Маkarets M. Interaction of medial energy ions with solids and nanostructures

Theory of swift ions interaction with solids and nanostructures was advanced: contributions into nuclear collisions integral in LSS-equations, stipulated by the ions trajectories curvilinearity and fluctuations of their energy losss, were outlined; a summarise cross section of elastic scattering was proposed; characteristic functions were applied for solving of the equations, study and construction distributions of total and spatial runges; method of slowly varying functions was offered for calculation of their cumulants. Cumulants up to 6-th order for these distributions at ion energies up to 1 GeV and for all ion-monoatomic target pairs were found. Density of distributions, which taken into account these cumulants, were constructed. Influence of the surface sputtering, its temperature, diffusion, and radiation-enhanced diffusion on the above distributions of implanted ions and created radiation defects and on the cumulants was studied. Methods of numerical simulation of interaction of swift ions andelectrons with carbon nanostructures were advanced and it was shown lowenergy secondary electrons give the main contribution in polymerization of the C60-fullerite by electrons beam with an energy about keV. The average number of created polymeric bonds per one primary electron was found; and using of the C60-fullerite as a material of lowenergy beta-radiation detectors was proposed. It was shown that the secondary electrons contribution in nanotubes crosslinking is also essential under their irradiation by carbon ions with an energy of several keV, when the ions and generated recoils, apart from crosslinking, also are amorphizing of the system.