Abstract
The transmission of highly collimated multicharged ions through alumina nanocapillary arrays was studied using 200 MeV and 10- to 20-keV/q ion beams. The aligned nanopores each have a diameter and length of 100 nm and 60 μ, respectively. Emergent charge-state-selected angular distributions were measured at low energy. The distributions consist of sharp two-dimensional peaks that sit on a continuum distribution. Analysis of the results from target tilting experiments indicate that the observed structure can be explained simply by multiple collisions of the projectile with nanopore walls. We discuss these results and other effects produced by applying a fine wire mesh and Au thin films to the nanocapillary array.
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