Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ
“Известия Российской академии наук. Серия физическая” (Izvestiya Rossiiskoi Akademii Nauk. Seriya Fizicheskaya, ISSN 0367-6765; English translation: “Bulletin of the Russian Academy of Sciences: Physics”, ISSN 1062-8738) is a Russian peer-reviewed scientific journal established in 1936 as the Bulletin of the Academy of Sciences of USSR: Physics Series. It presents full-text articles with the most recent results in miscellaneous fields of physics and astronomy: nuclear physics, cosmic rays, condensed matter physics, plasma physics, optics and photonics, nanotechnologies, solar and astrophysics, physical applications in material sciences, life sciences, etc. The journal focuses on the most relevant multidisciplinary topics in natural sciences, both fundamental and applied.
For more than 80 years, the main purpose of the journal is to provide authors with the opportunity to publish and discuss the results of relevant fundamental and applied scientific research, presented at conferences, symposiums and scientific schools, organized by the Russian Academy of Sciences, which are recognized by the world scientific community and interdisciplinary experts. The journal accepts for publishing full-text articles, which are prepared on the base of best talks, recommended by program committees of the scientific events, which are of interest to a wide range of readers. Articles containing new and previously unpublished results are peer-reviewed by at least two independent reviewers and are published in special thematic issues of the journal. The journal is open for publishing of the most authoritative and advanced research results in the field of fundamental and applied physics, obtained in Russia and neighboring countries, as well as from authors from all over the world.
The journal is published by the Russian Academy of Sciences under the conduction of the Physical Sciences Division of RAS. The originator is the Editorial Board of the journal “Bulletin of the Russian Academy of Sciences: Physics”.
Until 2018, the journal was published by “Nauka” Publishing House.
Preparation of the original layout and publication of the journal is currently carried out under the state contract by LLC “Thematic Editorial”.
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The journal is included in the List of journals recognized by the Higher Attestation Commission of the Ministry of Science and Higher Education of the Russian Federation and included into the Russian scientific citation system RSCI. The translated version of the journal – Bulletin of the Russian Academy of Sciences: Physics – is indexed in Scopus and is included in the Russian Science Citation Index database on the Web of Science platform.
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Volume 89, Nº 5 (2025)
- Ano: 2025
- Artigos: 23
- URL: https://jdigitaldiagnostics.com/0367-6765/issue/view/14002
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Physics of Auroral Phenomena
Influence of substorms on the development of magnetic storms in different sectors of MLT
Resumo
The influence of substorms on the development of magnetic storms is investigated using 1 min data from the world network of ground-based magnetometers. A comparative analysis of the dynamics of auroral electrojets, total and partial ring currents—by SuperMAGindices, field-aligned and ionospheric currents—by maps obtained by the original magnetogram inversion technique, as well as geomagnetic pulsations—by observations at the observatories of ISTP SB RAS is carried out.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(5):672-679
672-679
Jumps in the solar wind dynamic pressure and occurrence of intense geomagnetically induced currents
Resumo
The occurrence of geomagnetically induced currents (GIC) in the Northwest part of Russia associated with jumps in the solar wind dynamic pressure is investigated. Based on the data from the IMAGE and SuperMAG magnetometer networks, as well as the OMNI database, a detailed analysis of the complex space weather event of November 3-4, 2021 was carried out: phenomena in the solar wind, geomagnetic activity, which are compared with the occurrence of intense GICs. Direct measurements of the GIC in the neutral line of the transformers located on the Karelian-Kola power transmission line (Vykhodnoy, Louhi, Kondopoga) and on the natural gas pipeline nearM¨аnts¨аl¨а (South of Finland) are used. The complex space weather event was divided into three cases observed in the midnight, morning and daytime sectors. Each case was associated with the jump in the solar wind dynamic pressure (∼ 20-30 nPa). It is shown that in the midnight and morning sectors the cause of the GIC excitation was the intensification and expansion of the substorm westward electrojet; in the daytime and early evening sectors - sharp intensifications of the eastward electrojet, which were associated with the development of supersubstorms and intense substorms on the night side. In the morning and daytimeMLT sectors, during the recovery phase of substorms and after them, Pi3 pulsations were observed, which also caused GIС, but their values did not exceed the threshold values.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(5):680-691
680-691
Ionospheric manifestation of moderate geomagnetic storm on September 12, 2023, based on comprehensive ionospheric radiosonde
Resumo
The results of studies of the ionosphere on September 12, 2023, by a system of mid-latitude synchronously operating oblique and vertical sounding ionosonde stations are presented, when during the main phase of the development of a class G1 geomagnetic storm, against the background of regular reflections from the F-layer of the ionosphere, strong diffuse reflections from the dynamic structures of the auroral ionosphere were detected.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(5):692-699
692-699
Occurrence of the polar tongue of ionization and ionospheric irregularities in the total electron content measurements during 7 November 2022 magnetic storm
Resumo
The evolution of polar tongue of ionization (TOI) in electron content measurements during 7 November 2022 geomagnetic storm was analyzed. The tongue was formed during the daytime over Canada and then occurred in the nighttime ionosphere on the European region. The increase of ionospheric irregularities intensity in the polar region was revealed and their connection with TOI was shown.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(5):700-707
700-707
Growth of relativistic electron fluxes in the outer radiation belt according to data of the Arktika-M satellite (No. 1) during magnetic storms in October-November 2021
Resumo
The paper analyzes variations in electron fluxes of various energies from 0.1 MeV to 2 MeV for CIR and CME magnetic storms in October-November 2021 according to data from the Russian satellites “Arktika-M” (No. 1) and “Elektro-L” (No. 2), as well as the satellite GOES-17. The analysis shows that during the stronger CME storm the level of relativistic electron fluxes was noticeably higher than during the weaker CIR storm both in geostationary orbit and in lower L-shells.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(5):708-717
708-717
Status of the PAIPS project and selected results
Resumo
The PAIPS experiment was created for studying UV luminescence in the auroral region. This experiment represents a system of two imaging photometers with high temporal resolution, located 153 km apart in space and directed into the same region of the atmosphere. This experiment configuration allows stereometric spatial and temporal structure measurements of luminosity. We presented some results from the pulsating auroras (PA) and UV microbursts analysis, as well as examples of the track event reconstruction using probabilistic models based on Bayesian inference. Operation of luminescence altitude calculation algorithm is shown using a single PA event. A database of UV microbursts (series of short UV flashes) for two seasons of the experiment (2021/2022 and 2022/2023) was obtained and analysed.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(5):718-726
718-726
Spatial structure of UV-microbursts in the auroral zone
Resumo
Based on the results of the imaging photometer at the Verkhnetulomsky observatory measurements, 61 series of UV-microbursts were recorded over two seasons — non-periodic successive short UV-emission pulses (less than 500 ms each), lasting from tens of seconds to hours. A study of the spatial structure of UV-microbursts was carried out using the example of the event of November 21, 2021. It is shown that one series can represent an alternation of spots, arcs and diffuse glow outside the field of view. The characteristic sizes of the glow areas are determined.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(5):727-732
727-732
Study of time parameters of interplanetary disturbances with magnetic clouds
Resumo
The registration times of extreme values of the main parameters of the interplanetary medium, cosmic ray variations and geomagnetic activity during the passage of coronal mass ejections with a magnetic cloud past the Earth have been studied. The following parts of interplanetary disturbances were considered: (I) from the interplanetary disturbance onset to the magnetic cloud onset, (II) inside the magnetic cloud, (III) from the magnetic cloud end to the interplanetary disturbance end, which was often the onset of the next interplanetary disturbance. It is shown in which part of the interplanetary disturbances the extremes of solar wind speed, interplanetary magnetic field, density and anisotropy of cosmic rays, as well as geomagnetic activity indices are most often recorded.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(5):733-737
733-737
Electromagnetic emissions by ZEVS transmitter and the “Northern transit” power transmission line registered on CSES satellite
Resumo
82 Hz radiation from ZEVS transmitter and 50 Hz emission from the “Northern transit” power transmission line was registered by the low-orbit satellite CSES (altitude ~500 km) while flying over the Kola Peninsula. ZEVS signal was detected at distances from 300 to 2300 km, as measured between the subsatellite point and the transmitter. Amplitude of electric component |E| at frequency of 82 Hz was found to be about 2.5 μV/m at 800 km from the transmitter. The corresponding amplitude of magnetic component |B| was found to be about 1.3 pT. The spatial structure of amplitudes of 50 Hz radiation dramatically rearranged during the satellite’s transition from one power line to another. Amplitude of electric and magnetic component of 50 Hz radiation registered above the Northern Transit power line, was estimated as follows: |E| ≈ 0.5–2.0 μV/m and |B| ≈ 0.5–1.5 pT. Measurements at small distances from the source (several hundred km) qualitatively agree with the results of the simulated spatial structure of wave field in the upper ionosphere, excited by a horizontal current of a finite length. However, at large distances, the amplitude of the 82 Hz radiation decreased more slowly with distance from the ZEVS transmitter compared to model calculations, based on assumption of vertical geomagnetic field.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(5):738-744
738-744
Analysis of the spatial dynamics of the auroral hiss and longitudinal currents based on observations at the Barentsburg Observatory and the AMPERE project
Resumo
We presented the results of the auroral hiss illuminated region location based on measurements of the magnetic field polarization and azimuthal angles of arrival of these emissions according to observations at the Barentsburg Observatory (BAB). The results obtained are compared with the position of the longitudinal current amplification region supplied by the AMPERE project. An event is identified where two separate regions of field-aligned current amplification exist simultaneously. The arrival angles histograms at BAB have two maxima, indicating waves arriving from two distinct directions. We also discussed the event of moving the hiss illumination region along the longitude from east to west, simultaneously with the movement of the aurora and the region of field-aligned currents in the same direction, as well as the simultaneous displacement of the illumination region and the area of amplification of the resulting longitudinal currents towards the auroral latitudes. Based on the findings of our analysis, we have proposed a possible connection between the occurrence of hiss on the ground-based level and the activity of longitudinal currents in the ionosphere.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(5):745-752
745-752
The relationship between VLF transmitter signal amplitudes and high-energy electron precipitation during geomagnetic disturbances
Resumo
We considered the issue of an anomalous decrease in the amplitude of the magnetic field components of the VLF transmitter signals at the Lovozero station (LOZ) during geomagnetic disturbances at night to daytime values. During this period, auroral precipitation was observed at LOZ, and riometer absorption was recorded at Sodankyla and Ivalo. According to POES satellite data, electron precipitation with particles energies >612 keV was observed in the region of the Lovozero station. The scale of the projection of the precipitation area for particles with energies >287 keV averaged about 200 km. Using numerical modeling, shown that the experimentally observed effect of the nighttime decrease in the amplitudes of the VLF transmitter signal can be explained by the existence of an inhomogeneity in the ionosphere caused by a flux of electrons with energies >200 keV and scales of inhomogeneity about 200 km.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(5):753-759
753-759
Observation and generation of two-band noise emissions above and below half the gyrofrequency of electrons near the geomagnetic equator
Resumo
We studied spectral characteristics of VLF waves observed onboard the Van Allen Probe B satellite on November 30, 2015. The peculiarity of the observed spectrum is the presence of two spectral maxima below and above half the electron gyrofrequency. Such a feature, typical of the spectra of chorus emissions, was observed for noise-like emissions in the case under discussion. Simultaneously with the observation of VLF emissions, the satellite also measured differential fluxes of energetic electrons, the magnitude of the ambient magnetic field, and cold plasma concentration. Based on these data, the growth rates of waves in the whistler band were calculated. The calculations were performed in two different ways, which yielded similar results. Comparison of the observed spectra of noise emissions and the calculated wave growth rates shows their good agreement.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(5):760-768
760-768
The influence of electron precipitation on the outer electron radiation belt position
Resumo
Variations of the trapped and precipitating electron fluxes of the Earth's outer radiation belt during November 6–13, 2015, were considered. Numerous substorms during the main phase and during the prolonged recovery phase of the moderate magnetic storm on November 6, 2015, led to multiple particle injections into the inner magnetosphere. The profiles of the outer radiation belt for energetic electrons (with energies above 0.1, 0.3 and 2 MeV) were reconstructed from the Van Allen Probes-A measurements in the pre–noon and in the evening MLT sectors. The use of data of electron fluxes in the orbits of the polar satellites Meteor-M2, POES18 and POES19 allowed us to determine the areas of precipitation in all MLT sectors. It is shown that electron precipitation events are not local process. During the main phase of the storm and during the periods of substorm activations, energetic electron precipitation events with energy above 0.1 MeV occur in all local times and at distances from L ~ 3.5 to L ~ 8. In the pre–noon sector, precipitation events are observed at more distant L-shells than in the evening sector, this fact indicates different types of wave activity, which lead to the scattering of particles in these areas. Energetic electron precipitation in both the pre–noon and evening sectors causes electron losses mainly in the outer areas of the belt, it leads to a shift of the belt maximum inward.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(5):769-776
769-776
Fractal characteristics of the auroral oval structure based on experimental data
Resumo
We provided a description of the structures of aurora by fractal dimension and its anisotropy. The variability of structures is characterized by the slope of the spectrum of anisotropy variation over time. Statistics of these characteristics are presented based on data from the ground camera of the Polar Geophysical Institute in Apatity for 2013-2015 and referenced by position inside the auroral oval and geomagnetic field values in the Lovozero observatory.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(5):777-781
777-781
Geomagnetic and ionospheric effects of a meteor explosion over the Verkhnetulomsky reservoir on December 19, 2014
Resumo
The geomagnetic and ionospheric effects of a meteor explosion on December 19, 2014, at high latitudes over the Kola Peninsula, Russia are considered. It was shown that the explosion was accompanied by sharp changes of environmental parameters. For the first time, it was suggested that sudden changes in the geomagnetic field are caused by the impact of the shock wave from the meteor explosion on auroral electrojets.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(5):782-788
782-788
Estimation of the average energy of auroral electrons using an intensity ratio of 630.0 and 427.8 nm emissions
Resumo
The effect of three factors on the dependence of the average energy of the auroral electron flux on the ratio of the intensities of the 630.0 and 427.8 nm emissions, namely: the shape of the energy spectrum of the auroral electron flux, the concentration of atomic oxygen in the neutral atmosphere and the concentration of nitrogen oxide, was studied using numerical modeling. It is shown that the influence of the considered factors on the average dependence does not exceed 20% for the ratios of emission intensities of 630.0 and 427.8 nm, which lie in the range from 0.1 to 10. An analytical approximation of the calculated dependence is presented.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(5):789-795
789-795
Seasonal and diurnal variations in the ionic content of the Earth’s average atmosphere and ionosphere
Resumo
The high-latitude atmosphere is ionized by direct solar radiation. This leads to the formation of positively charged ions through, for example, photo-adhesion and ionization of NO. In this work, using a one-dimensional chemical and climatic model with interactive neutral and ionic chemistry, we tracked the ionic compositions of the D region of the ionosphere on daily and seasonal scales.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(5):796-801
796-801
Spatial features of the ionospheric disturbance caused by a meteorological squall
Resumo
Numerical experiments were carried out aimed at investigating the changes in atmospheric and ionospheric parameters caused by the propagation of atmospheric waves from the troposphere from a meteorological source. Numerical simulations were carried out using the high-resolution numerical model AtmoSym and the Global Self-Consistent Model of the Thermosphere, Ionosphere and Protonosphere (GSM TIP). Acoustic and internal gravity waves are included in the large-scale model without parameterization.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(5):802-806
802-806
Influence of parameters of crossbars with STT-MRAM on the accuracy of analog neural networks
Resumo
Matrices of STT-MRAM cells assembled into a 3×3 crossbar architecture were studied. We experimentally found how the interconnect resistance affects the fidelity of the combined multiply-accumulate operations. The obtained results were compared with the simulation results in the CAD Cadence. The results of the work allow us to evaluate the contribution of the fidelity of performing combined multiply-accumulate operations, which must be considered when training analog neural networks.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(5):807-813
807-813
Study of the features of spin-injection generation of THz radiation in arrays of magnetic nanowires
Resumo
The operation of a spin-injection THz emitter based on an array of two-layer FeCo/FeNi nanowires grown in a track membrane is investigated. The general operating principle of a spin-injection emitter is presented. The non-thermal nature of spin-injection radiation in the frequency range of 15–20 THz was experimentally demonstrated. When the voltage reached 3 V, the effect of an abrupt increase in the resistance of the emitter, a decrease in its current, and at the same time an increase in the emitted power was observed. The effect of power increase with decreasing current is presumably associated with the presence of spin impedance in the magnetic transitions of nanowires.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(5):814-819
814-819
Thermally stimulated luminescence of colloidal InP/ZnS quantum dots
Resumo
For the first time, spectrally resolved thermally stimulated luminescence in core/shell colloidal InP/ZnS quantum dots after exposure to UV radiation at 7 K is studied. Analysis of the measured luminescence spectra shows that the recombination of charge carriers localized under irradiation and released upon further stimulation occurs with the participation of defect centers based on dangling indium and phosphorus bonds. Using the initial growth method and the formalism of general-order kinetics, the kinetic features of possible thermally stimulated mechanisms are analyzed, and the energy characteristics of the corresponding capture centers are estimated. Active traps in the studied nanocrystals are found to be characterized by close activation energy values in the range of 25–29 meV.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(5):820-825
820-825
On features of hyperonic interactions in neutron stars
Resumo
Interplay between properties of hyperonic interactions and neutron star observables is studied with Skyrme NN, ΛN, and ΛΛ potentials. It is shown that the ΛN potentials with different density dependencies, which describe Λ hypernuclear spectra equally well, lead to substantially different dependence of neutron star mass on its radius. The role of the nucleon density dependence of ΛΛ potential is considered within the Skyrme formalism at the first time. It is shown that this dependence influences the calculated masses and radii weaker.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(5):826-831
826-831
Optimization of the quantitative composition of scintillation additives for a tellurium-loaded plastic scintillator
Resumo
We described the optimization of the composition of a tellurium-loaded plastic scintillator (TePS) for experiments on the search for neutrinoless double beta decay. Polystyrene was used as a scintillation base for Te-PS and 2,5-diphenyloxazole (PPO) and 1,4-bis(5-phenyloxazol-2-yl)benzene (POPOP) were used as scintillation additives. Complex compound of diphenyltellurium oxide and di-(2-ethylhexyl)phosphoric acid in a concentration corresponding to 1% tellurium content was used as tellurium-containing additive. The light yield and transparency of the scintillators were measured.
Izvestiâ Akademii nauk SSSR. Seriâ fizičeskaâ. 2025;89(5):832-836
832-836