Abstract An analysis is performed of the effect a magnetic field has on the propagation of electromagnetic waves under the conditions of pumping and nonlinear absorption introduced phenomenologically in a medium with zigzag carbon nanotubes. The dependence of the pulse waveform on the magnetic field and coefficients of nonlinear absorption is analyzed.

Abstract For a planar structure of dielectric and conducting layers, which allows independent propagation of waves of TE- and TM- types, it is shown that for a plane volume wave of the transverse magnetic type incident from the outside, the result of the interaction of partial evanescent waves in each of the layers of the hybrid structure may not be only a sharp increase in the amplitude of the excited

Abstract Conformational dynamics in polyvinylidene fluoride is studied via IR spectroscopy of conformational probes. The nature of relaxation transitions that occur at temperatures of 180 and 230 K is explained. The possibility of detecting crankshaft-type local molecular motion is demonstrated. The temperatures of transitions, obtained using conformational probes, are compared to those of relaxation

Abstract The propagation of an extremely short three-dimensional optical pulse in a medium of semiconductor carbon nanotubes under the conditions of a cylindrical optical resonator is studied theoretically. The pulse’s cross section is described by Mathieu functions. Numerical modeling is used to show that such pulses propagate steadily, retaining their energy in a limited spatial region. The pulse

Abstract Invariant transverse momentum spectra and nuclear modification factors of K*(892) mesons are measured in Cu + Au collisions at the energy of 200 GeV. The measurements are performed in five centrality bins in the transverse momentum range of 2.0 to 5.75 GeV c–1 in the PHENIX experiment at RHIC. The nuclear modification factors are compared to the earlier PHENIX data obtained for symmetric Cu

Abstract A study is performed of the technological processes for manufacturing fibers with short tapered regions for the new generation of optical microphones using the electrical discharge technique. The experimental use of a technique for manufacturing nanofibers with given parameters on a facility with specialized capabilities is described. Aspects of the transmission of radiation through such tapered

Abstract Based on the luminescence spectroscopy data, it was shown that the method of fixing (between two plates of quartz, quartz and brass, quartz and silicon) a vitrified film prepared from a powder of an anisometric europium(III) β-diketonate complex does not affect the photophysical properties of the film in the temperature range of 270–370 K and, accordingly, does not affect the operational characteristics

Abstract Results are presented from experimental studies of the СО2 molecules sorption by birch wood exposed to a weak pulsed magnetic field (PMF). Тhe PMF effect is shown to alter the supramolecular structure of СО2 molecules in wood. An analytical relationship is found for the temporal change in the characteristic intensity of the absorption bands of molecules.

Abstract Measurements of φ-mesons in such small colliding systems as p + Au and He + Au are used to study the effects of cold nuclear matter, in order to separate ones caused by the formation of quark–gluon plasma from those produced by cold nuclear matter in collisions between heavy ions. The effects of cold nuclear matter are multiple parton scattering, loss of the energy of partons in the initial

Abstract A study is performed of the effect irradiation with a series of ultrafast laser pulses at wavelengths of 514 and 257 nm has on the electrical resistivity of Ba0.8Sr0.2TiO3/LaMnO3 heterostructures. In the range of temperatures between 80 and 200 K, irradiation results in a reversible increase in the resistivity of the structure. The characteristic time of resistivity variation is about 10 s

Abstract— A procedure is proposed for template-assisted synthesis on track membranes using iodide electrolyte to produce substrates with dendritic nanostructures formed on the tips of silver nanowires. The distribution of the electromagnetic field near a silver nanorhombus irradiated with visible laser radiation is modeled because the dendrite branches are rhombus-shaped nanoparticles. Calculations

Abstract A theoretical investigation is performed for the possibility and conditions of the stimulated induction of excitons in a thin layer of semiconductor quantum dots upon excitation by continuous-wave laser radiation.

Abstract In this paper we give formulae for three-particle corrections to the matter density of spherical fermionic quantum systems with an odd number of particles in their ground and excited states. The corrections add to the spherical shape due to pairing vibrations and also infer deformation. In order to achieve trackable results we performed a series of approximations which do not allow for considering

Abstract An investigation is performed of the mechanism behind the peeling of an adsorbed flexible macromolecule from a surface under the action of a strong mean field formed by intermolecular interactions with other chains. The kinetic equation for the order parameter and its solution are obtained. The effect of a critical slowdown (in a sharp increase in periods of relaxation time at the critical

Abstract High frequency ultrasonic waves in the 200–300 MHz range are used to study features of charged complexes organized by O2– ions around Jahn–Teller ions Nb5+ and Fe2+ in congruent crystals of LiNbO3 doped with Fe2+. Parameters of the distortion of NbO6 and FeO6 octahedra that results from the interaction between Jahn–Teller ions and the host crystal lattice are determined from the temperature

Abstract Nanoparticles of YVO4 doped with Yb3+ and Er3+ ions, which exhibit upconversion luminescence upon cw laser excitation at 980 nm, are synthesized according to the familiar hydrothermal procedure. Physical and structural features of intermediate products obtained at different technological stages of creating upconversion nanoparticles are established via electron microscopy, Raman spectroscopy

Abstract Results are presented from a thermal activation analysis of the plastic deformation of single crystals of Ni3Ge intermetallic compound. Values of the effective energy of activation of plastic deformation are determined for different test temperatures. The effect the orientation of a single crystal has on the effective energy of activation is considered. Crystals deformed along the axes [100]

Abstract Results are presented from an experimental study of the processes of thermal relaxation in viscoelastic media under the action of ultrasonic waves. Silagerm 5020 1/3 polyurethane is selected as a model sample of a viscoelastic medium. A plane ultrasonic transducer with a cooled surface is used to heat the samples. Temporal dependences of the temperature distribution at different depths of

Abstract Bismuth targets were irradiated by 660 MeV proton beam on the Phasotron accelerator in the Joint Institute for Nuclear Research (JINR) in Dubna, Russia. Cross sections of the formation of about 70 residual nuclei are determined by the method of induced activity [1]. The experimental cross sections of residual nuclei are compared with the data obtained by Yu.E. Titarenko et al. [2] as well

Abstract Features of the remote contactless monitoring of the current operating state of high-voltage insulators are considered. The residual life of the insulators is estimated using a set of the diagnostic parameters of most dangerous defects. Particular attention is given to the problem of ultra-high partial discharges caused by the accumulation of charge on the dielectric surfaces of defects from

Abstract The effect physical factors associated with the high-current electric explosion of conductors in a vacuum (pulsed magnetic field, light exposure, radiation leaving specific tracks on nuclear emulsions and other materials) have on biological systems is studied. The effect is assessed from the level of nuclear DNA damage in human peripheral blood leukocytes, the frequency of chromosomal aberrations

Abstract The possibility is considered of using compact linear electron accelerators for the production of medical radioisotopes and neutron therapy. An analysis of calculated data on the flux densities of neutrons and gamma rays shows that photoneutrons and radioisotopes can be effectively produced by using the bremsstrahlung effect generated by a heavy metal target upon its excitation in a range

Abstract Hydrophobic derivatives of the antibacterial drug ciprofloxacin are synthesized and used as photoinitiators of two-photon polymerization. A way of selecting 3D printing parameters and the effect they have on scaffold topography are described for photosensitive compositions based on tetrafunctional poly(D,L-lactide) and ciprofloxacin derivatives.

Abstract A technique for extracting DNA from blood cells using magnetic particles offers the advantage of saving time and prospects of automating the extraction process. A way of obtaining magnetic iron nanoparticles for extracting DNA from blood cells is developed. Magnetic nanoparticles with characteristics suitable for extracting genomic DNA from leukocytes are obtained and investigated.

Abstract Structural data are presented along with the results from an impedance spectroscopy study of relaxation at temperatures above and below that of the ferroelectric phase transition of polycrystalline barium–strontium titanate doped with cerium and lanthanum in weak electric fields. The results are interpreted and the electrophysical parameters of grain boundaries are determined using the Heywang

Abstract Ways are considered for the indirect ultrasonic measuring of elastomer figures of merit (fracture strength and Mooney viscosity), using a procedure developed for minimizing the measuring error. An ultrasonic technique is used to study SKS-30 rubber samples. The optimum temperature and frequency conditions for measuring indicators are determined.

Abstract Samples of ceramics based on barium ferrite (FB) and sodium potassium niobate (KNN) are obtained and studied. The elemental composition of the obtained composite is analyzed. A study of pyroelectric properties and magnetic hysteresis loops showed that the composite based on barium ferrite and sodium potassium niobate ceramics obtained in this work had magnetic and ferroelectric properties

Abstract Magnetic responses of the brain to rhythmic visual stimulation are measured at frequencies of ~10 Hz using a 7-channel SQUID magnetoencephalograph. Despite the stationarity of the stimulation, the responses of the brain demonstrate the constant instability of the amplitude and spatial distribution of the magnetic field. The signal from the eyes is periodically redirected to different parts

Abstract— A new way of producing custom blocks for external electron beam therapy is described. The blocks are made of steel or lead grit uniformly distributed in epoxy resin. The proposed technique is user-friendly, inexpensive, and based on non-toxic materials.

Abstract A sol containing biogenic ferrihydrite nanoparticles is obtained by cultivating Klebsiella oxytoca microorganisms. Data on the physical properties of the biogenic ferrihydrite and its effect on the organism of laboratory animals are obtained using a model of experimental hemolytic anemia, according to indicators of the functional activity of erythrocytes and morphological descriptions of organs

Abstract Modern means of radiation therapy are limited by the toxicity and healthy tissues overexposure . FLASH proton therapy is an innovative technique designed to minimize these limitations at ultrahigh dose rate. The first results of tumors and normal human cells irradiated at the dose rates corresponding to the FLASH and conventional mode are presented.

Abstract An experimental study is performed of the sintering technology effect of hard piezoceramic material PCR-8 has on its dielectric hysteresis. It is established that hot pressing and modifications of it allow the ferroelectric hardness of a piezoceramic material with a fixed composition to be varied, and the cost of the resulting piezoceramic products to be lowered by reducing energy expenses

Abstract A mean of spin-exchange optical pumping is considered for the polarization of noble gases using a tunable laser. The possibility is considered of creating a solid-state source of laser radiation with dispersive elements in its cavity in order to achieve spin-exchange optical pumping.

Abstract Active and passive hybrid ways are described for controlling biofilms and the planktonic form of pathogenic microorganisms based on different bactericidal nanomaterials obtained with modern laser technologies. An innovative mobile laser application of the complete suppression of biofilms in situ is described.

Abstract Ways are discussed of describing dielectric spectra using the Cole–Cole distribution, constant phase element, and lognormal distribution. The central parts of the frequency dependences of the real components of the complex dielectric permittivity describe an experiment well in all cases. When using the Cole–Cole distribution, the high-frequency parts of the frequency dependences of the real

Abstract Ways of making precise magnetic measurements and the corresponding magnetometric equipment are promising for practical use in studying electromagnetic processes that occur in biological objects. Analysis of the magnetic component of the electromagnetic activity of different human organs using superconducting quantum magnetometers can be used to develop new medical technologies for the early

Abstract Multidimensional NMR experiments applied in e.g. protein NMR may take days or even weeks of expensive experimental time. Compressed sensing (CS) is a method to save this time: some measurements are skipped and then reconstructed with the help of special algorithms. The orthogonal matching pursuit (OMP) is one of the effective tools of compressed sensing field. In this paper we introduce a

Abstract The Bonner sphere technique with activation foil made of natural tantalum is used to estimate doses during secondary particle irradiation. The neutron spectrum in the isocenter of a Varian Trilogy medical linear accelerator (linac) is calculated. The average neutron energy and the effective neutron cross section are determined. The flux of the (γ, n) reaction is calculated using a measured

Abstract Two noncontact techniques based on the use of ultrashort laser pulses are presented for assisted reproductive technologies. The first creates a unique alphanumeric code on an embryo’s envelope to simplify its identification during the period of preimplantation development. The second ensures the embryo will start to hatch at a prescribed site via laser-assisted drilling of its shell at the

Abstract A series of comprehensive studies is performed to optimize the use of radiation technologies in the sterilization and processing of biological objects. Experimental study reveals the nonlinear dependence of the effectiveness of suppressing pathogenic microorganisms on samples of chilled turkey meat on the dose rate with the doses ranging from 0.25 to 6 kGy. Fluorescence fingerprinting reveals

Abstract The proton accelerator at the Russian Academy of Sciences’ Institute for Nuclear Research provides a mode of irradiation of biological samples with a single pulse when the average dose rate coincides with the pulse dose rate and approaches 1 · MGy s−1. The proton beam facility is described, along with the technique of local film dosimetry used for irradiating cell cultures in laboratory plates

Abstract A way of exciting nuclei using reverse conversion is studied. Nuclear excitation occurs due to resonance absorption of the kinetic energy of the recombining electron and its binding energy in the final state. Calculations of triggering cross sections are made using reverse conversion of the energy of ions of isomeric nucleus 129mSb on a bare nucleus and lithium-like ions. Experiments to study

Abstract The properties of the ground state of even–even nuclei in a wide range of mass numbers are studied in an approximation of a self-consistent relativistic and nonrelativistic mean field of nuclei. Special attention is given to nuclei beyond the theoretically known neutron drip line, which form a peninsula of nuclei stable with respect to the emission of one or two neutrons in (N, Z) space at

Abstract Current experimental and computational studies of the Yalina subcritical setup are reviewed. The main characteristics of the Yalina Thermal facility and its neutron physics parameters are given. Computer modeling of the experimental setup is done using the Monte Carlo MCU-PD and MCNP codes for neutron physics and the updated ENDF/b-VIII, JENDL 4.0, and JEFF 3.3 nuclear data libraries. Rates

Abstract A way of obtaining physical numerical values in tabular mode from raster images of curves is described. The software module for graphic data digitizing is included in the EXFOR-Editor software package developed at the Center of Nuclear Physics Data, All-Russian Research Institute of Experimental Physics. The capabilities of the EXFOR-Editor software for processing numerical tabular data and

Abstract Results are presented from calculating the activities of fission products and actinides for the mean fuel burnup of the Belarusian Nuclear Power Plant (Belarusian NPP) (55.6 MW d t–1 U). Rates of the loss of total activity are obtained for the spent nuclear fuel (referred to below as SNF) depending on the period of storage. Calculation studies of the radiotoxicity characteristics of spent

Abstract Multineutron coupled systems (quasi-nuclei) have yet to be found, despite numerous targeted searches. However, a number of theoretical studies show that the existence of multineutron systems is possible. A new direct approach to detecting multineutron systems is proposed using kinematic features of elastic scattering. The critical angles of multineutrons with respect to the closest lightest

Abstract Nuclear modification factor RAA of π0 mesons produced in 3HeAu collisions at a cms energy of \(\sqrt {{{s}_{{NN}}}} \) = 200 GeV is extracted from data of the PHENIX experiment at the RHIC. The mean RAA value for π0 mesons with pT > 8 GeV/c is found to be close to 0.8 for central 3He + Au collisions.

Abstract Results are presented from an experiment on the inelastic scattering of 11Li with an energy of 66 MeV off protons using the coupled-channel approach with a three-particle model of cluster excitation and the FRESCO code. The model of dipole excitation describes the experiment well. The proposed approach allows determination of the isotope’s excited level, the size of its dineutron periphery

Abstract The excitation spectra of the 10В nucleus in the lithium reactions of triton and α-particle cluster transfer were calculated via summation of the corresponding spectroscopic S-factors within the multiparticle shell model. It is shown that the difference between the excitation spectra of the 10В nucleus in the lithium reactions of α-cluster transfer on 6Li nucleus and in the reaction of 6Li(α

Abstract Strongly intensive quantities for multiplicity and total transverse momentum are calculated using the multipomeron exchange approach for pp collisions in the range of SPS to LHC energies. The model allows for the interaction between quark–gluon strings, the role of which grows along with the energy of collisions. This approach is generalized to the case of pPb collisions.

Abstract Excitation spectra of the 11В nucleus in the lithium reaction of deuteron and α-particle cluster transfer are calculated by summing corresponding spectroscopic S-factors in the multiparticle shell model. It is shown that the difference between the excitation spectra of the 11В nucleus in lithium reactions of α-cluster transfer on the 7Li nucleus and the reaction of 7Li(α, γ)11B radiative capture

Abstract The operating principle of two automated systems for real-time registration of the fluence of neutrons with energies higher than 0.1 MeV is considered. The first system is based on recording the neutron flux density using fission chambers with threshold radiators. The second is based on using silicon transistors as detectors and allowing for the dependence of their current amplification factor

Abstract Nuclear modification factors of φ mesons produced in Cu + Au and U + U collisions at cms energies of \(\sqrt {{{s}_{{NN}}}} \) = 200 and 192 GeV, respectively, are studied using data from the PHENIX experiment. The nuclear modification factors of φ mesons produced in U + U and Cu + Au collisions are compared to results obtained in Au + Au and Cu + Cu systems, and to those of the π0, η, KS

Abstract Analogs of Dirac matrices are constructed from the creation and annihilation operators of spinors. They generate a chiral-symmetric version of electroweak fields and other fields. It is shown that the operator considered in the theory of second quantization to be the one of electric charge is a part of the hypercharge operator of the Pati–Salam theory.

Abstract Results are presented from measuring nuclear modification factors RAA of the π0, η, KS, and ω mesons produced in systems of Cu + Au and U + U collisions at cms energies of \(\sqrt {{{s}_{{NN}}}} \) = 200 and 192 GeV, respectively, in the PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC). The RAA values are found not to depend on the type of neutral meson and to vary in the ~0

Abstract The history and current status of investigations of the unique two-step (n, γf) reaction observed in heavy nuclei under the influence of neutrons are discussed using the example of measurements made on the neutron time-of-flight spectrometer GNEIS in Gatchina. It is shown what is already known and what kind of information can be derived from experiments to study the (n, γf) reaction on resonance

Abstract Results are presented from calculating the neutron radiation of spent nuclear fuel (SNF) from stationary campaigns of VVER-1000 and VVER-1200 reactors due to spontaneous fission and (α, n) reactions. An analytical dependence is obtained for the average number of neutrons produced in spent nuclear fuel per α-particle on the particle’s energy. The neutron radiation of VVER-1200 spent nuclear

Abstract Results are presented from an analysis of experimental data on the 3He(3He,2p)4He reaction, obtained with regard to electron screening. Data on the reaction proceeding in the gas environment are analyzed. The algorithm describing the experimental data in the low energy range presented earlier by the authors has been improved. The electron screening potential of 356 eV is obtained. Using the

Abstract A description is considered of the masses of odd deformed atomic nuclei using fourth order polynomials for an odd nucleus’s deviations of N and Z. It is shown that moving from the second to the fourth order does not bring the parameters obtained for different groups of even–even nuclei closer to one another, and the higher order parameters calculated in this manner do not match satisfactorily