Bulletin of the Russian Academy of Sciences: Physics
Bulletin of the Russian Academy of Sciences. Physics is a peer-reviewed journal that showcases full-text articles, including regular articles, letters to the editor, and reviews, presenting the latest research findings across a diverse range of fields in physics and astronomy. These fields encompass nuclear physics, cosmic rays, condensed matter physics, plasma physics, optics and photonics, nanotechnologies, solar and astrophysics, as well as physical applications in material sciences, life sciences, and in other fields. Bulletin of the Russian Academy of Sciences. Physics focuses on the most relevant multidisciplinary topics in natural sciences, both fundamental and applied. The journal focuses on the most relevant multidisciplinary topics in natural sciences, encompassing both fundamental and applied research. Accepted articles are usually grouped into thematic issues. The authors featured in the journal comprise esteemed scientific laboratories and institutes from various countries, including large international collaborations. Among the authors are globally recognized researchers, including Nobel laureates, recipients of other prestigious awards, and members of national academies of sciences and international scientific societies. With a commitment to becoming an international publication, the journal actively encourages submissions in English from researchers across the globe, fostering a diverse and inclusive scientific community.
Peer review and editorial policy
The journal follows the Springer Nature Peer Review Policy, Process and Guidance, Springer Nature Journal Editors' Code of Conduct, and COPE's Ethical Guidelines for Peer-reviewers.
The journal's portfolio is formed in the form of thematic issues, compiled in collaboration with invited editors who are experts in one of the thematic areas of the journal. Traditionally, invited editors are members of the program committees of major international scientific conferences and symposiums. Thematic issues are composed of full-text articles prepared based on the best conference presentations and talks recommended by the conference program committees. Individual manuscripts submitted to the editorial office without the involvement of invited editors are considered by the editorial board in coordination with the invited editor. For articles that constitute a separate thematic issue, the decision on the appointment of reviewers is made by the invited editor of the issue. All articles undergo peer review by at least two independent and anonymous reviewers. The first reviewer is usually a member of the conference program committee or a leading thematic section, who provides an in-person assessment of the material and gives an overall evaluation of the article. The first reviewer cannot be the compiler (editor) of the thematic issue. The second reviewer, recommended by the conference program committee, also remains anonymous to the authors and thoroughly and critically examines the manuscript, preparing a review based on which the authors make the necessary revisions. After addressing the comments, manuscripts receiving positive reviews are forwarded to the editorial office. The editorial board may, at its discretion, send individual manuscripts for additional review. For manuscripts submitted to the editorial office independently of the editors of thematic issues, two anonymous reviewers are assigned. Manuscripts that receive at least two positive reviews are considered for publication.
When compiling thematic issues, the invited editor rejects approximately 20 to 40% of the submitted manuscripts that do not comply with the submission guidelines. The journal follows a single-blind reviewing procedure. The time from submission to the first decision is usually no more than 40 days. The approximate rejection rate is at least 15%. The final decision on the acceptance of a manuscript for publication is made by the Editor-in-Chief or one of the Deputy Editors-in-Chief.
If Editors, including the Editor-in-Chief, publish in the journal, they do not participate in the decision-making process for manuscripts where they are listed as co-authors.
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Vol 83, No 12 (2019)
- Year: 2019
- Articles: 29
- URL: https://journals.rcsi.science/1062-8738/issue/view/11749
Article
Formation of Annular Light Bullets in a Femtosecond Vortex Beam
Abstract
The formation of annular light bullets during the filamentation of femtosecond optical vortices in a LiF crystal under conditions of anomalous group velocity dispersion is considered. Features of the spatiotemporal dynamics of pulses are described. Quantitative estimates of the parameters of light bullets are given. The mechanism of the formation of a light bullet in the first nonlinear focus is analyzed. Models of a stationary optical vortex and a slit beam are considered.
1443-1449
1450-1452
Improving the Energy Efficiency of Diffraction Optical Elements for 3D Nanoscopy
Abstract
A way of improving the energy efficiency of diffraction optical elements (DOEs) that form two-lobe light fields whose intensity distribution rotates in propagation is studied. Such DOEs find application in ultrahigh resolution microscopy to modify the spread function of a point light source via phase spatial light beam modulation, allowing all three spatial coordinates of point emitting objects to be reconstructed with nanometric accuracy. Enhancing the energy efficiency of diffraction optical elements is essential for improving the accuracy of point emitter localization in the longitudinal direction (along the Z-axis).
1453-1458
Optimization of Photon Molecules for Quantum Memory
Abstract
A staged procedure is proposed for optimizing multiresonator quantum memory, based on a system of interacting ring resonators connected by a common waveguide. The presented scheme of optimization is an effective and reliable way of obtaining a spectrally improved ultra-broadband quantum memory on a chip.
1459-1461
Critical Parameters of Tapered Fibers for Sensors of Physical Values
Abstract
A study is made of the technological processes involved in manufacturing tapered fibers with consistent replicability of parameters when they are heated with a brief non-adiabatic window of narrowing. The results are presented from experiments on the electric-spark manufacturing of tapered fibers with specified parameters on a setup with specialized capabilities for implementing these processes.
1462-1465
Effect of Local Structure on Rotational Contributions in the Ultrafast Optical Kerr Effect in Pure Liquid Acetonitrile and Dimethyl Sulfoxide
Abstract
The relationship between the structures of liquid acetonitrile (AN) and dimethyl sulfoxide (DMSO) and rotational contributions in the ultrafast optical Kerr effect is considered. It is shown that the structure of associates in the form of chains impedes the emergence of induced orientational anisotropy of molecules in liquid DMSO. In liquid AN, antiparallel dimers are capable of reorientation under the action of a pump laser field; both dimers and monomers contribute to the libration response.
1466-1469
Possibilities of Double-Pulse Femtosecond Polarization Spectroscopy Based on Registration of the Ultrafast Optical Kerr Effect
Abstract
Spectroscopic data are presented for the motion of molecules in a liquid during double-pulse excitation and registration of the ultrafast optical Kerr effect (OKE). It is shown that selective spectroscopy of individual molecular motions can be achieved by choosing certain parameters of the double-pulse sequence.
1470-1472
Features of the Photoinduced Conductivity of Heterostructures Based on Complex Lanthanum Oxide and Strontium Oxide
Abstract
Results from studying the effect of ultrashort laser pulses with a wavelength of 514 nm on the electrical resistance of the LAO/STO heterostructure in the temperature range of 80–290 K are discussed. A reversible increase in sample resistance upon irradiation with light over the range of temperature changes is detected.
1473-1474
New Highly Sensitive Film Sensors Based on Mesogenic Lanthanide(III) Beta-Diketonate Complexes for Reusable Luminescent Thermometers
Abstract
A new approach to the creation of photostable highly sensitive sensor elements for reusable luminescent thermometers based on vitrified films of mesogenic europium(III) and terbium(III) beta-diketonate complexes that are oxygen insensitive, effectively absorbing light in the region of 390–410 nm and reversibly changing the luminescence decay time in the region of 143–348 K, is proposed.
1475-1479
Generation of the Second Harmonic in Metacrylic Polymer Electret Films Doped with Organic Chromophores
Abstract
Using amplified femtosecond pulses at a wavelength of 1028 nm, the second harmonic is generated at a wavelength of 514 nm by composite polymer films containing D-π-A (push–pull) chromophores with quadratic optical nonlinearity. It is shown that these films are photostable with respect to laser pulses having peak intensities of up to 11.6 GW/cm2. The effective generation of the second harmonic is observed in a wide range of pump beam incidence angles (20°–80°) with a maximum in the vicinity of 60°.
1480-1483
Luminescence Characteristics of YVO4:Yb3+/Er3+ Nanoparticles
Abstract
YVO4:Yb,Er luminescent nanoparticles (NPs) with sizes of 10–700 nm are produced. The use of laser excitation wavelengths of 980 and 257 nm results in the emission of Er3+ ions in the spectral region of 527 and 555 nm. No spectral line of Er3+ ions is recorded at 660 nm, which is indirect evidence of the low efficiency of nonradiative multiphonon intra-ion transitions and the insensitivity of NPs to luminescence quenchers in an aqueous solution.
1484-1486
IR Spectroscopic Analysis of the Distribution of Free Volume in Plasticized Polyvinyl Butyral
Abstract
The distribution of the free volume in the polymer matrix of polyvinyl butyral (PVB) plasticized by polyethyleneglycol (PEG400) is studied via FTIR spectroscopy. The effective sizes of mobile elements of the free volume in PVB/PEG400 systems with 80 : 20, 70 : 30, 60 : 40 and 50 : 50 compositions are determined using a set of conformationally-inhomogeneous probes. It is shown that the percentage of PVB/PEG400 systems influences the distribution of free volume.
1487-1489
Complex Diagnostics of Defects in High-Voltage Insulators
Abstract
A complex procedure is developed that allows remote measuring of a set of characteristics of partial discharges and increased gradients of an electric field at the working voltage. Simultaneous use of electromagnetic, acoustic and electro-optical sensors makes it possible to determine the types and locations of defects and their influence on the workability of high-voltage insulators.
1490-1493
Using a Neural Network to Separate Lungs in X-Ray Images
Abstract
An auxiliary neural network is developed to solve the problem of preliminarily processing X-ray images to distinguish areas with lung and spine, and to mask unnecessary areas. Images processed with the neural network are used to study the main neural network for detecting pathology in lungs. A comparative analysis is performed of the quality of studying the main neural network on the basis of preliminarily processed images and initial ones.
1494-1497
X-Ray Characteristics of Materials for Modeling Human Torso Phantoms
Abstract
Materials for human torso phantom are selected for testing software in developing systems of intra-operational navigation based on 3D modeling with the technology of augmented reality. According to the Hounsfield scale, the X-ray density of the selected equivalent tissues lies in the range corresponding to certain groups of biological tissues. The reliability of the investigation is demonstrated by comparing 3D models of a real patient and a phantom made from the given material.
1498-1501
Study of Anti-Stokes Band Displacement in the Spectra of Stimulated Brillouin Scattering: Amplification in Colloid Solutions Containing Pathogenic Organisms and Nanoparticles
Abstract
The possibility is considered of developing a technique of stimulated Brillouin scattering (SBS) to determine the concentrations of nanostructures for which information on the composition is carried by the distribution of the anti-Stokes component of the spectrum. Experimental studies are performed on the dynamics of the suspension spectra of E. coli vaccine strains and the spectra of biological structures. Estimates are made and the intensities of pumping radiation are experimentally selected at which the logarithm of the intensity of the anti-Stokes component is a smoothly growing concentration function up to a concentration of 106 microbial cells mL–1.
1502-1506
Deposition of Metal Nanoclusters from Colloidal Solutions on the Surfaces of Porous Roll Materials by Means of Electrophoresis
Abstract
The technology for producing metallized coatings on superporous carbon fiber materials from colloidal solutions by means of electrophoresis is studied. Technologies and equipment for the deposition of silver nanoparticles and other metal nanoparticles on rolled carbon materials are considered. The carbon materials consist of fibers 6 μm thick and are used as an electrode materials for current sources.
1507-1511
A Highly Conductive Layer at an Interface between Ferroelectric BaSrTiO3 and Ferromagnetic LaMnO3
Abstract
Properties of the Ba0.8Sr0.2TiO3/LaMnO3 heterostructure are investigated for when LaMnO3 and Ba0.8Sr0.2TiO3 are deposited on a surface SrTiO3. No state of high conductivity is observed. The effect a magnetic field has on the temperature behavior of resistivity is determined for samples of the Ba0.8Sr0.2TiO3/LaMnO3 heterostructure in its “normal” architecture when a Ba0.8Sr0.2TiO3 film is deposited on a LaMnO3 single crystal.
1512-1515
Active Nanoobjects, Neutrino, and Higgs Fields in Anisotropic Models of Fractal Cosmology
Abstract
The relationships between the main parameters of active nanoobjects (nanoparticles, atomic defects, and neutrinos), the Higgs boson, and the Higgs field are studied in the context of models of fractal cosmology. The properties of active nanoobjects depend on pressure, the state of the physical vacuum, and cosmological parameters. Estimates are obtained for the rest masses of neutrinos, and for the limit rotational frequency and size of a nanoparticle in a circularly polarized laser field.
1516-1520
Features of the Magnetic Spectra of the Transverse Kerr Effect in Layered Ferromagnetic Samples Au–Co
Abstract
The spectral dependences of the magneto-optical transverse Kerr effect of nanolayer cobalt-gold samples are investigated. Theoretical spectral dependences of the Kerr effect with and without taking into account the size effect are constructed. Theoretical and experimental data are compared. There is a good qualitative and quantitative agreement of experimental and model spectral dependences. Discussed the possibility of using such nano-layered thin films structures.
1521-1523
Nucleation of Magnetic Micro-Inhomogeneities by an Electric Field
Abstract
1524-1525
A Phenomenological Description of the Sequence of Phase Transitions in Intermetallics
Abstract
A phenomenological model of the sequence of phase transitions in RCo2 intermetallics (R = Gd, Tb, Nd, Ho, Er, Sm), constructed by means of catastrophe theory, is proposed. The temperature dependence of an anomalous part of the heat capacity and field dependences of magnetization near the temperature of a phase transition are calculated within the scope of this model. A comparison shows a satisfactory qualitative fit with experimental data.
1526-1528
Magnetodiffusion Effect of the Fe–Sn System in a Magnetic Field at 730°С
Abstract
An experimental study is performed of the effect constant and pulsed magnetic fields have on the coefficient of diffusion for Sn in α-Fe in the 39.8–557.2 kА m−1 range of magnetic field intensities and 1‒21 Hz range of frequencies at 730°С. It is found that the pulsed magnetic fields have a considerable effect on the coefficient of diffusion for Sn in α-Fe. Resonant behavior of the coefficient of bulk diffusion at pulsed magnetic field intensities of more than 238.8 kА m−1 is observed. Possible mechanisms of the observed effect are discussed.
1529-1532
The Research of the Repolarization Process in Solid Solutions (Rb1 – xKx)2ZnCl4 by the Harmonic Analysis Method
Abstract
The reactive component \({{J}_{c}}(t)\) and the active component \({{J}_{g}}(t)\) time dependences by the harmonic analysis method of the current density \({{J}_{x}}(t)\) time dependences arising in the repolarization process in the studied samples in the ferroelectric phase under the action of an electric field \(E(t)\), whose amplitude is higher than the coercive one, are obtained. Obtained dependences analysis showed general regularities in the dynamics of the (Rb1 – xKx)2ZnCl4 crystals domain boundaries. The regularities of the defects influence on the nonlinear physical properties associated with the domain structure dynamics are revealed.
1533-1538
Simulating the Response of a Natural Heterostructure on the Action of a Pulse Magnetic Field
Abstract
The model of the response of the microstructure of modified wood on the action of a pulsed magnetic field is proposed. The experimental dependence of the hardness of modified wood on the time of the exposure underlies the model. The model makes it possible to determine the parameters characterizing the kinetics of the formation of intermolecular chemical bonds from free radicals stimulated by the action of a pulsed magnetic field.
1539-1540
Method of Assessing the Acoustic Relaxation Polymer Spectrum
Abstract
The paper presents an approach to assessing the relaxation spectrum of polymers based on experimental data obtained by ultrasonic spectrometry. The proposed approach is based on the expansion of the experimental frequency window by extrapolating experimental data based on an approximating model, and it is assumed that the structure of the relaxation spectrum function for this type of polymer is known in advance.
1541-1542
About One Approach to Analysis of IR-Spectra of Natural Origin Heterostructures
Abstract
The article presents the results of the analysis of changes in the IR-spectra of wood samples after their moistening. The analysis is carried out by a simulation method based on minimizing the standard deviation of the strip profile using the Gauss function. Using the proposed approach makes it possible to specify the mechanisms of moisture transfer in micro pores of wood.
1543-1544
Structure and Total Strength of the Magnetic Dipole Resonance on Excited States in sd-Shell Nuclei
Abstract
The gamma-decay of resonance-like structures observed in the reaction of the radiative capture of protons by 22Ne, 26Mg, 30Si, 34,36S, and 38Ar nuclei in the 7–12 MeV region of excitation energies is studied. The excitation functions of this reaction are measured. The resonance strengths of states in energy range Ep = 1.0–3.0 MeV of accelerated protons are determined. The discrete distributions of magnetic dipole γ-transitions between the ground and excited states for sd-shell nuclei are of a resonance nature. A magnetic dipole resonance is identified for the ground and excited states in the above nuclei. The position of the magnetic dipole resonance on the excited states coincides with the one predicted by the Brink–Axel hypothesis for nuclei at the beginning of a subshell.
1545-1548
Experimental Studies of the Production of π0-Mesons and η-Mesons in U + U Interactions at an Energy of 192 GeV
Abstract
Studies of collisions between ultrarelativistic heavy nuclei at the Relativistic Heavy Ion Collider (RHIC) led to the discovery of a qualitatively new state of matter (strongly coupled quark–gluon plasma), in which quarks and gluons are not bound inside hadrons, but move freely within the volume of the created medium. The U + U collision system with an energy of 192 GeV at the RHIC is the heaviest system of colliding nuclei used in colliding beam experiments and allows us to obtain the highest energy density among systems of ultrarelativistic colliding nuclei. The results are presented from measuring factors of the nuclear modification of π0- and η-mesons in (U + U) collisions at an energy of 192 GeV.
1549-1552