design of nanostructures the resonant Auger recombination can be observed. The influence of temperature and structure design on the Auger recombination rate is discussed. 535.3 laser radiation mid infrared range quantum wells auger recombination https://physmath.spbstu.ru/article/2012.16.1/

RAR RUS 15-21 Shaganov Anton shaganovanton@gmail.com 0000-0002-2793-5717 Peter the Great St. Petersburg Polytechnic University Filimonov Alexey filimonov@rphf.spbstu.ru

St. Petersburg, Russian Federation

Ioffe Institute, RAS Koroleva Ekaterina e.yu.koroleva@mail.ioffe.ru AAD-9657-2019 57197390995 Peter the Great St. Petersburg Polytechnic University Fotiadi Alexander fotiadi@rphf.spbstu.ru

Russia, 195251, St.Petersburg, Polytechnicheskaya, 29

The formation of polar nanoregions and nanodomains in SBN-61 single-axis relaxors The paper is devoted to application of a synchrotron radiation scattering method to the analysis of domain structure ofSr0.6Ba0.4Nb2O6 (SBN) samples. It is experimentally established that at high temperature there are polarizing centers of the varied size in the SBN-61 samples, with center distances down to the units of micron. Domain structure formation in SBN-61 is accompanied by partial disordering caused by increasing of polarization fluctuations. The polarization in the volume of the samples in question was correlated, and a direction of preferred correlation can change depending on the general ordering. 538.913: 620.22 - 022.53 synchrotron radiation relaxor domain structure polarizing centers polarization fluctuations https://physmath.spbstu.ru/article/2012.16.2/

RAR RUS 22-28 Yurova Valentina va-yurova@mail.ru Fedortsov Alexander vecher@nwpi.ru Klimchitskaya Galina g_klimchitskaya@mail.ru Churkin Yuri physics@nwpi.ru The Casimir force pressure onthe dielectric layer in nanoscale solid-state multilayer Al - SiO2 - Si structures The calculation of the dispersion forces pressure value on the dielectric layer in solid-state multilayer Al - SiO2 - Sistructure widely used in electronic components production is presented. It is shown that the pressure increases sharply in the nanometer range of the dielectric thickness and at the thickness of 1 nm reaches the value of 8 MPa. The calculation results do not depend on the dielectric permittivity model of the structure matters. 53.043, 539.196.3 dispersion force pressure Casimir effect metall - dielectric - semiconductor structure Lifshitz theory permittivity https://physmath.spbstu.ru/article/2012.16.3/

RAR RUS 28-31 Lamkin Ivan IALamkin@mail.ru Menkovich Ekaterina ankat.kate@gmail.com Tarasov Sergey SATarasov@mail.ru Ultraviolet photodiodes on the basis of the contactsof metal and aluminum-nitride gallium solid solutions The paper considers the problem of creating high-quality ohmic and rectifying contacts to AlGaN solid solutions with a high degree of Al. The basic problems connected with creating ultraviolet photosensitive structures based on the contact metal - AlGaN solid contacts are presented. 621.315.592 UV photodetector AlGaN ohmic contacts Schottky barrier https://physmath.spbstu.ru/article/2012.16.4/

RAR RUS 31-36 Radchuk Natalia radchukn@gmail.com Ushakov Alexander ushakov@rphf.spbstu.ru Optical properties of transition metals nanocomposites The paper contains results of investigation of transition metals nanocomposites on the basis of arabinogalactan. Absorption spectra, optical activity and methods of nanocomposites synthesis are considered. 674.032.14 nanocomposites arabinogalactan nickel cobalt zinc absorption spectra optical activity plasmon resonance https://physmath.spbstu.ru/article/2012.16.5/

RAR RUS 36-44 Kvashenkina Olga kvol.spbspu@gmail.com Features of electronic phase transition in VO2 The details of several stages of the thermal metal-semiconductor phase transition (MSPT) in vanadium dioxide films are experimentally studied. The idea of a joint and coherent coexistence of the two components of MSPT - the electronic and structural components - is substantiated. The problem of the type of metal-semiconductor phase transition in vanadium dioxide is discussed. 538.9 vanadium dioxide phase transition Mott transition Peierls transition thin films hysteresis dimers https://physmath.spbstu.ru/article/2012.16.6/

RAR RUS 45-48 Basalkevich Tatiana busta.88@mail.ru Talnishnikh N.A. Nadya.FEL@mail.ru Shmidt Natalia Development features of degradation processes in high-power blue InGaN/GaN light-emitting diodes The paper describes the features of degradation processes, the current-voltage characteristics, electroluminescence spectra and external quantum efficiency. The reasons for the rapid development of degradation processes in high-power blue InGaN /GaN light-emitting diodes, complicating the prediction of their service life, are elucidated. 621.382.038 rapid degradation InGaN/GaN LEDs quantum efficiency current-voltage characteristics electroluminescence https://physmath.spbstu.ru/article/2012.16.7/

RAR RUS 48-55 Gonchar Igor goncharmail@gmail.com Ivanov A.S. physics@nwpi.ru Fedortsov Alexander vecher@nwpi.ru A fast-operating interferometry device for measuring films thickness over the range from ten to one thousand microns A fast-operating laser-interferometric device for measuring the thickness of films which are transparent in visible or infrared ranges is described in this work. The thickness of the films to be investigated is from 10 µm to 1 mm. Measuring frequency is 25 times per second, time of one measurement is 3·10-4 s. This allows measuring the thickness of unstable films including liquid ones. Due to combining two ways of determining the thickness in one device (by the number of peaks in the angular dependence of the laser beam reflectance coefficient, and by the value of this coefficient at a given angle of incidence) the error in determining the thickness is only 150 nm. 535.8.667.6 laser interferometry film thickness solid and liquid films https://physmath.spbstu.ru/article/2012.16.8/

RAR RUS 56-59 Zolotov Sergey 7006335646 Peter the Great St. Petersburg Polytechnic University Privalov Vadim kafedra@physics.spbstu.ru

Russia, 195251, St.Petersburg, Polytechnicheskaya, 29

The influence of active element geometry on gas discharge laser gain factor The article deals with new approaches to increase the gain factor of the laser on the He-Ne mixture by changing the geometry of the active element. The amplification gain and the optimum size of the combined sections of the active elements are calculated. 621.373.8 gas laser gain active element power optimization https://physmath.spbstu.ru/article/2012.16.9/

RAR RUS 59-64 Kovalevsky Dmitry dmitry.kovalevsky@niersc.spb.ru, d_v_kovalevsky@list.ru Effects of heterogeneity of potential barriers and lattice finiteness in the Kronig - Penney model Using the matrix formalism, the wave functions of continuum states and the energies of surface (Tamm) states are calculated in the modified Kronig - Penney model with a special geometry of the potential (an infinitely high potential barrier at the origin of the coordinates, bounding the region of electron motion to positive semi-axis; the height of the potential delta-barrier / the depth of the potential well closest to the origin of the coordinates differs from the height of all other barriers). Particular attention is paid to the case of size quantization in the lattice of finite length 538.915 electrons Kronig - Penney model surface states size quantization https://physmath.spbstu.ru/article/2012.16.10/

RAR RUS 64-70 P-6861-2015 10041592700 https://orcid.org/0000-0003-2511-0188 Karaseov Platon platon.karaseov@spbstu.ru 0000-0003-1770-1877 Peter the Great St. Petersburg Polytechnic University Karabeshkin Konstantin The features of defect formation in silicon under molecular ion bombardment Molecular effect in silicon under molecular ion bombardment over a wide energy range is described. Physical mechanisms for explanation of this phenomenon are suggested. Results of experimental studies and computer simulation of processes occurred in Si under Р+ and PF+4. ion bombardment are presented. 539.534.9 ion implantation silicon molecular effect collision cascade computer simulation https://physmath.spbstu.ru/article/2012.16.11/

RAR RUS 71-74 Kiesewetter Dmitry Savina Alla savall_07@mail.ru The approximation of Rhodamine dyes fluorescence spectra Using of different functions for approximation of spectra of fluorescence of Rhodamine has been put forward. The fluorescence spectra of solutions and Rhodamine doped polymeric fibers were measured at different temperatures. The accuracy of approximations was defined. 532.372.082.5: 628.953.2 fluorescence approximation spectrum polymer optical fiber temperature dependence https://physmath.spbstu.ru/article/2012.16.12/

RAR RUS 75-79 Peter the Great St. Petersburg Polytechnic University Yuhnev Andrey a.yukhnev@mail.ru Peter the Great St. Petersburg Polytechnic University Sinitsyna Darya sinicina.daria@yandex.ru The blood vessel models: the technology development for makingand following investigation Methods of making the human blood vessel silicon models are considered. The procedure for measurement of model andcarotid artery diameters under pulsating pressure of liquid is described. The results of compliant coefficients determinationare given. 625.855.3 blood flow phantom silicon blood vessel model wall thickness compliant coefficient ultrasound scanner https://physmath.spbstu.ru/article/2012.16.13/

RAR RUS 80-83 Lukashova Olga olga.lukashoa.best@gmail.com Mokrova Darya dashkeria@gmail.com Kafidova Galina gkafidova@gmail.com Perevoznik Dmitry piralta17@gmail.com A noninvasive speckle sensor of blood flow velocity in the microvasculature The peculiarities of a noninvasive speckle blood flow velocity sensor development have been considered. Functional elements within the structure of the sensor were optimized, that permitted to produce its mobile version. Also, Bluetooth radio channel, allowing transmitting informational signal to a personal computer for subsequent processing and storage, was included in the sensor e-frame. Experimental results of the sensor testing are presented. 681.784.8 speckle field microcirculation autocorrelation noninvasive sensor https://physmath.spbstu.ru/article/2012.16.14/

RAR RUS 83-91 E-4237-2014 12784708700 0000-0001-9050-4453 Peter the Great St. Petersburg Polytechnic University Kapralova Victoria kapralova2006@yandex.ru

Russia, 195251, St.Petersburg, Polytechnicheskaya, 29

Nazarova Elena elenanzrv@rambler.ru Ivanova Nataliya ivamel@mail.ru Shadrin Evgeniy shadr.solid@mail.ioffe.ru Albumin conformational changes as a diagnostic parameter Thermoimpedancemetric curves of human serum albumin aqueous solutions of various concentrations and pH are obtained. It is shown that the globule-coil transition in individual globules is observed and the curve shape reflects albuminconformational changes including changes under the different denaturants influence. The possibility of denaturation kinetics study by means of thermoimpedancemetry is demonstrated. Results obtained allow to expand diagnostic capabilities of cerebrospinal fluid thermoimpedancemetry on the conformational diseases. 577.322; 541.64:537.3 human serum albumin denaturation conformational diseases thermoimpedancemetry diagnostics https://physmath.spbstu.ru/article/2012.16.15/

RAR RUS 92-95 Khaiyrullin Andrey ahairullin@hotmail.com Stepanova Tamara t_stepanova2005@mail.ru Rozhkova Natalia geolog@krc.karelia.ru Gladchenko Svetlana Dipole moments of C60 fullerene in benzene, toluene and orthoxylene The determination of dipole moments of C60 fullerene has been carried out in benzene, toluene and ortoxylene solutionsunder infinite dilution. It was found that dipole moments are 1.0 D, 1.8 D and 2.27 D in toluene, benzene and ortoxylene, respectively. It means that there are isolated C60 molecules in toluene solution but associated clusters with constant stoichiometry in benzene and ortoxylene solutions. 537.226:544.163.2 dielectric permettivity dipole moment association solution C60 fullerene toluolene ortoxylene benzene https://physmath.spbstu.ru/article/2012.16.16/

RAR RUS 96-99 Peter the Great St. Petersburg Polytechnic University Berdnikov Alexander alexber@phmf.spbstu.ru

Russia, 195251, St.Petersburg, Polytechnicheskaya, 29

0000-0003-3298-3702 Peter the Great St. Petersburg Polytechnic University Ivanishchev Dmitry ivanishchev_da@pnpi.nrcki.ru 0000-0002-3395-0454 Peter the Great St. Petersburg Polytechnic University Kotov Dmitry dmitriy.kotov@gmail.com Ryabov Victor Ryabov Yuri Samsonov Vladimir The measurement of electromagnetical signs of quark-gluon plasma in heavy ion collisions at 62.4 GeV Dilepton spectra in Au+Au collisions at √SNN = 62.4 GeV and calculation of dilepton pair cocktail from known sources have been presented. 539.125.17; 539.126.17 quark-gluon plasma leptons production temperature analysis https://physmath.spbstu.ru/article/2012.16.17/

RAR RUS 99-110 Pavlov Fedor The calculation of matrix elements for the electromagnetic deuteron current in a formal light description cone The paper investigates the behavior of matrix elements for the electromagnetic deuteron as a function of the momentumtransfer. Matrix elements in question were calculated in the light cone formalism using the criteria for option of matrix elements for the plus-component of the electromagnetic current in the Breit frame. 539.128.2, 539.171.016 deuteron light cone matrix elements of the electromagnetic current Breit frame https://physmath.spbstu.ru/article/2012.16.18/

RAR RUS 111-118 Pavlov Fedor 0000-0003-0309-5917 Peter the Great St. Petersburg Polytechnic University Berdnikov Yaroslav berdnikov@spbstu.ru Angular condition for matrix elements of the electromagnetic deuteron current The paper is devoted to investigation of Grach-Kondratyuk angular condition. The matrix element of the «plus» component of the electromagnetic current of the deuteron defines four independent functions. Whereas, the matrix element should be expressed in three of the deuteron form factors: the charge, magnetic and quadrupole. This means that there must be additional equation. This equation is called the angular condition. The paper investigates the behavior of this condition as a function of the square of the momentum transfer, and shows its violation. 539.128.2, 539.171.016 deuteron light cone matrix elements of the electromagnetic current angular condition https://physmath.spbstu.ru/article/2012.16.19/

RAR RUS 118-123 0000-0003-0309-5917 Peter the Great St. Petersburg Polytechnic University Berdnikov Yaroslav berdnikov@spbstu.ru Ivanov Alexey alexey.ivanov86@gmail.com Kim Victor victor.t.kim@gmail.com Suetin Daniil suetindaniil@gmail.com Nuclear effects in hadron-nuclear interactions at high energies The process of hard interaction of hadrons with nuclei at high energies is studied, results of modeling of lepton pairs production in hadron-nuclear interactions in the Drell - Yan process are presented. Comparison with experimental data from E772 and E886 collaboration is carried out. Fine matching of HARDPING model with experiment is obtained. 539.125.17; 539.126.17 hadron-nuclear collisions multiple scattering energy losses hardping https://physmath.spbstu.ru/article/2012.16.20/

RAR RUS 124-128 Vishnevsky Vyacheslav Pustovalova Olga Ivanova Olga ddemidova@mail.ru Strecopitova Maria ddemidova@mail.ru The stability of the stationary polymeasure equilibrium regime The paper proves the theorems of the stability of the integral manifold of a system of differential equations and the asymptotic stability of the equilibrium regime of a system of differential equations. 517.929 regime function stability inequality family https://physmath.spbstu.ru/article/2012.16.21/

RAR RUS 128-132 Pervadchuk Vladimir pervadchuk@mail.ru Shumkova Daria shumkova_darya@mail.ru Dektyarev Dmitry Matters of solvability and derivation of optimization systems in variational problems described by two-dimensional parabolic equations In this paper we obtain conditions for the solvability of the optimal control of two-dimensional nonlinear equation of parabolic type. In this case the function of optimal control is determined explicitly and depends on the solution of the resulting optimality system. 517.97 optimal control partial differential equations system of optimality compromise control https://physmath.spbstu.ru/article/2012.16.22/

RAR RUS 133-135 Fedotov Alexey Alex3238024@yandex.ru Lisin Sergey Using of nonlinear minimization theory for applied problems of design of objects properties An analysis and a design of objects parameters and their properties have been carried out by application of the minimization theory procedure using experimental data and their restoring. The theory of the best estimation change was taken to extract validly the scientific and technical information from experiments. The strategies for regeneration of experimental dependencieswere developed by means of results representation, experiments deviations and other things. 621.314.571:51.080(045) nonlinear mathematical model numerical solution regressive functional approximation https://physmath.spbstu.ru/article/2012.16.23/

RAR RUS 136-144 Vasiliev Alexander a.n.vasilycv@gmail.com Tarkhov Dmitry dtarkhov@gmail.com Parametrical neural network models of classical and nonclassical problems for heat conduction equation Problems of mathematical modeling for complex systems are considered in the paper in terms of neural network technique. System parameters are given in some variation intervals. Neural network model of nonstationary temperature field inthe case of both classical and non-classical problem statement is cited as an example. Results of neurocomputing for accurate and noise data are given. 004.032.26+519.63:517.951 boundary value problem (bvp) interval parameter modeling artificial neural network training error functional global optimization https://physmath.spbstu.ru/article/2012.16.24/

RAR RUS 144-155 Nguyen Van thangspbstu@mail.ru Arseniev Dmitry Institute for Problems of Mechanical Engineering of RAS Belyaev Alexander 13augen@mail.ru The stability of motion of the shaft supported by floating ring bearings and its self-oscillation with allowance of lubrication hydrodynamics and centrifugal forces Our study gives the theoretical representation of the stability of the balance position of the shaft supported by floating ring bearing with allowance of lubrication hydrodynamics and centrifugal force. The basic results are referred to the shortbearing investigation. 621.822.171-251 centrifugal forces stability self-oscillation short bearing lubrication hydrodynamics https://physmath.spbstu.ru/article/2012.16.25/

RAR RUS 155-170 Zhgutov Vladimir abc.kitezh@gmail.com Geometrically nonlinear thermoplasticity mathematic models of shells with the variable thickness The mathematical deformation models of variable thickness shells (smoothly-variable anb ribbed shells), experiencing either mechanical load or permanent temperature field and taking into account the geometrical nonlinearity, nonlinearelasticity and transverse shear, were developed. There are given refined geometrical proportions for geometrically nonlinear and steadiness problems. 539.3 variable thickness shells (smoothly-variable and ribbed shells) thermoelasticity geometrical nonlinearity nonlinear elasticity transverse shear https://physmath.spbstu.ru/article/2012.16.26/

RAR RUS 171-181 Sanin Andrey andreylsanin@yandex.ru Semyonov E.A. seaman2003@tut.by Quantum Duffing oscillators: free and coupled, noise action The numerical integration of the non-stationary two-dimensional Schrödinger equation was carried out. In the context of quantum wave-packets, dynamical means, Fourier spectra, uncertainty relations, autocorrelators there were studied the dynamical properties for two coupled quantum Duffing oscillators. It is shown that synchronization for identical oscillatorsand partial transmission of the frequency spectrum in non-identical oscillators takes place. It was found that increasing of noise power leads to the amplitude reduction of the complex-shaped oscillations and the expansion of the frequency spectra. 530.145 quantum Duffing oscillators coupling synchronisation noise spectra https://physmath.spbstu.ru/article/2012.16.27/

RAR RUS 182-190 Peter the Great St. Petersburg Polytechnic University Apushkinsky Evgeniy apushkinsky@hotmail.com Nonlinear signal spectra transformations Echo formation occurs in media consisting of many individual oscillators which are able to interact with the external exciting field and have slightly different frequencies. Each this oscillator is considered as a quadripole transforming the input signals. We show that the delay operation with some conversion of the signals will be carried out if each quadripole transforming, has a nonlinearity, in which the spectrum of its output is connected to the spectrum of the input signal through a nonlinear transformation. 530.182 echo signals nonlinear transformation of the spectra nonlinear oscillators https://physmath.spbstu.ru/article/2012.16.28/

RAR RUS 191-195 Vasil’ev Gennadiy Gennady.Vasilyev@mail.ioffe.ru Kholupenko Evgeniy eugene@astro.ioffe.ru Yablokov Sergey Yablokov S.N. Bayko Denis baiko@astro.ioffe.ru Ioffe Institute Bykov Andrey byk@astro.ioffe.ru

St. Petersburg, Russian Federation

Krasil’shchikov Alexander kra@astro.ioffe.ru Pavlov Georgiy pavlov@astro.psu.edu The influence of the night-sky background on ground-based observations of gamma-ray bursts in the range between 1 and 10 GeV The influence of night-sky background on detecting cosmic gamma-ray bursts and measurements of their light curves with ground-based Cherenkov telescopes in the range between 1 and 10 GeV is considered. It is shown that the probability of registration of Cherenkov flashes from cosmic gamma-quanta decreases significantly at energies less than 3 GeV under the influence of night sky optical background even if the sensitivity of detecting units is better than that of modern Cherenkov telescopes. 524, 539.1 gamma-rays cherenkov radiation extensive atmospheric showers gamma-ray bursts night-sky background https://physmath.spbstu.ru/article/2012.16.29/

RAR RUS 195-201 Ioffe Institute Bykov Andrey byk@astro.ioffe.ru

St. Petersburg, Russian Federation

Gladilin Petr peter.gladilin@gmail.com Osipov Sergey osm2004@mail.ru Pavlov Georgiy pavlov@astro.psu.edu Role of firehose instability in diffusive shock acceleration Comparison of the contribution of pressure anisotropy to growth rates of instability with the contribution of current anisotropy of  distribution function of  the accelerated particles is carried out in shock prefronts of the supernova remnants. It is shown that the contribution of anisotropy of pressure can be important at disturbance scales close to gyroradii of the fastest accelerated particles. 524,3-6 interstellar medium supernova remnants diffusive shock acceleration (dsa) https://physmath.spbstu.ru/article/2012.16.30/

RAR RUS 201-210 Ioffe Institute Uvarov Yuri uv@astro.ioffe.ru

St. Petersburg, Russian Federation

Ioffe Institute Bykov Andrey byk@astro.ioffe.ru

St. Petersburg, Russian Federation

Pavlov Georgiy pavlov@astro.psu.edu Levenfish Kseniya ksen@astro.ioffe.ru Kropotina Yuliya Kropotina Yu.A. Vela pulsar wind nebula: determination of the anisotropy of accelerated particle distribution function A geometric model of Vela pulsar wind nebula (PWN) is suggested. The method of determination of leptonic distribution function anisotropy is developed based on the comparison of high resolution roentgen Chandra images of Vela PWN with model predicted images. An angular dependence of distribution function in the nebula rest frame is obtained in the ranges ofangle between particle velocity and pulsar wind direction T: 10q < T < 90q and 130q < T < 160q. 524.3-1 7, 524.354 pulsar wind nebula synchrotron radiation diffusive shock acceleration (DSA) https://physmath.spbstu.ru/article/2012.16.31/

CHR RUS 211-214 Kozhevnikov Nikolay M. nkozhevn@mail.ru The anniversary session of the Presidium of the Scientific and Methodological Council on Physics of the Ministry of Education and Science of the Russian Federation The results of the meeting of the Presidium of the Scientific and Methodological Council on Physics dedicated to the 10th anniversary of the Council’s activity in its current make-up are presented. Upon discussing the Council performance report the Presidium passed a number of constructive resolutions. 378.1:53 physics training programmes scientific and methodological council problems of education https://physmath.spbstu.ru/article/2012.16.32/