Emergence of topological defects in a bilayer of multiwalled carbon nanotubes irradiated by gamma-rays

We have studied gamma-ray scattering on rolled graphene atomic layers of high-ordered multiwalled-carbon-nanotubes which organized a bilayer. Radiation high-energy topological defects of a type of pair "vortex-antivortex" in electron and hole densities have been revealed. We suppose that the fluxes of the vortex-antivortex pairs are produced by gamma-quanta in the graphene plane.