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
The study investigates the ionic composition of the positive column of glow discharges in helium and argon with a small admixture of mercury vapor at pressures from 5 to 50 mm Hg. Using a mass spectrometer designed for high pressure gas phase ion processes, the authors examine pressure and current d…
This paper examines the negative resistance regime and the subsequent stable stimulated state in sublimated electroluminescent zinc sulfide films at 77 K. Using electroluminescence, probe measurements of the voltage drop in the phosphor, current voltage characteristics, thermoluminescence, and after…
The paper examines propagation of high frequency waves governed by a hyperbolic second order equation whose coefficients are random functions of space and time. Using a geometrical optics approximation, it separates the eikonal phase into an averaged part and a random fluctuation, expresses the latt…
This paper develops a one-electron perturbation treatment of the short-wavelength region of x-ray K-absorption spectra for single crystals and polycrystalline samples. The crystal potential is separated into a quasiatomic central part, treated exactly, and a residual crystalline field, treated to fi…
This paper examines how the operational metric of space-time may be defined when the only available physical signals are governed by nonlinear field equations, for which Lorentz invariance need not imply a constant signal velocity. Using a scalar field derived from a variational principle, it argues…
The paper analyzes the covariant form of the Dirac equation in Riemannian space using tetrads, Lorentz group generators, and spinor parallel transport. By squaring the curved-space Dirac equation, it identifies an additional curvature-dependent term in the effective mass relation, interpreted as a s…
The paper extends the one-dimensional factorization of the scattering matrix for the Schrödinger operator to the multidimensional case. It introduces solutions defined through a modified Green function depending on a direction parameter and, assuming unique solvability of the associated integral equ…
This study examines the dark conductivity and photoconductivity of bilirubin layers, a bile pigment structurally related to porphyrin pigments but containing an open conjugated chain. Bilirubin films between platinum electrodes were measured in high vacuum and under controlled oxygen pressures, with…
This study examines the formation of dense modifications of germanium and silicon under the combined action of high pressure and shear stress at room temperature. Using a calibrated high-pressure apparatus, the authors compressed germanium to 120 kbar and silicon to 200 kbar while applying shear str…
The paper examines conditions under which the standard classical formula for photocurrent shot noise may fail in a quantum system. Using perturbation theory for an optically thin transparent semiconductor illuminated by monochromatic radiation near the red edge of the absorption band, it derives the…
This paper examines the emergence of a second sound branch in a weakly nonideal Bose gas beyond the random-phase approximation. Starting from equations of motion for one-particle and density Green functions, the author introduces quasiparticle operators, derives a matrix Green function with interact…
This study investigates photodisintegration of the oxygen-16 nucleus, focusing on transition probabilities to several low-lying states of nitrogen-15 and on the total gamma absorption cross section above the giant resonance region. Photoproton energy spectra from the oxygen-16 gamma,p reaction were …
This paper develops a theory for the single-pulse operating regime of optical quantum generators that includes both the pulse-generation stage and the preceding accumulation of excitation energy in the active medium. It analyzes how amplified spontaneous emission shortens the effective excited-state…
This paper formulates the problem of a plane explosion in an ideally conducting perfect gas subject to an initially uniform magnetic field inclined at an arbitrary angle to the explosion plane. Using one-dimensional magnetohydrodynamic equations and shock-front jump conditions, it derives general sy…
This paper reports measurements of the optical reflection spectra of ZnSiP2 single crystals at room temperature beyond the fundamental absorption edge, with the aim of obtaining information on their band structure. Using natural crystal surfaces and polarized as well as unpolarized incident radiatio…
This study examines the energy spectrum of radiation defects formed in n-type and p-type silicon single crystals after irradiation by gamma quanta, 1 MeV electrons, and fast reactor neutrons over a broad range of integral fluxes. The authors combine temperature dependences of conductivity and Hall c…
The paper develops a rigorous solution for diffraction of a linearly polarized plane electromagnetic wave by several perfectly conducting spheres arranged in a linear system, with an arbitrary angle between the incident wave vector and the common axis of the spheres. Using Debye potentials, the elec…
This paper studies transformation operators and scattering data for the radial Schrödinger equation with a repulsive potential whose singularity at the origin is stronger than inverse square. Under differentiability, monotonicity, and integrability assumptions on the leading singular part and a pert…
This paper applies a fixed-source meson-nucleon model with three nucleon states to meson scattering problems, extending earlier exact solutions for the discrete spectrum to continuous-spectrum scattering states. The authors solve the Schrödinger equation for a meson incident on a stable B particle, …
This paper develops an energy balance treatment for radiation noise in solid state optical quantum generators, relating noise radiation density to resonator losses, gain, luminescence, and scattering of the generated flux. The authors derive spectral and integral expressions for noise produced by lu…
This paper examines how substrate temperature during oblique deposition affects the spectral distribution and sign inversion of the high-voltage photoelectric effect in thin CdTe layers. Measurements of short-circuit current spectra for CdTe films deposited at different substrate temperatures show t…
This paper formulates thermocapillary hysteresis as a form of capillary hysteresis arising when surface tension varies with height because of a temperature distribution along a capillary. Using the capillary rise balance and a potential energy criterion, it identifies stable and unstable equilibrium…
This paper examines a gallium arsenide semiconductor quantum generator using a plane Fabry Perot resonator, motivated by limitations on output power in conventional resonator geometries caused by absorption, scattering, thermal effects, and electron penetration constraints. An n-type GaAs plane-para…
The paper studies Green’s functions for a Bardeen-type model Hamiltonian with a factorizing interaction kernel at nonzero temperature, extending earlier zero-temperature results. Using an approximating quadratic Hamiltonian, the argument estimates derivatives of the free-energy difference with respe…
This paper reports a neutron-diffraction investigation of manganese telluride at temperatures above and below its antiferromagnetic transformation, motivated by the compound’s combined semiconducting and magnetic properties. Diffraction patterns measured between 120 and 373 K confirm the NiAs-type c…
The paper analyzes free vibration frequencies in branched chains of diatomic molecules, distinguishing two structural types and separating small oscillations into in-plane and out-of-plane components. It formulates equations of motion for the displacement components, reduces the frequency problem to…
The paper studies the Milne problem for radiative transfer in a semi-infinite plane layer with an arbitrary scattering phase function, allowing azimuthally inhomogeneous solutions. It formulates the problem as an operator equation in weighted Bochner spaces, establishes mapping and convergence prope…
This paper reports a neutron diffraction study of spin ordering in hexagonal W type ferrites of composition BaCo x Fe2-x Fe16O27, using polycrystalline and single crystal samples with varying cobalt content over 77 to 770 K. The authors compare measured magnetic reflection intensities with calculati…
The paper proposes a class of stable superdense quasiparticles, termed planckeons, constructed from Planck-scale combinations of gravitational, quantum, and relativistic constants. It argues that such objects would have a mass of about 10^-5 g, a size equal to both their gravitational radius and int…
This paper analyzes gradient instability in semiconductors carrying current in nonuniform electric and magnetic fields, extending earlier treatments based mainly on carrier concentration gradients. Using linearized continuity, transport, and Poisson equations in a WKB approximation, the authors deri…
This paper examines flute, or interchange, instability in an ideally conducting plasma confined in toroidal discharges of Tokamak type, where the longitudinal magnetic field is much stronger than the azimuthal field and the usual straight-column Suydam criterion is not directly applicable. The autho…
This paper constructs homogeneous axisymmetric cosmological solutions of the Einstein and Maxwell equations for a perfect fluid with a magnetic field directed along the symmetry axis in a comoving synchronous frame. For dust matter, the field equations are reduced to evolution equations for two scal…
This paper examines a proposed generalization of gas kinetic theory beyond the usual Boltzmann statistical assumption that phase density is proportional to the total number of particles or mean density. Starting from the Liouville equation, it distinguishes symmetric and asymmetric distribution func…
This paper studies the eigenvalue curves of Laplace’s tidal equation for free and forced oscillations of the atmosphere and ocean on a rotating planet, focusing on the asymptotic regime of small inverse equivalent-depth parameter. Using a reduction of the tidal system to a second-order equation and …
This paper analyzes how radiation damping from synchrotron emission modifies the motion of a relativistic charged particle in a homogeneous magnetic field. Starting from the relativistic equation of motion with the Landau and Lifshitz radiation-reaction force, it derives component equations, shows t…
This paper analyzes plasma diffusion in an axisymmetric toroidal discharge, emphasizing that toroidal geometry can enhance even classical particle losses beyond those expected in a straight discharge. Using quasi-cylindrical coordinates and Ohm’s law on magnetic surfaces, the authors derive an expre…
This text presents a contents page for a 1966 issue, listing articles in physics, technical physics, geophysics, and crystallography, with page references. The topics include high-frequency photoconductivity of organic dyes, plasma drift instabilities, radiation disturbances in silicon crystals, las…
The paper examines the physical origin of anomalously large photovoltages in semiconductor films, focusing on whether the elementary mechanism is a set of microscopic electron-hole junctions or a photodiffusion, Dember-type process in microregions. It compares the expected voltage behavior for these…
This paper reports experiments using a solution of a cyanine dye analog as a liquid fast-acting shutter for Q-switching a neodymium glass optical quantum generator emitting at 1060 mµ. The dye solution, placed in a plane-parallel cuvette inside the resonator, enabled single giant-pulse generation wi…
This paper derives general formulae for the electromagnetic decay of a positive parity spin 3/2 baryon resonance into a spin 1/2 baryon and photon, and for its electroproduction in electron baryon scattering. The transition current is written in terms of invariant form factors, then specialized to t…
This paper examines how positron annihilation measurements of angular correlations in metals are affected by interactions between a positron and the surrounding electron gas. Using Green function methods for a compressed electron gas, it decomposes the two quantum annihilation probability into contr…
This study reports absolute cross sections and energy dependence for photoneutron reactions on the Li7 nucleus from the reaction threshold at 7.25 MeV to 50 MeV. Neutron yields were measured using a highly enriched lithium target and an apparatus designed to minimize variation of neutron detection e…
This paper proposes a modification of the Monte Carlo method for stationary rarefied gas flows that reduces the need to store the full molecular velocity distribution function. Using a quasi-Maxwellian molecular model with an effective collision cross section inversely proportional to relative speed…
This paper derives kinetic equations for weakly interacting, weakly excited superfluid Bose systems and solves them in the hydrodynamic approximation. Starting from a Bogolyubov quasiparticle Hamiltonian with external sources, the author formulates equations of motion for two-time temperature Green …
The paper addresses the calculation of physical constants of polycrystalline materials, textures, and mixtures for properties represented by symmetric tensors of even rank, including dielectric and elastic properties. It argues that if effective constants are to be treated as mathematical means of s…
The paper examines how conservation laws in Einstein’s theory of gravitation are connected with the transformation properties of the gravitational-field Lagrangian. Starting from the Lagrangian form of the Einstein equations, it computes the variation of the Lagrangian density under an infinitesimal…
This paper investigates the photodielectric effect in vacuum-deposited phthalocyanine layers using capacitance and dielectric-loss measurements under illumination at room temperature. The authors model the sample as a capacitance shunted by the dark or light conductivity of the phthalocyanine and co…
The paper studies the structure of vector and axial current matrix elements for baryons within broken \(\widetilde U(12)\) symmetry, using a spurion formalism that restores formal invariance by treating particle momenta as components of higher-dimensional tensors before reducing to physical componen…
This paper develops a kinetic description of relaxation and frequency shifts in a discrete spectrum under the approximation of instantaneous collisions, relaxing the earlier assumption that each collision completely restores equilibrium. Starting from a density matrix evolving freely between Poisson…
