Abstract A way of exciting nuclei using reverse conversion is studied. Nuclear excitation occurs due to resonance absorption of the kinetic energy of the recombining electron and its binding energy in the final state. Calculations of triggering cross sections are made using reverse conversion of the energy of ions of isomeric nucleus 129mSb on a bare nucleus and lithium-like ions. Experiments to study

Abstract The properties of the ground state of even–even nuclei in a wide range of mass numbers are studied in an approximation of a self-consistent relativistic and nonrelativistic mean field of nuclei. Special attention is given to nuclei beyond the theoretically known neutron drip line, which form a peninsula of nuclei stable with respect to the emission of one or two neutrons in (N, Z) space at

Abstract Current experimental and computational studies of the Yalina subcritical setup are reviewed. The main characteristics of the Yalina Thermal facility and its neutron physics parameters are given. Computer modeling of the experimental setup is done using the Monte Carlo MCU-PD and MCNP codes for neutron physics and the updated ENDF/b-VIII, JENDL 4.0, and JEFF 3.3 nuclear data libraries. Rates

Abstract A way of obtaining physical numerical values in tabular mode from raster images of curves is described. The software module for graphic data digitizing is included in the EXFOR-Editor software package developed at the Center of Nuclear Physics Data, All-Russian Research Institute of Experimental Physics. The capabilities of the EXFOR-Editor software for processing numerical tabular data and

Abstract Results are presented from calculating the activities of fission products and actinides for the mean fuel burnup of the Belarusian Nuclear Power Plant (Belarusian NPP) (55.6 MW d t–1 U). Rates of the loss of total activity are obtained for the spent nuclear fuel (referred to below as SNF) depending on the period of storage. Calculation studies of the radiotoxicity characteristics of spent

Abstract Multineutron coupled systems (quasi-nuclei) have yet to be found, despite numerous targeted searches. However, a number of theoretical studies show that the existence of multineutron systems is possible. A new direct approach to detecting multineutron systems is proposed using kinematic features of elastic scattering. The critical angles of multineutrons with respect to the closest lightest

Abstract Nuclear modification factor RAA of π0 mesons produced in 3HeAu collisions at a cms energy of \(\sqrt {{{s}_{{NN}}}} \) = 200 GeV is extracted from data of the PHENIX experiment at the RHIC. The mean RAA value for π0 mesons with pT > 8 GeV/c is found to be close to 0.8 for central 3He + Au collisions.

Abstract Results are presented from an experiment on the inelastic scattering of 11Li with an energy of 66 MeV off protons using the coupled-channel approach with a three-particle model of cluster excitation and the FRESCO code. The model of dipole excitation describes the experiment well. The proposed approach allows determination of the isotope’s excited level, the size of its dineutron periphery

Abstract The excitation spectra of the 10В nucleus in the lithium reactions of triton and α-particle cluster transfer were calculated via summation of the corresponding spectroscopic S-factors within the multiparticle shell model. It is shown that the difference between the excitation spectra of the 10В nucleus in the lithium reactions of α-cluster transfer on 6Li nucleus and in the reaction of 6Li(α

Abstract Strongly intensive quantities for multiplicity and total transverse momentum are calculated using the multipomeron exchange approach for pp collisions in the range of SPS to LHC energies. The model allows for the interaction between quark–gluon strings, the role of which grows along with the energy of collisions. This approach is generalized to the case of pPb collisions.

Abstract Excitation spectra of the 11В nucleus in the lithium reaction of deuteron and α-particle cluster transfer are calculated by summing corresponding spectroscopic S-factors in the multiparticle shell model. It is shown that the difference between the excitation spectra of the 11В nucleus in lithium reactions of α-cluster transfer on the 7Li nucleus and the reaction of 7Li(α, γ)11B radiative capture

Abstract The operating principle of two automated systems for real-time registration of the fluence of neutrons with energies higher than 0.1 MeV is considered. The first system is based on recording the neutron flux density using fission chambers with threshold radiators. The second is based on using silicon transistors as detectors and allowing for the dependence of their current amplification factor

Abstract Nuclear modification factors of φ mesons produced in Cu + Au and U + U collisions at cms energies of \(\sqrt {{{s}_{{NN}}}} \) = 200 and 192 GeV, respectively, are studied using data from the PHENIX experiment. The nuclear modification factors of φ mesons produced in U + U and Cu + Au collisions are compared to results obtained in Au + Au and Cu + Cu systems, and to those of the π0, η, KS

Abstract Analogs of Dirac matrices are constructed from the creation and annihilation operators of spinors. They generate a chiral-symmetric version of electroweak fields and other fields. It is shown that the operator considered in the theory of second quantization to be the one of electric charge is a part of the hypercharge operator of the Pati–Salam theory.

Abstract Results are presented from measuring nuclear modification factors RAA of the π0, η, KS, and ω mesons produced in systems of Cu + Au and U + U collisions at cms energies of \(\sqrt {{{s}_{{NN}}}} \) = 200 and 192 GeV, respectively, in the PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC). The RAA values are found not to depend on the type of neutral meson and to vary in the ~0

Abstract The history and current status of investigations of the unique two-step (n, γf) reaction observed in heavy nuclei under the influence of neutrons are discussed using the example of measurements made on the neutron time-of-flight spectrometer GNEIS in Gatchina. It is shown what is already known and what kind of information can be derived from experiments to study the (n, γf) reaction on resonance

Abstract Results are presented from calculating the neutron radiation of spent nuclear fuel (SNF) from stationary campaigns of VVER-1000 and VVER-1200 reactors due to spontaneous fission and (α, n) reactions. An analytical dependence is obtained for the average number of neutrons produced in spent nuclear fuel per α-particle on the particle’s energy. The neutron radiation of VVER-1200 spent nuclear

Abstract Results are presented from an analysis of experimental data on the 3He(3He,2p)4He reaction, obtained with regard to electron screening. Data on the reaction proceeding in the gas environment are analyzed. The algorithm describing the experimental data in the low energy range presented earlier by the authors has been improved. The electron screening potential of 356 eV is obtained. Using the

Abstract A description is considered of the masses of odd deformed atomic nuclei using fourth order polynomials for an odd nucleus’s deviations of N and Z. It is shown that moving from the second to the fourth order does not bring the parameters obtained for different groups of even–even nuclei closer to one another, and the higher order parameters calculated in this manner do not match satisfactorily

Abstract A description is considered of the mass surfaces and pairing energies of a number of even–even and odd deformed nuclei with mass numbers in the range of 150 to 190 using polynomials no higher than the second order. An approach in which pairing energy depends on the mass of one odd nucleus is applied. It is shown that the main features of the behavior of pairing energies are preserved in this

Abstract A modified three-dimensional Ising model that considers the contribution from the depolarization field is used to study polarization switching in thin ferroelectric films. The effect the film thickness and the depolarization field have on the strength of the coercive field and the shape of dielectric hysteresis curve is studied.

Abstract Multilayer films (In2O3/SnO2)69 are obtained via ion-beam sputtering. The effect vacuum heat treatment in the range of room temperature to 600°C has on the structure and electrical properties is studied. It is found that the structures obtained with different thicknesses of the In2O3/SnO2 bilayer are stable up to a heat treatment temperature of 400°С. Raising the temperature to 600°C alters

Abstract A way of forming and depositing dosed droplets on the surface of a solid substrate with or without variable composition is proposed. Contact melting closely related to phase diagram is used to obtain such substrates and droplets of different concentrations. This relationship allows studies of the concentration and temperature dependences of surface characteristics under identical conditions

Abstract Results are presented from investigating the electronic structure and optical properties of DyCuGe and HoCuGe compounds. Spin-polarized calculations of the band structure are made using the local spin density approximation that allows for strong electronic correlations in the 4f-shells of rare earth ions. The optical properties of these alloys are studied in a broad range of wavelengths via

Abstract In situ Raman spectroscopy in a diamond anvil cell (DAC) is used to study ОН-perovskite MgSi(OH)6 under compression in water and carbonate fluids at high Р–Т parameters (up to 14 GPa, 420°С). The ОН-perovskite ↔ 10 Å phase + хН2О transition is either partially reversible or irreversible when there is a deficit of water in the system. When ОН-perovskite is compressed in carbonate fluid, the

Abstract The synthesis and crystal properties of mixed nitrilo-tris-methylenephosphonic complexes [CuxNi(1−x){N(CH2PO3)3}]Na4 · nH2O (x = 0–1) are studied. The interaction between the obtained complexes and surfaces of steel 20 is studied via XPS. The effect of adsorbed complex layers have on the corrosion and electrochemical behavior of the steel surfaces in an aqueous medium is studied by potentiodynamically

Abstract Interdependences are established between the parameters of the traditional description of relaxation polarization in a substance using the Debye equation and the parameters of impedance means of description. Using a model of a double-layer capacitor with leakage, patterns are found that describe the transition to strong relaxation, the disappearance of maxima in the frequency dependences of

Abstract X-ray diffraction and Mössbauer spectroscopy are used to study solid-phase reactions that occur in Fe–Cr nanocrystalline alloys during heat treatment. Upon the isochronous annealing of mechanically alloyed Fe–Cr powders, the nanostructural state is retained for all samples up to a temperature of 700°C. Fe(80)Cr(20) alloy tends to separate throughout the range of annealing temperatures. The

Abstract An experimental study is performed of the frequency dependences of complex elastic moduli of ceramic matrix piezocomposites with strong elastic dispersion and losses. The experimental data are compared to theoretical results obtained using general Kramers–Kronig relations.

Abstract Results are presented from studying the magnetic resonance properties of metal–dielectric (CoFeB + SiO2) and metal–carbon (CoFeB + C) composite films. The effect the concentrations of the magnetic metal, dielectric, and carbon phases of the composite films on the characteristics of ferromagnetic resonance is analyzed.

Abstract A study is made of the radio-shielding and radio-absorbing properties of three-phase ECOM-P/graphite/paraffin composites in the ultrashort range of wavelengths. The effect the concentration of components of the radioabsorbing filler of a composite has on its dielectric permittivity, losses, and electrical conductivity is determined.

Abstract Changes in the magnetic hysteresis properties of the (Fe0.8Cr0.1Ni0.1)75C25 alloy during the formation of the phase composition at different stages of mechanosynthesis and subsequent annealing are studied by means of X-ray diffraction and Mössbauer spectroscopy.

Abstract A new way of determining the dielectric and electromechanical characteristics of piezoelectric materials with high elastic losses is proposed. The complex electrophysical parameters of a ceramic matrix piezocomposite (a PZT-type porous ferro-piezoceramic with randomly distributed pores) are measured. The frequency dependences of the complex parameters are measured via piezoresonance spectra

Abstract The results are presented from a numerical study of the joint effect of random quantum short circuits in a disordered layer of an insulator and nonzero temperatures \(0 \leqslant T < {{T}_{{\text{c}}}}\) on the distribution of the magnetic field strength along the stationary Josephson vortex in a dirty superconductor–insulator–superconductor junction with nonmagnetic impurities in the insulator

Abstract Analytical electron (SEM-EDX) and confocal laser scanning microscopy (CLSM), microhardness testing, determining the contact angle of wetting, and other means are used to study the mechanism behind changes in the structural state of surfaces, and the mechanical, physicochemical, and technological properties of semiconductor ore minerals (sulfides) and natural quartz under conditions of a pulsed

Abstract The anodic dissolution of aluminum is studied. A mechanism for the process is proposed and confirmed experimentally. As evidence for this mechanism, it is established that the Nernst–Peters equation can be used to calculate the equilibrium potential of the anodic oxidation of water, which allows determination of the real temperature in the reaction zone.

Abstract The results are presented from studying the effect isopropanol molecules have on the pyroelectric properties of a triglycine sulfate crystal. The emergence of internal bias fields that stabilize the pyroelectric properties after thermal and field effects is revealed.

Abstract A study is made of the dielectric relaxation observed in the ferroelastic phase of submicron SrTiO3. It is shown that the relaxation process is due to interaction between electric charges and the ferroelastic domains. The presence of electromechanical coupling is confirmed by the results from studying the nonlinear dielectric response in a wide range of temperatures that includes the ferroelastic

Abstract Results are presented from experimental studies of the change in the polarization of polydimethylsiloxane upon adding 0.5% methyl and vinyl groups (grade СKТВ-1 synthetic rubber) according to currents of polarization measured upon crystallization in an inhomogeneous temperature field. A ratio that includes the polarization of flexible polymers and parameters of crystallization in an inhomogeneous

Abstract Surface segregation in Ni–Cu binary nanowire is studied using an integrated approach that combines atomistic (molecular dynamics) and thermodynamic simulation. It is shown that a tendency toward the spontaneous surface segregation of Cu atoms is a factor that stabilizes bimetallic structure Ni (core)/Cu (shell) and destabilizes structure Cu (core)/Ni (shell).

Abstract Double beta decay (β+EC, EC/EC) of 74Se was investigated at the Modane underground laboratory (LSM, France; 4800 m of water equivalent) using the OBELIX ultralow-background HPGe detector with a sensitive volume of 600 cm3 and a sample of natural selenium with a mass of 1.6 kg containing ~0.89% (~14.24 g) of 74Se. The new experimental limits for β+EC and EC/EC decays of 74Se to ground 0+ and

Abstract An experimental search is conducted for the formation of the heavy 9He isotope of helium upon the absorption of stopped pions by 14C nuclei. The structure of 9He levels in the missing mass spectra in reactions 14C(π–, p4He)Х and 14C(π–, d3He)Х is studied. A state with a high energy of excitation of 12.5 MeV and a state width of 1.5 MeV is detected for the first time. Suppression of the formation

Abstract The spin dependence of p-wave neutron scattering by spherical nuclei in region A ≈ 60–130 is analyzed. The spin-orbit splitting of the 3p-maximum of the neutron force function is described using a two-phonon approximation of the coupled channel thechnique. The cross section of inelastic neutron scattering through a composite nucleus is comparable to that of the direct excitation of collective

Abstract To measure the total neutron cross sections, the authors developed a convenient technique using silicon semiconductor detectors with the simple and compact detecting system. The created technique was used to measure A + n total cross sections at the energy En = 14.1 MeV for several nuclei in different mass region. The neutron generator NG-150 in D + T regime of neutrons generation is used

Abstract Calculations are presented for cross section σ(Eν) of solar neutrino capture by 71Ga nuclei. The calculations are based on experimental data on force function S(E) obtained in charge-exchange reactions 71Ga(p, n)71Ge and 71Ga(3He, t)71Ge. Charge-exchange force function S(E) for 71Ga is calculated using the self-consistent theory of finite Fermi systems. The effect the resonance structure of

Abstract Calculations are made for the angular distributions of changes in the energy of an electromagnetic field in the optical range formed by the interaction between high-energy electrons and a gas medium. The calculated values ​​of the angular distributions are consistent with ones observed experimentally.

Abstract Distributions of thermal neutron flux density are measured with respect to the center of a W–Be photoneutron source and the axis of an output neutron channel. The measurements are made using activation detectors. The distributions are approximated by simple functions with parameters that depend on the detectors’ coordinates. The spatial distribution is obtained for thermal neutrons in the

Abstract Invariant cross sections of carbon fragments are investigated for p(3.6 GeV) + Au collisions in terms of longitudinal versus transversal velocity components. It is found that fragments are emitted by one slowly moving source.

Abstract The registration of inelastically scattered particles (α or d) in coincidence with particles emitted during the decay of these states is proposed to determine the cluster structure of excited states of the 9Be nucleus. 9Be(α, α'x) and 9Be(d, d 'x) reactions are simulated kinematically. It is shown that analyzing the energy spectrum of a decay particle (e.g., x = n, α) allows the contribution

Abstract The possibility of generating high power terahertz radiation in a nonlinear crystal of zinc germanium phosphide (ZnGeP2) with pumping in a short-wavelength absorption shoulder of 0.67–2.5 μm is studied in detail. High power femtosecond Ti:Sapphire laser system operating at wavelengths of 800 and 950 nm are considered as a pump source. A peak terahertz radiation power of ~1 kW is obtained.

Abstract Our calculation and measurement have been made for a system consisted the Pu-Be source, the gaseous detector and moderators. As result we have got a satisfactory agreement between calculation and experiment data and have approved using the PhiTs system for this purpose. Our experimental setup does not let us make a conclusion about the source spectrum. A dependency of the particle number absorbed

Abstract A new n-body dynamic transport approach, PHQMD (Parton-Hadron-Quantum-Molecular-Dynamics), is used to describe heavy-ion collisions and the formation of clusters and hypernuclei. The first results are presented from using PHQMD to study the rates of production of strange hadrons, nuclear clusters, and hypernuclei in elementary and heavy-ion collisions at NICA energies. The sensitivity of bulk

Abstract The mass angle distribution shows a strong correlation between mass and angle when quasifission events are dominant. Therefore, as long as quasifission events are dominant, the mass angle distribution is characterized in that diagonal correlation appears. This diagonal correlation could not be reproduced in our previous model that is before introducing \({{f}_{{{\text{ina}}}}}\) and \(\gamma

Abstrac t—The mass–energy distributions of fission fragments of excited 180,190Hg nuclei formed in 36Ar + 144,154Sm reactions are measured at incident 36Ar energies of 158, 181, and 222 MeV using the double-arm time-of-flight spectrometer CORSET. The asymmetric fission of 180,190Hg with the most probable masses of light and heavy fragments of 79 and 101 amu, and 84 and 106 amu, respectively, is observed

Abstract Neutrino scattering on nuclei embedded in the hot and dense matter typical of the core collapse of supernovae, neutron star mergers, and proto-neutron stars, is studied. At finite temperatures, neutrinos experience exo- and endo-energy scattering on nuclei due to the Gamow–Teller component of a neutral current. It is shown that the average transfer of energy due to neutrino–nucleus scattering

Abstract Graphical dependencies are presented of the probability of electron neutrino preservation in a model with three active and three sterile neutrinos as a function of the neutrino distance from the source at energies, which neutrinos acquire in processes with the participation of 51Cr, 37Ar, and 65Zn nuclei. Refined values of the cross section of the reaction for neutrino capture by 71Ga nuclei

Abstract A numerical solving of the time-dependent Schrödinger equation is used to investigate the dynamics of breakup reactions and nucleon transfer at energies above the Coulomb barrier. The evolution of the wave functions of an outer weakly bound neutron of 8Li nucleus and a proton of 8B nucleus in collision with a 28Si nucleus is studied. The cross sections of outer nucleon stripping due to transfer

Abstract Properties of the radioactive decay of No, Rf isotopes are studied in the reaction 50Ti + 209Bi → 259Db* . The cross sections of Db and Rf isotopes production in channels xn and pxn, respectively, are measured. High intensity beams of accelerated heavy ions 22Ne, 48Ca, 50Ti, and 54Cr of the U400 cyclotron and SHELS kinematic separator are used in the experiments.

Abstract The mass-energy distributions of fragments formed in reactions 16,18O + 232Th, 238U, and 22Ne + 232Th, 238U at energies near the Coulomb barrier are measured to study the role of multimodal fission in the reactions of light ions with strongly deformed actinide nuclei. It is found that at these energies, multimodal fission affects significantly the mass–energy and angular distributions of fragments

Abstract The unified fission model with a Modified-Woods–Saxon (MWS) nuclear potential is used to study the proton decay of spherical proton emitters from the ground and isomeric states in the framework of WKB approximation. The results of our calculations are compared to those obtained by other theoretical models as well as experimental data. It is shown that the unified fission model with the MWS