Abstract For the first time, pharmaceutical tablet coating thickness is measured by combined Raman spectrometry (RS) and laser induced breakdown spectrometry (LIBS) techniques. Measurements by two methods (RS and LIBS) are performed during a single pump lamp flash of a pulsed Nd:YAG laser in the double pulse lasing mode. This approach combining a probe laser pulse (RS) followed by an ablating laser

Abstract Viscoelastic nanocomposites based on a matrix of semidilute aqueous solutions of entangled wormlike (polymer-like) micelles of a cationic surfactant and aluminosilicate nanoplates of montmorillonite clay, efficiently acting as crosslinks, were prepared and studied. The produced materials represent a new type of a self-assembling nanocomposite system. The results of changes in viscoelastic

Abstract—Quantum-mechanical ab initio calculations are applied to study the growth mechanism of polycyclic aromatic hydrocarbons via reactions of 1- and 2‑naphthyl with propyne (methylacetylene) and allene (1,2‑propadiene). It was shown that stabilized isomers С13Н11 are mostly formed at temperatures <1000 K. At temperatures above 1000 K, the yield of bimolecular three-ring products C13H10 + H and

Abstract The geoeffectiveness of single and complex transient structures of the solar wind (SW), formed by coronal mass ejections (CMEs) and associated Forbush decreases (FDs) in the cosmic ray flux is considered. By the example of the period of 2010–2011, it is shown that complex SW structures resulting from the interaction of CMEs with high-speed streams from coronal holes or with other CMEs in the

Abstract The scheme and components of a wide field-of-view meter-wavelength radio telescope prototype developed based on an antenna array consisting of 128 dipoles is described. The operating frequency range is 38–74 MHz. Main parameters of the future prototype are presented and versions of its development are discussed.

Abstract Molecular mechanisms of the participation of proteins in reactive oxygen species (ROS) generation resulting from the singlet-oxygen effect upon laser exposure in solutions of various proteins are considered. The kinetic equations describing ROS generation are derived, and their approximate general solution is found in the analytical form. By comparison of the found kinetic dependences with

Abstract—Laser-induced plasma channels (LIPC) formed during the interaction of ultrashort laser pulses with argon are studied. LIPC characteristics are studied at various pressures.

Abstract A method for calculating the critical state of inhomogeneous superconducting films using the Ginzburg–Landau (GL) theory is proposed. From the condition of minimizing the functional of the GL free energy, a system of equations describing the superconducting state of an inhomogeneous plate is derived. The dependences of the critical current of the plate on the external magnetic field are numerically

Abstract—Structural features of current sheets formed in laboratory experiments in plasma with ions of different mass are compared based on dimensionless parameters and compared with the values of Hall currents.

Abstract—The self-similarity effect during rarefied water vapor flow between two finite-volume vessels is repeatedly recorded with a similarity coefficient of 3/4. The concept of hybrid water molecules is defined and a theoretical model describing the behavior of such molecules when sampling a water vapor is constructed. The model describes translational motion of water molecules near the gas–condensed

Abstract—The flux density vector of the electromagnetic energy in the Poynting form and the problem of the electron electromagnetic momentum, associated with this definition, are considered. The alternative flux density definition, i.e., the Umov vector whose value is identical to the Poynting vector only for empty space, is also analyzed. For qualitative comparison of differential and integral values

Abstract—Within the kinetic theory of extensive air shower (EAS), an approach to calculating electron charge excess radio emission is formulated. Using the Tamm formula, emission of each electron of the shower disk is calculated taking into account its spatial distribution, temporal evolution along the EAS track, electron energy spectrum, and multiple scattering. Radiation from all EAS tracks is summed

Abstract Ce3+, P5+, Ca2+, and Zn2+ ion doped Gd2SiO5 crystals are grown by the Czochralski method. The pulsed cathodoluminescence spectra, light yield, and scintillation time under gamma excitation are studied. It is first shown that additional doping with P5+ phosphorus ions decreases crystal cracking in the fabrication of scintillation elements, and increases the scintillation light yield in comparison

Abstract It is urgent to use a “warm liquid” TMS in large massive calorimeters (with a volume of several hundred liters). This direction in modern nuclear physics is referred to as “non-accelerator” experiments with low-background detectors. Such experiments are associated with the solution of most important problems to understand the Universe structure and search for new particles. These are the well-known

Abstract The consideration of equilibrium radiation in plasma-like media shows that the spectral energy distribution of such radiation differs from that of Planck equilibrium radiation. Based on the previously derived relation for the spectral energy density of equilibrium radiation in the system of charged particles, accounting for finite damping in a medium with spatial dispersion, the limiting case

Abstract The shape of soft X-ray spectra and energy confinement dynamics is studied in experiments on central ECR heating with a power to 1 MW using the L-2M stellarator. It is shown that the spectra remain two-temperature with increasing heating power. In this case, the average electron energy in the epithermal spectral region increases reaching 25% of the average energy over the entire spectrum at

Abstract Linear equations describing the dynamics of small perturbations in partially ionized heat-releasing plasma in an external magnetic field with an arbitrary induction vector are obtained. Using these equations, a dispersion relation for condensation modes is derived, and their time increments are calculated in the case of isobaric instability in the presence of anisotropy of the plasma thermal

Abstract The external metric in the Schwarzschild problem is considered using the source theory in the G2-approximation within general relativity and phenomenologically a three-graviton vertex following from the field theory. It is shown that in the mass defect terms \({{g}_{{00}}}\) is identical in both approaches and is consistent with the Newtonian one. In the spatial region, it is probably different

Abstract Reflectance spectra of thin Pb1 –xSnxTe films (~60 nm) with x = 0.25, 0.53, and 0.59, grown by MBE on hybrid GaAs/CdTe substrates, are measured in the frequency range of 20–5500 cm–1 and the temperature range of 5–300 K. The temperature dependence of transverse optical phonon frequencies and structural phase transition temperatures are determined based on a dispersion analysis. An increase

The results of the search for tracks of heavy and superheavy nuclei of galactic cosmic rays in the charge range Z = 26 − 129, identified in olivine crystals from Maryalahti and Eagle Station meteorites are presented. The database including characteristics of 21743 tracks, obtained in the OLIMPIA experiment, is currently the largest one within the charge range under study. It includes three tracks of

Non-stationary photovoltage excitation in silicon carbide and gallium oxide crystals is studied. The signal transient responses are measured, and the photoelectric parameters necessary for developing adaptive photodetectors, i.e., the specific photoconductivity, Maxwell relaxation time, and diffusion length of carrier transport, are determined. The sensitivity of the photodetector based on gallium

This study is devoted to the development of efficient luminescent hybrid materials excited by UV radiation and featuring narrow luminescence lines as well as light, humidity, and temperature resistance. As a luminescent material, a terbium ion coordination compound introduced into the matrix of an organofluorine polymer is used. It has been shown that efficient excitation transfer to electronic levels

Soft X-ray spectra coming from the ECR heating region, non-distorted by the effect of the plasma-wall interaction, are measured at the L-2M stellarator in experiments on axial and off-axial ECR heating. In both cases, the measured soft X-ray spectra turned out to be non-Maxwellian. It was found that the electrons forming the suprathermal spectral region are produced in the heating region, but do not

Pulsar J0810+37 with a period of 1.2483 s is detected at a frequency of 111 MHz during the pulsar search at the Big Scanning Antenna (BSA) radio telescope of the Lebedev Physical Institute [1]. In this paper, we present the results of the detailed study of radio emission from J0810+37 which exhibits a rare nulling effect of different durations in a very wide time interval with an average nulling fraction

Spectra of light extinction by metal nanoprisms and nanostars coated with molecular aggregates of organic dyes are calculated and theoretically analyzed. Qualitatively different nature of the spectra of organometallic nanoparticles under study is established when using J-aggregates of various cyanine dyes as their capping layer, as well as silver and gold as the cores. This results from the implementation

Using the modified discrete sources method, the problem of calculating plasmon spectra of the characteristic energy loss of electrons during the interaction with silver nanoparticles from 2 to 8 nm in size is solved. The calculated spectra are compared with the experimental data confirming the significant spatial dispersion effect. The importance of the consideration of this factor when analyzing the