Recent Papers

On a New Modification of $\mathrm{Ag}_2\mathrm{O}$ with a Layered Structure

Determination of the Spectral Composition of the Gudden–Pohl Effect Flash in Zinc Sulfide-Based Phosphors

This paper examines whether the spectral composition of the Gudden-Pohl flash in zinc sulfide based phosphors differs from that of ordinary phosphorescence, as had been suggested in earlier work. Using a monochromator, photomultiplier, and ballistic galvanometer measurements on zinc sulfide phosphor…

Topological Structure of Space and the Mass Spectrum of Elementary Particles

This paper proposes a topological model relating elementary particle masses to symmetry properties of critical spatial surfaces associated with gravitational radii. It defines packing coefficients for spheres, tori, and knotted surfaces with axial screw symmetry, then inserts these coefficients into…

On the Mechanism and Kinetics of Electroluminescence in Cuprous Oxide

This paper investigates the mechanism and kinetics of infrared electroluminescence in cuprous oxide under different excitation and contact conditions, including the use of ohmic metal contacts. Experiments on samples with and without the parent copper layer show that removal of the Cu, Cu2O blocking…

Investigation of electric charges arising during deformation of polymers

This study examines electric charges produced during mechanical deformation of polar and nonpolar polymers, including polymethyl methacrylate, polyvinyl chloride, polystyrene, polypropylene, and polyethylene. Specimens prepared by pressing and heating were tested by lifting-electrode and dynamic-cap…

On Some Properties of the Discrete Spectrum of the Radial Schrödinger Equation

This paper studies the discrete spectrum of the radial Schrödinger equation with a Coulomb term and additional singular or integrable potentials. For a special rational power form of the potential, it derives an explicit representation of the coefficient function governing the asymptotics of the reg…

On Thermal Autoignition of a Homogeneous Gas Mixture in a Flow

This paper examines thermal self-ignition of a homogeneous combustible gas mixture in a laminar flow, with attention to gas-phase processes during combustion of condensed explosive systems. Using the assumptions of classical combustion theory, the authors formulate a stationary heat and reaction mod…

Paramagnetic component of the magnetic susceptibility of $\mathrm{A}^{\mathrm{III}}\mathrm{B}^{\mathrm{V}}$ semiconductor compounds according to X-ray diffraction analysis

This paper addresses the separation of paramagnetic and diamagnetic contributions to the magnetic susceptibility of sphalerite-type semiconducting AIIIBV compounds using X-ray diffraction data. The authors model the electron density of covalent sp3 bond bridges with a three-dimensional Gaussian func…

Wave Functions and Calculation of Matrix Elements for Longitudinally Polarized Vector Particles

The paper develops a covariant method for representing wave functions and calculating matrix elements for massive spin 1 vector particles, with particular attention to fixed longitudinal and transverse polarizations. Working in the 10 dimensional Duffin Kemmer beta formalism, it expresses spin proje…

EPR spectrum of the hydrated electron in irradiated frozen alkaline solutions

This study examines whether hydrated electrons can be detected by electron paramagnetic resonance in frozen alkaline aqueous solutions, where stabilization is expected to suppress conversion into atomic hydrogen. Frozen KOH and NaOH solutions in water and heavy water were irradiated at liquid nitrog…

Application of an Optical Quantum Generator for Exciting Recombination Luminescence in Semiconductors

This study investigates optical excitation of recombination luminescence in semiconductors at high nonequilibrium carrier concentrations, with relevance to semiconductor quantum generators. A pulsed ruby optical quantum generator at 6934 Å was used to excite germanium, silicon, and gallium arsenide …

X-ray Determination of the Diamagnetic Susceptibility of Some Ionic and Semiconductor Compounds

This paper addresses the separation of experimentally measured lattice magnetic susceptibility into diamagnetic and paramagnetic components for ionic and semiconductor compounds. Using X-ray-derived electron-density distributions, with corrections to zero temperature and elimination of vibrational e…

Excitation of Hypersound by Slow Electromagnetic Waves

This paper proposes and analyzes a method for exciting hypersonic waves in quartz using surface slow electromagnetic waves propagating along a periodic structure, motivated by limitations of cavity resonator piezoelectric excitation at very high frequencies. The authors formulate the elastic equatio…

On the Kinetics of Crystallization Nucleus Formation in Vitreous Selenium

This paper proposes a phenomenological kinetic description of crystallization nucleus formation and growth in glassy selenium under ionizing radiation. It argues that radiation accelerates crystallization by producing ruptures in polymer selenium molecules, creating mobile segments that can aggregat…

Suydam Instability at Finite Ion Larmor Radius

This paper examines how Suydam instability in a plasma confined by a helical magnetic field is modified when the finite ion Larmor radius is included beyond the magnetohydrodynamic approximation. Starting from the collisionless kinetic equation, the authors calculate the wave induced plasma currents…

Modified and True Formulations of Problems of a Nonideal Bose-Einstein Many-Particle System

This paper examines the relation between the “true” canonical formulation of an interacting Bose system, in which zero-momentum creation and annihilation operators are retained, and the modified formulation, in which they are replaced by the c-number square root of the condensate occupation. It argu…

An example of a magnetic field structure with collapsing magnetic surfaces

This paper examines the local structure of magnetic field lines near periodic lines in a previously studied potential magnetic field, using a mapping plane representation of field-line returns. By numerically tracing field lines launched near rational points and constructing the corresponding linear…

On the Stability of Stationary States of Quantum Generators

This paper analyzes the stability of stationary states in quantum generators with resonators of arbitrary form. It formulates gain and loss balance along ray paths, includes losses from scattering, absorption, coatings, and radiation escape, and uses a nonlinear saturation model to derive conditions…

Soft X-ray Emission from Stars

This paper estimates the expected soft X-ray radiation of bright stars at wavelengths below 100 Å, motivated by the increasing feasibility of rocket observations and by strong interstellar absorption at longer extreme-ultraviolet wavelengths. Using coronal emission measures from earlier stellar atmo…

Inclusion of superfluid effects in $\alpha$ decay to vibrational levels of daughter nuclei

This paper extends a superfluid nuclear model of alpha decay to transitions from even-even parent nuclei into collective vibrational states of deformed daughter nuclei. Using a Hamiltonian with pairing and quadrupole-quadrupole interactions, the authors apply the Bogolyubov canonical transformation …

Isochoric Heat Capacity of Water and Water Vapor in Single- and Two-Phase Regions Adjacent to the Boundary Curve, Including the Critical Point

This paper reports high-resolution adiabatic calorimetric measurements of the constant-volume heat capacity of water and water vapor near the liquid-vapor boundary curve, including the critical region. By reducing temperature and specific-volume steps and improving the calorimeter, the authors measu…

Fission of $\mathrm{Th}^{232}$ Nuclei by 14 MeV Neutrons and Continuous-Spectrum Photons with $E_{\gamma\max}=90$ MeV

This paper investigates whether mass-symmetric fission appears as a distinct component in the fission of thorium-232 induced by 14 MeV neutrons and by bremsstrahlung photons with maximum energy 90 MeV. Using a double-pulse ionization chamber with electrical collimation, the authors measured fragment…

On the Possibility of Detecting High-Frequency Radiation at Lower Frequencies

This note proposes a method for detecting high frequency radiation through transitions in quantum systems whose Zeeman degeneracy is lifted by a static magnetic field and which are simultaneously exposed to longitudinal low frequency and transverse high frequency alternating magnetic fields. The arg…

Fine structure of the decay times of edge emission bands in $\mathrm{GaP}$ crystals

This paper investigates the banded edge luminescence and afterglow of gallium phosphide crystals at 4.2 K, focusing on two narrow emission bands near 17750 and 17350 cm−1 and their phonon repetitions. Using continuous and intermittent optical excitation, the authors show that the bands are doublets,…

Phase Transitions in Antimony at High Pressure

High-pressure phase transitions in antimony were investigated by preliminary X-ray diffraction measurements at 30, 50, 90, and 100 kbar using a calibrated high-pressure chamber. The results indicate a reversible transition near 50 kbar from the initial rhombohedral structure to a primitive cubic lat…

On the Radiation of a Charge Moving in Plasma Near Cyclotron Resonance

This paper analyzes cyclotron radiation from charged particles moving in a magnetized plasma when a finite velocity component along the magnetic field produces a Doppler shift near resonance. Using cold plasma refractive indices and established radiation formulas, the authors numerically calculate t…

Rate Constants of Thermal Excitation of Sodium in Mixtures of Sodium Vapor with Argon and Nitrogen

This paper estimates rate constants for thermal excitation of sodium atoms in mixtures of sodium vapor with argon and nitrogen by using experimental data on the reverse process, quenching of sodium D fluorescence. Applying detailed balance to published quenching cross sections, it derives an excitat…

On the electrophotographic isopaque of $\mathrm{AgCl}$ single crystals

The study investigates depolarization isoopaques of the photoelectret state in AgCl single crystals at liquid nitrogen temperatures, focusing on how colloidal silver centers affect deviations from the reciprocity law. AgCl foils were successively illuminated to vary the concentration and size of col…

Investigation of the Analytic Properties of Ladder Diagrams by the Method of Complex Orbital Moments

This paper studies the analytic properties of ladder Feynman diagrams using the method of complex orbital angular momenta, with emphasis on their spectral representation in the transferred momentum variable. The author derives Legendre polynomial expansions for equal and unequal masses, applies the …

Experimental Studies of the Band Structure of Hexagonal Selenium and Tellurium Crystals

This paper investigates the band structure of hexagonal selenium and tellurium crystals, focusing on the interpretation of polarized absorption edges, reflection spectra, x-ray absorption data, and infrared hole absorption in relation to existing theoretical models. Reflection spectra were measured …

Complex Structure of Bands and Excitons in Cadmium Selenide Crystals

This paper investigates the complex valence-band and exciton structure of hexagonal cadmium selenide crystals, focusing on how crystal-field and spin-orbit interactions split the upper valence band. Using high-dispersion absorption and reflection spectroscopy over broad spectral and temperature rang…

Kinetic Equation of a Non-Ideal Fermi System

This paper derives a kinetic equation for a nonideal Fermi system with a general nonlocal pair interaction, using Bogolyubov’s generating functional method for quantum statistics and a perturbation expansion in the interaction strength. The authors introduce a two-particle correlation operator, impo…

On an Asymptotic Method in Plasma Stability Theory

The paper develops an asymptotic method for eigenvalue problems arising in the linear stability theory of an inhomogeneous rarefied plasma in a strong magnetic field, where the governing operator is integro-differential and contains a small parameter such as the Larmor radius. Using a WKB-type repre…

On the Theory of Weakly Turbulent Plasma

This paper develops a kinetic description of weakly turbulent collisionless plasma that supplements quasilinear theory by including nonlinear wave, wave interactions of second order. Starting from dynamical equations for slowly varying wave amplitudes and an expansion of the particle distribution fu…

THE HYPOTHESIS OF THE TRAJECTORY OF A QUANTUM PARTICLE

This paper examines whether a quantum particle may be assigned a continuous but nonclassical trajectory, with a first derivative interpreted as momentum and no second derivative or acceleration in the classical sense. Starting from the Wigner phase space formulation equivalent to the Schrödinger equ…

On the adsorption energy upon ionization of atoms on a metal surface

This paper develops a method for determining the adsorption energy of alkali-metal ions on single-crystal metal surfaces as a function of surface coverage. The authors model adsorbed atoms as partially ionized adions, account for image charges, dipole and quadrupole interactions in the adsorbed laye…

The generalized self-consistent field method and collective excitations in the theory of superconductivity

This paper studies collective excitations in superconductors using Bogolyubov’s generalized self-consistent field equations, extending the analysis beyond the simplest isotropic interaction. The two-particle interaction is expanded in spherical harmonics, which reduces the integral equations for exc…

Distribution of Polarized Radio Emission in the Source Cygnus A Based on Observations at Pulkovo

This paper reports Pulkovo observations of the polarized radio emission of Cygnus A at a wavelength of 3.02 cm, undertaken to examine the polarization properties of its separate components. Using a radiometer with a parametric amplifier, the authors recorded the Stokes parameters Q and U and derived…

Interaction of High-Density Plasma Clumps with Magnetic Fields

This paper reports experiments on the interaction of dense deuterium plasma bunches with strong magnetic fields, motivated by plasma injection into magnetic traps for controlled thermonuclear research. Using a Marshall-type injector, the authors studied plasma jets entering increasing longitudinal f…

THE OPTIMAL LAW OF REMAGNETIZATION OF FERROMAGNETIC CORES WITH A RECTANGULAR HYSTERESIS LOOP FROM THE STANDPOINT OF MINIMUM LOSSES

This paper examines how to minimize energy losses during the remagnetization of ferromagnetic cores with nearly rectangular hysteresis loops over a prescribed switching interval. Using dynamic core characteristics that relate the rate of change of induction to field strength, the authors formulate t…

Conformal transformation groups in gravitational fields

The paper studies conformal transformation groups in four-dimensional Riemannian spaces of gravitational-field signature, with the analysis restricted to analytic functions. Using Lie group methods, the conformal Killing equations and their integrability conditions are derived and examined for nontr…

ON THE DEGRADATION OF STELLAR AND COSMIC NEUTRINOS

This paper examines the possible long term fate and energy degradation of stellar, cosmic ray, and relic neutrinos in a universe where known absorption processes are ineffective. Using cosmological redshift arguments and estimates of matter density, expansion, and neutrino production rates, it deriv…

MAGNETIC SPACE SYMMETRY OF TENSORS

The paper generalizes a previously developed point group treatment of tensor symmetry to Shubnikov, or magnetic space, groups. It defines tensor functions on the magnetic Euclidean group, gives their transformation law including rotations, inversion, time reversal, and translations, and derives inva…

On Low-Temperature Expansions in the Theory of Ferromagnetism

This paper examines low-temperature expansions for an isotropic ferromagnetic dielectric, focusing on the elementary-excitation spectrum, spin-wave lifetime, and magnetization for a spin-one simple cubic lattice with nearest-neighbor interaction. Using Pauli operators equivalent to the original spin…

“Multiquantum Transitions” in Electron Paramagnetic Resonance

This paper examines how an additional radio-frequency magnetic field, applied parallel to the static field, modifies electron paramagnetic resonance and gives rise to features often described as multiquantum or two-quantum transitions. The authors discuss the expected sideband structure of the reson…

Theory of Low-Temperature Transport Phenomena in Semiconductors with Low Mobility

This paper develops a low-temperature theory of transport phenomena in low-mobility semiconductors with strong electron-phonon coupling, complementing earlier high-temperature small-polaron treatments. Using Kubo-type transport expressions in a localized polaron basis and transforming to band-polaro…

ON THE STABILITY OF CHAPMAN—JOUGUET DETONATION

This paper investigates the linear stability of a one-dimensional Chapman-Jouguet detonation in an ideal gas with a finite chemical reaction zone governed by a kinetic law. Small cylindrical harmonic perturbations in a circular tube are introduced, reducing the hydrodynamic and kinetic equations to …

Quantum-Statistical Theory of Ferromagnetic Resonance

This paper develops a quantum statistical derivation of ferromagnetic resonance equations for a saturated, spherical, isotropic ferromagnet with spin magnetism in constant and alternating magnetic fields. Starting from the density matrix equation with exchange and dipole interactions, the authors tr…

On the Form of Impurity Occurrence in Heavily Doped $n$-Type Germanium and Silicon Single Crystals

This paper investigates the form in which Group V donor impurities occur in heavily doped n-type single crystals of silicon and germanium. By comparing Hall-effect carrier concentrations with total impurity concentrations measured by radioactivation analysis, and by using metallographic, mass-spectr…

Separation of silicon isotopes in monosilane by thermal diffusion

This paper investigates the separation of stable silicon isotopes by thermodiffusion using monosilane as the working gas, motivated by the high cost of calutron separation and the weak isotope effect in monosilane rectification. Experiments were performed in a coaxial-cylinder metal thermodiffusion …