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 derives a universal relation between absorption and spontaneous luminescence spectra in semiconductors under high pumping intensities, extending analogous relations previously developed for complex molecules. Assuming equilibrium carrier distributions within the conduction and valence ban…
This paper develops a perturbation theory for the Green’s function of conduction quasiparticles interacting with randomly distributed impurity particles while treating the periodic crystal-lattice field in the unperturbed Hamiltonian. It formulates averaging over impurity positions within crystal ce…
This study examines how boron impurity affects the phosphorescence and thermoluminescence of synthetic diamonds produced from graphite in a metal solvent. After x-ray irradiation, boron-containing samples showed long-lived blue phosphorescence and a strongly intensified thermoluminescence peak near …
A quantum theory is formulated for the magnetic-field-even coefficients of hopping transport in disordered lattices, with emphasis on electrical conductivity and thermopower for nonadiabatic small polarons and impurity conduction in the strong electron-phonon coupling regime. Using Kubo formulas, pe…
The paper formulates Einstein’s gravitational field equations as first-order nonlinear systems analogous to standard relativistic wave equations for elementary particles. Treating the metric tensor and Christoffel symbols as independent components of a single multicomponent field, it rewrites the va…
This paper reports electron paramagnetic resonance measurements of conduction electrons in sodium and sodium based liquid alloys over the range from minus 200 to 300 degrees Celsius, with emphasis on the temperature and impurity dependence of the resonance linewidth. The authors measure dispersed so…
This paper solves the kinetic equation for charge carriers in semiconductors with a narrow conduction band under strong electric fields, motivated by organic molecular crystals whose band widths may be comparable with thermal energy. Using a nearest-neighbor one-dimensional band spectrum, acoustic p…
An experiment is reported on the electromotive force induced along an external magnetic field by a liquid sodium flow whose velocity field lacks mirror symmetry, corresponding to the predicted magnetohydrodynamic alpha effect. The apparatus used interlacing perpendicular channels to create a stepwis…
The paper reformulates the Bogoliubov, Medvedev, and Polivanov axiomatic S-matrix approach in terms of vacuum expectation values of chronological operators, called generalized B-functions. It specifies the required linear properties of these generalized functions, including distributional structure,…
This paper investigates whether plasma heated turbulently by a strong circumferential electric current can remain confined in a toroidal magnetic configuration after the heating current is switched off. Experiments on the Vikhr-2 device used titanium-hydride plasma injection, a strongly corrugated q…
This paper derives general solutions for hypersonic magnetohydrodynamic flows of an anisotropically conducting inviscid gas in a magnetic field, under the assumption that pressure gradients can be neglected. With constant interaction frequency, load parameters, and Hall-related anisotropy parameters…
This paper examines the use of Fock expansions in the direct variational calculation of van der Waals dispersion forces, taking the interaction of two hydrogen atoms as the basic test case. By transforming the first-order perturbation equation to hyperspherical variables, the author shows that an ex…
The paper analyzes open resonators formed by equidistant conducting curves or surfaces and seeks parameter regimes in which only one transverse mode is supported. Using high-frequency asymptotics for the Helmholtz equation, the transverse-mode problem is reduced to one-dimensional Schrödinger-type e…
This paper derives experimental consequences of assuming that a particle form factor is analytic in the complex momentum-transfer plane with the standard cut and satisfies the growth restrictions of local field theory. Using results from complex function theory, including a maximum principle, the Ph…
This paper examines radiative processes relevant to colliding electron positron beam experiments, focusing on photon emission in electron positron scattering. Using methods previously applied to electron electron collisions, it derives cross sections for emission of photons of arbitrary energy into …
The paper reformulates the equations of motion for a self-gravitating, centrally symmetric medium in general relativity. Starting from the stress-energy conservation laws and Einstein field equations, it introduces the radius and a mass-like Lagrangian coordinate as independent variables, reducing t…
This paper examines similarity criteria for optical fields in turbid media, focusing first on the established use of specific scattering as a criterion when scattering indicatrices are identical. Laboratory experiments measured relative brightness at varying optical depths and directions in media wi…
This paper examines the theoretical justification of transport laws and kinetic coefficients for isotropic dense multicomponent media within nonequilibrium statistical mechanics. Using Zubarev’s nonequilibrium ensemble method, it expands the distribution function about a local equilibrium form and d…
This paper analyzes reference-beam-free holography for three-dimensional holograms, extending earlier results for two-dimensional recording media where reconstruction yields the Patterson function of the object. Using a Fourier representation of the recorded interference intensity and applying the W…
This paper examines the growth and disappearance of two-dimensional zirconium crystals adsorbed on crystallographically distinct regions of tungsten and niobium single-crystal surfaces. Using field-emission microscopy and Arrhenius analysis of temperature-dependent growth and two-dimensional sublima…
This paper examines reported density changes in rotating liquid helium, especially the proposed compaction of helium II near the lambda transition, and tests whether the effect can be attributed to centrifugal compression or to thermal causes. After noting that the compressibility required to explai…
This paper reports a capillary optical micromethod for measuring the refractive index of very small quantities of structurally modified water produced by vapor condensation on glass and quartz surfaces. The method treats liquid in a quartz capillary as a cylindrical lens, uses immersion matching to …
This paper examines the hidden dynamical symmetry of the relativistic Kepler problem, focusing on the Dirac equation in a Coulomb field and the residual twofold degeneracy of levels with equal absolute Dirac quantum number. Using the Johnson, Lippmann integral of motion and its nonrelativistic limit…
This paper treats radiative diffusion in a plane layer of large optical thickness illuminated by parallel rays, extending earlier isotropic results to anisotropic scattering. Using integral equations for the source function and intensity, it derives the asymptotic radiation field in the deep layers …
This paper reports electro-optical measurements of the temperatures of organic liquids compressed by shock waves at pressures up to about 200 kbar. Shock-front luminosity was recorded with photomultiplier and oscilloscope methods, and brightness temperatures were obtained for toluene, methanol, hexa…
This paper examines the production of temperatures between the hydrogen triple point and the critical temperature of helium by pumping saturated vapor from the surface of solid hydrogen. The authors analyze the relevant vapor pressures, sublimation heat, heat capacity, thermal conductivity, and orth…
This paper examines the role of mercury vapor in producing anomalous photoconductivity in amorphous selenium films, addressing whether mercury creates long trap centers or merely lowers a preexisting nonphotoactive resistance. The authors compare spectral photoconductivity in pure films and in films…
The study examines secondary ion emission and elastic scattering from a 50 percent W, Mo alloy under bombardment by low energy K+ ions, with comparison to pure tungsten and molybdenum targets. Energy spectra measured using a high resolution cylindrical capacitor analyzer show distinct peaks correspo…
This study examines how the degree of fluorescence polarization in porphyrin derivatives depends on emission wavelength, particularly at liquid nitrogen temperature where vibrational structure is partially resolved. Measurements were made for porphyrins, chlorins, and metal complexes of azabenzoporp…
This paper studies quasioptical transmission lines whose phase correctors are separated by unequal distances, a case in which ordinary eigenwaves with identical field repetition at each corrector do not exist. It introduces the concept of generalized eigenwaves, defined by field similarity between c…
Infrared reflection spectra of n-type and p-type GaAs crystals with different carrier concentrations were measured over wavelengths from 1 to 40 micrometers to examine optical properties, effective ionic charge, and carrier effective masses. The reflection minimum near 35 micrometers in lower-concen…
A scheme is proposed for a gas laser producing short-wavelength, ultraviolet photons through transitions between the ground state and a resonantly excited state of inert-gas atoms. The argument is based on dissociative recombination of electrons with molecular ions in inert-gas mixtures, which can s…
This paper investigates the angular and energy distributions of secondary ions emitted when heated tungsten and molybdenum targets are bombarded at glancing incidence by alkali ions with energies of 1 to 3 keV. Using movable-probe angular measurements and electrostatic analysis of energy spectra, th…
This paper reports an experimental determination of the fast neutron spectrum in the core of a highly enriched uranium fast reactor, with emphasis on estimating the fraction of neutrons at energies up to 24 MeV. The authors use threshold indicators, fission chambers, and activation measurements to o…
The paper develops a group-theoretic and functional formulation of free quantized spinor fields with \(2(2s+1)\) components for arbitrary spin, motivated by later study of the covariant structure of causal \(S\)-matrix elements. Using a rigged Hilbert space induced by a unitary irreducible represent…
This paper examines how exchange interactions between magnetic ions can affect the relativistic shift of the Mössbauer spectrum, particularly through changes in spin ordering at magnetic transition temperatures. Using prior theoretical arguments based on a Debye phonon model and nearest-neighbor exc…
This paper analyzes quasistationary nuclear states in an upper conical adiabatic potential well arising near intersections of electronic terms of the same symmetry, with emphasis on triatomic systems near an equilateral configuration. By separating angular variables and imposing single-valuedness of…
This paper develops a quantum mechanical treatment of the fine structure of the vibrational-rotational spectrum of water vapor, addressing the theoretical determination of line centers, intensities, and half-widths where experimental data are incomplete. The authors formulate an approximate Hamilton…
This paper analyzes Fresnel diffraction by opaque objects with rectilinear edges, including a narrow screen, slit, and half-plane, when the incident wave surface is nonspherical, specifically a paraboloid or parabolic cylinder. Using the Huygens-Fresnel principle, it derives expressions for the ligh…
This paper analyzes ionizing shock waves in a gas placed in an arbitrarily oriented magnetic field, treating the wave structure through gasdynamic and magnetohydrodynamic equations with viscosity, thermal conductivity, and electrical conductivity, while neglecting the Hall effect. It shows that the …
This paper examines the effective electrical conductivity of two component heterogeneous media when the conductivities of the constituents differ by more than two orders of magnitude, a range in which Odelevskii’s formula is reported to disagree with experiment. The authors derive approximate expres…
This paper examines how orbital states affect the theory of indirect exchange in magnetically ordered crystals modeled by a linear three-center, four-electron chain of the type cation, anion, cation. Using antisymmetrized wave functions classified by permutation and cubic-group representations, and …
This paper derives retarded Green’s functions for a quantum Fermi system of charged particles interacting through the Coulomb potential in a compensating background, with collisions included in a kinetic equation framework. Starting from the equation for the one-particle quantum distribution functio…
The paper investigates flash electroluminescence in organic liquid dielectrics exposed to strong steady electric fields, focusing on randomly occurring light pulses observed in a wide range of liquids. Using sealed electrode cuvettes, photomultiplier detection, gas saturation, and comparisons with s…
This paper analyzes a semiconductor dielectric heterocontact in which the semiconductor has a lower electron affinity than the dielectric, producing a potential well for electrons in the near-contact dielectric layer. Using kinetic and electrostatic equations with boundary conditions at the contact,…
This paper examines a mechanism of radiationless energy transfer between donor and acceptor molecules mediated by virtual excitations of molecules in the surrounding medium, rather than by direct dipole-dipole interaction alone. The authors develop a perturbative treatment for a one-dimensional orde…
The paper examines whether flute instabilities in a magnetically confined, low beta plasma can be stabilized by an external feedback system that controls the potential of a surface placed between the plasma and the chamber wall. Using a cylindrical plasma model with an effective radial gravity term …
This paper examines how diffuse scattering characteristics of aggregates of absorbing particles depend on absorption coefficient, particle size, layer thickness, wavelength, dielectric constant, and particle arrangement. Starting from the macroscopic Maxwell equations, it derives a similarity relati…
