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The paper presents the results of experiments on measuring cross-sections for the neutron transfer channels 9Be(3He, α)8Begs,3.03 in the reaction of the 3He (30 MeV) ions with the 9Be target. To describe the angular distributions, we use the Distorted Wave Born Approximation (DWBA) applying the FRESCO code. The results of the theoretical analysis are in agreement with the experimental data. In addition, we perform calculations based on the solution of the time-dependent Schrödinger equation (TDSE) for the weakly bound neutron of the 9Be nucleus. The TDSE approach allows us to determine the dynamics of the neutron transfer process and calculate the probabilities for the transfer and removal of the neutron of the 9Be nucleus in the 3He + 9Be reaction. [ABSTRACT FROM AUTHOR]

In this study, we investigated the production of Au isotopes through neutron transfer reactions in the 48Ca + 197Au collision at a beam energy of 300 MeV. The reaction products of 197±xAu were captured and stopped within an assembly of Au targets after being irradiated with a 48Ca beam. The populated Au isotopes were identified through gamma decay spectroscopy and production cross-sections were determined. Furthermore, we performed model calculations based on the solution of the time-dependent Schrödinger equation for neutrons. These calculations aimed to estimate the formation probabilities and cross-sections of the measured Au isotopes and to elucidate the dynamics of the neutron transfer process. To describe the cross sections of neutron transfer channels and compare with the results of calculations within the framework of the model based on the time-dependent Schrödinger equation, calculations using the Grazing code were performed. [ABSTRACT FROM AUTHOR]

The evolution of the probability density of outer weakly bound neutrons of 11Li and 11Be nuclei in collisions with 28Si and 48Ti nuclei is described on the basis of a numerical solution to the time-dependent Schrödinger equation. Probabilities for outer neutron stripping due to the processes of neutron transfer and nuclear breakup are determined. Calculations of the cross sections for the loss of two neutrons by the 11Li nucleus in the 11Li + 28Si reaction are close to experimental data. [ABSTRACT FROM AUTHOR]

The results of an experiment carried out on the MAVR high-resolution magnetic spectrometer and devoted to studying neutron transfer in the Ta reaction at the projectile energy of 10 MeV per nucleon are presented. A theoretical analysis of the experimental cross sections is performed for the neutron transfer mechanism by means of a time-dependent approach based on solving the time-dependent Schrödinger equation. The dynamics of the neutron transfer process is described, and the probabilities for the population of unoccupied neutron levels in the O nucleus are determined. [ABSTRACT FROM AUTHOR]

The results of experiments performed at a high-resolution magnetic spectrometer (MAVR) are presented. The differential production cross sections for oxygen isotopes in the Ta reaction at the projectile energy of 10 MeV per nucleon were measured at the MAVR facility. The yield of reaction products is analyzed theoretically in the finite-range distorted-wave Born approximation (FR-DWBA method) by means of the FRESCO code. The theoretical differential cross sections are calculated for sequential neutron transfer. The contributions of the mechanisms of sequential neutron transfer and dineutron-cluster transfer to the production cross sections for the neutron-rich oxygen isotopes O are studied. [ABSTRACT FROM AUTHOR]

Herein, we investigated the influence of two types of nanoparticle fillers, i.e., amorphous SiO2 and crystalline ZrO2, on the structural properties of their nanocomposites with high-density polyethylene (HDPE). The composite films were prepared by melt-blending with a filler content that varied from 1% to 20% v/v. The composites were characterized by small- and wide-angle x-ray scattering (SAXS and WAXS), small-angle neutron scattering (SANS), Raman spectroscopy, differential scanning calorimetry (DSC), and scanning electron microscopy (SEM). For both fillers, the nanoaggregates were evenly distributed in the polymer matrix and their initial state in the powders determined their surface roughness and fractal character. In the case of the nano-ZrO2 filler, the lamellar thickness and crystallinity degree remain unchanged over a broad range of filler concentrations. SANS and SEM investigation showed poor interfacial adhesion and the presence of voids in the interfacial region. Temperature-programmed SANS investigations showed that at elevated temperatures, these voids become filled due to the flipping motions of polymer chains. The effect was accompanied by a partial aggregation of the filler. For nano-SiO2 filler, the lamellar thickness and the degree of crystallinity increased with increasing the filler loading. SAXS measurements show that the ordering of the lamellae is disrupted even at a filler content of only a few percent. SEM images confirmed good interfacial adhesion and integrity of the SiO2/HDPE composite. This markedly different impact of both fillers on the composite structure is discussed in terms of nanoparticle surface properties and their affinity to the HDPE matrix. [ABSTRACT FROM AUTHOR]