SovietRxiv · Open Access in English
Rediscovering the Soviet scientific archive, in English
25357 full-text translations 14926 English PDFs 22539 abstracts
Showing 26 of 2226 papers in Physics
This paper investigates the previously uncertain 5.5-hour palladium activity produced in neutron reactions and tests whether it should be assigned to the nuclear isomer Pd-111m. The authors develop a radiochemical isomer-separation procedure based on the Szilard-Chalmers effect, using palladium sali…
This paper develops a theory of gas flow through highly porous bodies in the transition between Knudsen and viscous behavior, focusing on a proposed pseudomolecular regime in which intermolecular collisions are frequent relative to wall collisions but particle dimensions remain small compared with t…
This paper reports experiments on delayed X-ray emission from powerful pulsed discharges in xenon and in hydrogen, xenon mixtures, distinct from the initial breakdown radiation. Using a large porcelain discharge chamber driven by a 36 microfarad capacitor bank, with current, voltage, film, and scint…
This paper develops a thermodynamic treatment of binary solid solutions that are nearly completely ordered at temperatures well below the order disorder transition. For compositions close to stoichiometric, the free energy is expanded in terms of the small concentrations of atoms occupying foreign s…
A photographic emulsion stack irradiated at high altitude was examined for strange-particle interactions, and a stopping negative kaon event with subsequent hyperfragment emission was analyzed. Range, ionization, scattering, angular, and kinematic measurements of the primary and secondary stars iden…
This paper develops a diffusion-based theory of standing striations in the positive column of a gas discharge, addressing limitations of earlier treatments that mainly yielded traveling periodicities or relied on restrictive assumptions about radial ambipolar diffusion and thermodiffusion. Starting …
This study examines how gas temperature affects the relative intensities of fragment ion lines in the molecular mass spectrum of n-heptane, especially at electron energies near fragment appearance potentials. Using an MS-1a mass spectrometer with controlled ion-source temperature, the authors measur…
This paper reports experiments on single-crystal KBr subjected to strong electric fields at 300 to 450 degrees, where conductivity was found to increase sharply by factors of 100 to 1000 without the coloration or dendrite formation typical of related electrolysis phenomena. Using heated specimens wi…
This note estimates the coefficient for electron capture by neutral hydrogen atoms in triple collisions with hydrogen molecules, a process relevant to ionization in combustion, gas discharges, and the ionosphere. Using detailed balance, the capture coefficient for the reaction involving an electron,…
This study investigates the microwave rotational spectrum of 1,2-fluorochloroethane, a molecule of interest because it can exist in different isomeric configurations. The spectrum was calculated in the rigid asymmetric-top approximation for varying relative orientations of the carbon-fluorine and ca…
This paper reexamines the calculation of nuclear electric quadrupole moments within the shell model, using nuclear wave functions written as linear combinations of Slater determinants built from one-nucleon states with strong spin-orbit coupling. From conservation of angular momentum and isotopic sp…
This paper calculates the low-temperature magnetization of a uniaxial ferrite modeled as two ferromagnetic sublattices with strong intersublattice exchange and weak anisotropic magnetic interaction. Using the Bogolyubov, Tyablikov approximate second-quantization method, the Hamiltonian is reduced to…
This paper examines how measurements of negative muon capture by protons could help identify the weak non-electromagnetic interaction between muons and nucleons. Assuming polarized muons in muonic hydrogen and allowing for parity nonconservation, it derives the neutron angular distribution for the r…
This paper examines crystallization in statistical physics using Bogolyubov’s method of distribution and correlation functionals, aiming to connect the structure of a system with its thermodynamic functions. It derives an equation for the one-particle distribution function, formulates a free-energy …
This paper derives approximate relations between the electrical properties of ionic crystals and crystal lattice parameters. Using kinetic arguments for electron energy in a strong electric field and the phonon propagation velocity expressed through the quasi-elastic coupling coefficient, the author…
This paper develops approximate dispersion relations for nucleon nucleon scattering intended to avoid unobservable antinucleon nucleon amplitudes appearing in exact formulations. Starting from a standard dispersion relation, the authors neglect antinucleon contributions, include the deuteron interme…
This paper derives the bound-state energy levels of a negatively charged spin 1/2 particle, such as an electron or negative muon, in a Coulomb field using a previously formulated wave equation that includes a deviation of the magnetic moment from the corresponding magneton. The angular part is separ…
This study examines electrode phenomena and near-electrode optical changes in NaCl, KCl, KBr, and KI single crystals during high-temperature electrolysis. Crystals were heated to 450 to 600°C, subjected to constant electric fields, and characterized by current, reverse current, short-circuit potenti…
This paper analyzes the propagation of electromagnetic waves in a gravitational field by rewriting the vacuum field equations near finite masses in a form analogous to Maxwell equations for a moving anisotropic medium. Using geometrical optics and Rytov’s method, it derives a generalized eikonal equ…
This study investigates the previously unobserved germanium L-series lines L beta 3 and L beta 4, associated with transitions from the L I level to the M III and M II levels. Using a Krasnikov-type X-ray tube, a high-vacuum spectrograph with a bent mica crystal, and photographic microphotometry of h…
This paper examines the use of an electrostatic difference field for spectroscopy of charged-particle beams, with the aim of increasing dispersion while preserving focusing in compact ion-optical instruments. The authors derive first-order focusing and dispersion relations, discuss second-order aber…
This paper develops a kinetic theory for the ordered motion of small aerosol particles in a binary gas mixture with a concentration gradient, focusing on the regime in which the particle radius is much smaller than the molecular mean free paths. Using Boltzmann kinetic equations and Sonine polynomia…
This paper reports experimental measurements of the constant-volume heat capacity of water and water vapor near the critical region using an adiabatic calorimeter with thermoelectric temperature regulation. The authors examine how heat capacity changes during the transition from two-phase to single-…
This paper reports observations on the coloration of barium titanate single crystals and compares the phenomenon with color-center processes known in alkali halide and silver halide crystals. Single crystals grown by a modified Mattias method were examined optically after growth, reduction, oxidatio…
This paper reports measurements of neutron yields from radon alpha-neutron sources prepared with several target materials, including beryllium, boron, carbon, calcium fluoride, magnesium, aluminum, silicon, silica, granite, and glass. Cylindrical radon-filled ampoules containing powdered targets wer…
This paper studies the scattering problem for the Schrödinger equation in three-dimensional Euclidean space when the potential has singularities. Using the resolvent kernel of a self-adjoint extension of the operator, it establishes existence and uniqueness results under decay and local growth assum…
