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 paper analyzes propagation of the boundary between superconducting and normal phases in type-II superconducting thin films, where the film thickness is small compared with the magnetic-field penetration depth. Starting from the Maxwell-London equations, the authors introduce current functions fo…
This paper examines the relationship between magnetic rotation dispersion and refractive index dispersion for the diamagnetic La3+ ion in aqueous lanthanum chloride solution, with particular attention to Becquerel’s formula and Serber’s coefficient. Refractive index dispersion was measured interfero…
This paper constructs an analytic representation of the electron dispersion law of copper near the Fermi surface using a truncated Fourier expansion fitted by least squares to previously calculated ab initio energy values. The resulting five term expression reproduces the selected energies with a ma…
The paper reports an electrostructural effect in oriented nematic liquid-crystal films, studied mainly in n-azoxyanisole with analogous observations in n-azoxyphenetole and mixtures. By applying voltage to thin films and observing the transmitted light, film surface, diffraction patterns, polarizati…
This paper proposes a model for the accumulation and redistribution of thermal energy in an atmospheric layer where heat transfer is intermittently blocked and released by free convection. Using the heat conduction equation with an effective thermal diffusivity that switches between an accumulation …
The paper examines the multiple-scattering effect in ion scattering by crystals, focusing on why narrow energy peaks are most clearly observed when the glancing angle is close to half the scattering angle. Using a two-atom scattering model with the Firsov interaction potential, the author derives co…
This paper proposes an averaged formulation for the radiation transport equation in low-temperature plasma, addressing cases where strong nonmonotonic spectral dependence of the absorption coefficient makes conventional Planck, Rosseland, or multigroup averaging inefficient or inaccurate. For plane-…
The paper proposes a regularization of singular operator expressions in quantum field theory, applied to the Hamiltonian of the scalar fourth-power interaction. It constructs a modified Fock-type Hilbert space using a positive symmetric kernel and defines corresponding analogues of annihilation and …
This paper analyzes the spectrum of acoustic turbulence in a compressible potential flow represented as an ensemble of interacting sound waves. Using normal wave variables, resonance considerations, and dimensional Kolmogorov-type arguments, it estimates the nonlinear interaction cone and interactio…
The paper formulates a mathematical principle intended to express the equivalence of physical objects with respect to a physical law, called phenomenological symmetry. It defines physical structures on two sets through analytic functional relations invariant under permutations of selected elements, …
The paper examines whether impurity ions of higher charge in a plasma carrying a strong electric current can attain directed energies sufficient for nuclear synthesis with the principal ions. Using Gurevich’s two stationary states of impurity ion motion under Coulomb conductivity, it estimates react…
The paper treats the Milne problem for linearly polarized radiation in a semi-infinite plane atmosphere with Rayleigh scattering, constant total flux, and no incident external radiation at the boundary. It formulates the transfer equation for two polarization components, derives moment equations and…
This paper examines whether weak magnetic fields can grow in a medium with acoustic turbulence, using the small parameter provided by the short correlation time of acoustic fluctuations. Treating the velocity field statistically and applying perturbation theory to the magnetic induction equation, it…
The paper refines earlier calculations of the microwave and far-infrared rotational absorption spectrum of the water-vapor dimer, using a linear rigid dimer model with hindered internal rotation about the hydrogen bond. Replacing the harmonic approximation for the torsional barrier by a cosine poten…
The paper develops a general treatment of spin motion for particles in storage rings or accelerators with arbitrary electromagnetic fields, assuming the existence of a closed equilibrium orbit. It gives a physically transparent derivation of the spin precession equation including Thomas rotation, th…
This paper examines the resolving power of three-dimensional holograms recorded in volume photosensitive media, where the usual aperture-based treatment of planar holograms is insufficient. Using the kinematic theory of diffraction by three-dimensional periodic structures, the authors derive an inte…
Observations of the pulsar CP 0808 at 60 to 110 MHz with the Pushchino DKR-1000 radio telescope are analyzed to characterize its meter-wave radio emission and short-period subpulse behavior. The study finds that pulses consist of one to three subpulses separated on average by 53.6 ms, forming a clas…
The paper examines special noncovariant coordinate conditions in general relativity defined by setting selected components of gravitational energy, momentum pseudotensors to zero. It argues that, although such conditions appear nonlinear and unusual, they are satisfied by several exact solutions and…
This paper examines gravitational pressure in a conformally flat Friedmann-Lobachevsky space with metric tensor proportional to the Minkowski tensor. It derives expressions for the Christoffel symbols, curvature tensor, and Einstein equations in terms of the conformal factor, then specializes to a d…
The paper formulates the three-fragment scattering problem with rearrangement in coordinate representation, focusing on energies where only two-fragment bound reaction channels are open. By decomposing the total wave function into channel components, the authors derive Faddeev-type nonsingular integ…
This paper examines the stability of a magnetically confined plasma with trapped particles when the plasma pressure is finite, extending earlier zero pressure considerations of trapped particle instability. Using a qualitative electrostatic perturbation analysis, it compares the dielectric contribut…
Electron paramagnetic resonance spectra of Cu(II) were measured in cesium phosphate glasses containing 20 to 50 mol.% cesium oxide and compared with sodium phosphate glasses of analogous compositions. Using room and liquid-nitrogen temperature EPR measurements and spin-Hamiltonian parameters, the st…
This paper derives approximation formulas for the polarizability tensor of a homogeneous dielectric body and for the electrostatic capacitance of a conductor of arbitrary shape. The formulas are expressed through surface integrals over the boundary, with error estimates showing geometric convergence…
The paper studies quasisymmetric conformally Euclidean spaces of dimension at least four and gives coordinate conditions for when such spaces are symmetric, including a classification of the real parts of their absolutes. It then applies this geometry to a relativistic cosmological model with nonzer…
The paper examines how integral conservation laws in general relativity can be derived from the covariant differential conservation law for a symmetric energy momentum tensor when spacetime admits a group of motions. By contracting the tensor with Killing vectors and applying Green’s formula in a Ri…
This paper examines the statistical properties of photocurrents produced by multiquantum photoelectric registration of radiation, extending earlier treatments focused on ordinary single-quantum detection. Within a semiclassical framework, it generalizes Mandel’s photoelectron-counting formula to a k…
This paper examines how molecular anharmonicity affects the apparent vibrational relaxation time during excitation behind shock waves and during deactivation. Using shock tube ultraviolet absorption measurements for a 10 percent oxygen and 90 percent argon mixture and for nitrogen, the authors show …
The study investigates the temperature dependence of stimulated and unstimulated currents in polycrystalline cadmium selenide powder photoresistors between 77 and 273 K. Using sandwich-type cells measured in a cryostat after thermal resetting, the authors recorded current-voltage characteristics bef…
This paper studies the nonlinear, nonstationary impingement of antiparallel rarefied electron-proton plasma flows in a one-dimensional electrostatic model, with Boltzmann electrons and ions described by the Vlasov equation coupled to Poisson’s equation. A discrete charged-layer numerical method with…
This paper examines the origin of the forbidden neutral oxygen lines at 6300 and 6364 Å in type I supernova spectra, focusing on the supernova in IC 4182. It argues that the observed emission can be explained by fluorescence in an expanding, initially highly ionized hydrogen envelope, analogous to t…
This paper analyzes ray oscillations in a two-dimensional open resonator formed by a circular mirror and a plane mirror. A finite-difference mapping for successive reflected rays is derived and linearized near the axial solution, then numerical calculations are used to identify nonresonant zones ass…
The paper studies reflection of a plane acoustic wave by a periodically corrugated surface whose boundary combines rigid convex arcs with straight segments satisfying an impedance condition. Using the Maliuzhinets formulation, the diffraction problem for the Helmholtz equation with quasiperiodicity …
This paper develops basic structures of matrix space motivated by a covariant formulation of spinor fields in general relativity. It defines matrix tensors built from position-dependent Dirac matrices, analyzes the subgroup of similarity transformations that preserves algebraic relations involving c…
This paper analyzes the stability of an inhomogeneous high-pressure plasma in a homogeneous magnetic field under the condition of very large beta and initially vanishing pressure gradient. Using a local dispersion relation for low-frequency, long-transverse-wavelength perturbations in a collisionles…
The paper introduces a formal notion of complex Markov chains by assigning complex amplitudes to events and paths, with ordinary probabilities recovered as squared moduli on true events. It defines homogeneous chains, their continuous limiting processes, and the associated Green function, then appli…
A microwave delayed-coincidence method was applied to measure short lifetimes of excited nuclear states populated in the alpha decay of Ra-223 and Bi-211. The apparatus used phase-shifted microwave shutters for alpha particles and conversion electrons, with prompt-coincidence curves obtained by low-…
This paper examines the spectral sensitivity and response speed of CdHgTe photoresistive radiation detectors intended for the 8 to 13 micrometer atmospheric window used by CO2 lasers. The authors synthesize and heat treat CdHgTe crystals, characterize carrier concentration and mobility by galvanomag…
This paper reports an electron paramagnetic resonance study of Dy2+ ions in CaF2 in the short wavelength submillimeter range near 0.34 mm at liquid helium temperature. Using a high resolution radiospectroscope, the authors measured resonance absorption lines for several orientations of the magnetic …
The paper derives a dispersion formula for the dynamic optical polarizability of the hydrogen atom in its ground state. Starting from the quantum mechanical sum over discrete and continuous spectra, it analyzes an integral representation based on Green functions and uses contour integration in the c…
This note proposes nonlinear light scattering by static optical inhomogeneities, such as impurities or inclusions in transparent media, as distinct from stimulated scattering seeded by dynamic fluctuations. Using the Rayleigh single-scattering approximation for small, widely separated spherical part…
The paper examines the use of Faddeev equations with a separable Hilbert-Schmidt expansion of two-particle amplitudes for calculating zero-energy electron scattering on ground-state hydrogen. The authors derive integral-equation systems for singlet and triplet scattering lengths, exploit symmetry re…
This paper derives an analytic expression for the flux of singly scattered neutrons emitted by an isotropic monoenergetic point source in a homogeneous infinite elastically scattering medium. Using the fundamental solution of the transport operator, the authors separate the uncollided and once-colli…
This paper reports measurements of low-frequency current oscillations in amorphous fused films of beta-carotene and in beta-carotene films containing protoporphyrin, using surface-type cells with tin electrodes under dark and illuminated conditions at room temperature. Oscillations appeared only in …
The paper examines how electron thermal conductivity affects the propagation of laser radiation absorption waves in vapor formed above a strongly heated solid surface. A one-dimensional gas-dynamic model with radiation absorption and heat conduction is solved numerically, and a traveling-wave formul…
This paper examines whether crystalline long-range order can exist in one- and two-dimensional classical many-particle systems with pair interactions at nonzero temperature. Using Bogolyubov’s quasi-average method and a classical analogue of Bogolyubov’s inequality, the argument relates a possible n…
This paper develops and applies a surface ionization method for determining electron affinity energies of atoms whose vapors contain atoms and molecules with temperature-dependent dissociation, a case not suited to earlier comparison techniques. The method compares mass-spectrometrically measured cu…
This paper experimentally examines the spatial intensity distribution of stimulated radiation from a ruby traveling-medium laser with a small circular diaphragm placed inside a plane-parallel resonator. Near-field patterns at the resonator mirror and far-field patterns in the focal plane were record…
This paper studies a quasilinear system arising in a model of groove oscillations of a rarefied plasma cylinder in a strong external magnetic field. The system couples two transport equations for particle density distributions with a Poisson equation for the electric potential, with the initial data…
This paper investigates whether bismuth films condensed at liquid helium temperature, previously known to form a superconducting amorphous phase, exhibit a critical thickness beyond which this metastable phase disappears. High purity bismuth was evaporated in high vacuum onto glass substrates cooled…
The paper studies one-dimensional continuous quantum statistical mechanical systems of bosons and fermions with binary interactions given by a finite potential with a hard core. It constructs the thermodynamic limiting Gibbs state on the inductive-limit C*-algebra for all positive activity and inver…
