SovietRxiv · Open Access in English
Rediscovering the Soviet scientific archive, in English
25357 full-text translations 14926 English PDFs 22539 abstracts
Showing 50 of 2226 papers in Physics
This paper reports a mass-spectrometric study of ions sampled from the positive column of a hydrogen glow discharge at elevated pressures. Using an anode sampling aperture and carefully cleaned apparatus, the authors detected the usual hydrogen ions together with a mass 5 ion assigned to the molecul…
The study investigates the melting curve of high-purity selenium at pressures from 13,500 to 45,500 kg/cm², extending earlier measurements to determine whether behavior analogous to tellurium appears at higher pressure. Experiments were conducted using a six-punch high-pressure apparatus calibrated …
The paper examines how the optical anisotropy of semirigid chain molecules depends on chain flexibility and molecular weight, with implications for interpreting flow birefringence in polymer solutions. Using Langevin chain statistics together with Porod’s expression for the end-to-end distance of a …
This paper examines an extension of the Poincare group based on the nonuniform group P(SU6), proposed as a framework in which space-time and internal symmetry variables are treated jointly rather than as a direct product. The authors derive the commutation structure, construct the determinant invari…
This paper examines how Coulomb interactions affect the spectrum of free charge carriers in an idealized thin semiconductor film. The film is modeled as a plane dielectric layer with an electron gas confined by an infinite one-dimensional potential well, and the limiting case of a very thin, degener…
This paper examines how spatially nonuniform plasma flow affects instabilities at plasma boundaries and in current-carrying jets moving across magnetic fields. Using linear perturbation analysis, it derives dispersion relations for fluting instability at a plane plasma boundary with a velocity gradi…
This paper reports an X-ray study of the compressibility of hexagonal selenium under hydrostatic pressure up to 15 kbar, motivated by the structural similarity between selenium and tellurium. Hexagonal selenium was prepared from amorphous selenium at high pressure and temperature, examined in a bery…
Negative magnetoresistance was measured in phosphorus-doped n-type silicon in the low-temperature metallic impurity conduction region, for carrier concentrations from 5 x 10^18 to 3 x 10^19 cm^-3. Using a standard potentiometric direct-current method on double-cross samples in magnetic fields up to …
This paper reports preliminary measurements of solar plasma flows made by charged particle traps aboard the Zond-2 interplanetary station during early December 1964. The authors describe the integral and modulation trap instruments, their energy ranges, and the method used to estimate proton fluxes …
This paper analyzes the radiation of an initially excited two-level molecule embedded in a dilute ensemble of identical resonant unexcited molecules, where repeated absorption and emission can alter photon propagation and quench radiation. Using the Hamiltonian for the coupled molecule-field system,…
This paper examines diffraction synchronization in optical quantum generators, motivated by semiconductor laser configurations with emitting mirrors divided into isolated elements to suppress parasitic in-plane generation. For two adjacent plane-mirror resonators, the authors calculate diffraction c…
This paper examines the existence and use of a characteristic temperature in suspensions, at which the density and adiabatic compressibility contrasts between suspended particles and the continuous liquid become small and the ultrasonic velocity becomes nearly independent of particle concentration. …
This paper investigates how the inductance of a superconducting solenoid should be defined and measured when its winding carries direct current and is subject to changing magnetic flux. Experiments on a niobium zirconium solenoid compared small-signal alternating-current measurements, giving a dynam…
This paper examines how the finite proper volume of molecules affects theoretical calculations of collisional broadening of spectral lines in gases. The authors compare the usual point-molecule treatment with models that impose a short-range cutoff, showing that neglecting molecular size leads to di…
This paper reports the generation of coherent radiation in homogeneous n-type and p-type gallium arsenide samples excited by pulsed electron bombardment. The authors compare the inversion conditions in GaAs with those in narrower-gap semiconductors, argue that the relevant electron-gas temperature m…
This paper reports experimental studies of a solid-state optical quantum generator based on calcium fluoride crystals containing divalent dysprosium ions produced by gamma irradiation of Dy-doped CaF2. The authors examine absorption and luminescence spectra, pulsed lasing thresholds for crystals of …
This paper investigates how external electric fields, steady illumination, photochemical surface changes, adsorbed molecules, and dye adsorption affect capacitor photo-emf spectra in TlJ, AgBr, and ZnO semiconductor layers. Measurements on vacuum capacitor cells show that spectral changes and polari…
This paper examines limitations in determining electron temperature from the intensity ratio of neutral helium lines, especially the 4713 Å and 4922 Å lines commonly used in plasma diagnostics. The authors analyze how electron collisions at increasing plasma density produce transitions among helium …
This paper analyzes an analogue of thermal explosion in steady laminar flow of a chemically inert viscous incompressible liquid through a circular tube, arising from viscous energy dissipation when viscosity depends strongly on temperature. The governing hydrodynamic and heat conduction equations ar…
The paper develops a quasi-one-particle approximation for a homogeneous Coulomb many-particle electron system starting from the random-phase approximation for the mass operator. By replacing the unperturbed Green function with the full Green function and averaging the dynamically screened interactio…
This paper investigates the mechanism responsible for additional radiation peaks observed in pulsed neon discharges when the discharge current changes sharply, especially under shunting by a low resistance spark gap. The authors reject explanations based on population inversion or altered recombinat…
This paper reports an experimental attempt to obtain stimulated near-infrared emission from cadmium telluride under pulsed fast-electron excitation. Small p-type CdTe crystals at 10 to 15 K were irradiated with 150 keV electron pulses, and emission from polished lateral faces forming an optical reso…
This paper examines the range of validity of the quadratic Mott-Gurney law for space-charge-limited emission currents in dielectric films, a central question in dielectric electronics. Starting from the exact drift-diffusion formulation for a dielectric layer between metallic contacts, the authors c…
This paper examines an effect observed when nuclear reactions or charged-particle scattering occur in single-crystal targets, where the ordered arrangement of nuclei produces local distortions in angular distributions near crystallographic axes. The author develops estimates for the angular size of …
This paper reports measurements of stimulated conductivity and electroluminescence in sandwich cells made from sublimated zinc sulfide films at 77 K. The authors examine current-voltage and brightness characteristics under high applied voltage and after ultraviolet irradiation, finding that above a …
This paper studies the asymptotic behavior of classical Green functions for a gas of elastic spheres, starting from a previously derived closed kinetic equation for the basic Green function. It first treats a short path regime by successive approximations, obtaining an explicit damped form and an as…
This paper reports a hysteresis effect observed in the reverse current-voltage characteristics of diffusion silicon p-n junction photodiodes at sufficiently large voltages, both in darkness and under illumination. The authors describe steady-state and pulsed measurements at different temperatures an…
This paper examines Maxwell electrodynamics in Riemannian space, especially in Friedmann cosmological models, and derives wave equations for the electromagnetic four-potential including curvature terms through the Ricci tensor. It argues that spatial components of electromagnetic quanta acquire an e…
This paper investigates regular undamped intensity pulsations in optical quantum generators by modeling a laser resonator with two oscillation modes. Starting from field, polarization, and population equations, the authors derive coupled multimode equations and reduced rate equations for cases of we…
This paper investigates the repulsive interaction potentials of noble gas atoms using elastic scattering of fast neutral beams in gas targets. Assuming a power-law form for the repulsive potential, the authors derive potential parameters from the energy dependence of small-angle scattering cross sec…
The paper investigates infrared quenching of the photocurrent in cadmium sulfide crystals and proposes that the kinetics produced by short infrared pulses can be used to determine recombination-center parameters. Using a two-center model with slow r-centers and fast s-centers, the authors analyze ph…
This paper examines the Brownian coagulation rate of aerosol particles when the mean Brownian free path is small but not negligible relative to particle radius, a regime where the classical Smoluchowski diffusion treatment requires correction. The coagulation problem is reformulated as stationary ab…
This study examines the formation and growth kinetics of InSb in thin double films of indium and antimony using fast electron diffraction, with emphasis on direct observation rather than indirect electrical measurements. Successively deposited In and Sb layers were annealed at 200, 240, and 250 degr…
This paper describes the development of pulsed iron-free betatrons intended to produce intense ring beams of high-energy electrons. The authors discuss an air-core electromagnet design based on flat spirals and a central solenoid, its field symmetry and stability properties, capacitor-bank powering,…
This paper examines the calculation of dielectric permittivity and conductivity in an electron phonon system with consistent treatment of screening effects, emphasizing the role of direct Coulomb interactions. Using the Bardeen Pines Hamiltonian and the method of retarded two time Green’s functions,…
This paper examines the structure of solutions to the chain of kinetic equations derived from the Liouville equation for a finite system of interacting gas molecules. It argues that, besides ordinary mechanical interactions within a group of particles, the equations contain integral interaction term…
This paper examines the decay of homogeneous turbulence in a weakly conducting incompressible liquid placed in an external magnetic field, under the assumptions of small magnetic Reynolds number and negligible nonlinear terms in the Navier, Stokes equation. By deriving equations for velocity correla…
The paper treats the initial value problem for the kinetic equations of a plasma with the Landau collision integral in a homogeneously expanding or compressing flow. By transforming from particle velocity to peculiar velocity and then to scaled velocity and a new time variable, the problem is reduce…
This paper reports measurements of impurity photoconductivity in germanium doped with group V donors, specifically antimony and arsenic, at photon energies below the donor ionization energies. Spectral photoconductivity curves at low temperature show distinct maxima at long wavelengths, whose positi…
This paper examines the stability boundary for collisionless self-gravitating systems, seeking an analogue of the Jeans critical wavelength for media described by collective gravitational interactions rather than particle collisions. Using the linearized Boltzmann and Poisson equations in a locally …
This paper derives spherical aberration formulas for a combined electric and magnetic quadrupole lens whose axial field distribution is approximated by a rectangle. To avoid the singular field derivatives that arise at the sharp lens edges in third-order trajectory equations, the authors use perturb…
This paper analyzes rotation of the plane of polarization in tetragonal electro-optic crystals of the ADP type under an electric field directed along the optical axis. Using the optical indicatrix, it derives relations for the rotation of the indicatrix section, the change in birefringence, and the …
This paper derives relaxation equations for the exchange of energy between rotational and translational degrees of freedom in diatomic molecules colliding with atoms or electrons when rotational transition interactions are too strong for ordinary perturbation theory and the collision is not adiabati…
This paper studies the Borchers equivalence class of interpolating fields in a theory of one neutral scalar interacting field under Bogolyubov’s stronger causality condition for the S matrix. Using Medvedev’s quasinormal product and a recurrence definition of the Wick chronological product, the auth…
This paper examines self-similar, centrally symmetric motions of a relativistic gas in general relativity, using the Einstein equations together with the relativistic equations of gas motion for a spherically symmetric metric. By introducing similarity forms for velocity, pressure, specific volume, …
The paper examines competing interpretations of anomalously large photovoltages in semiconductor films, contrasting the usual microphotobattery model with the single high-resistance photocell model proposed by Brandhorst and Potter. By reanalyzing the underlying transport and Poisson equations, the …
The paper reports measurements of the angular distribution and differential cross section for the reaction gamma plus proton to pi-plus plus neutron on liquid hydrogen at a photon energy near 230 MeV. Pi-plus mesons were identified with a scintillation counter telescope by range selection and delaye…
This paper examines the conductivity and photoconductivity of thin amorphous selenium arsenic layers containing oxygen under strong electric fields. Layers prepared by vacuum evaporation were measured at room temperature with different electrode materials, compositions, thicknesses, illumination lev…
