Carstanjen, Heinz-DieterEmrick, Roy M.Kupke, ThomasPlachke, DieterWittmann, RolfTrebin, Hans-Rainer2015-12-172016-03-312015-12-172016-03-311992http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-104199http://elib.uni-stuttgart.de/handle/11682/5202http://dx.doi.org/10.18419/opus-5185The channeling properties of a T-phase A1 62Cu 20Co 15Si 3 quasicrystal are investigated in a Rutherford backscattering study employing 2 MeV He-ions. Besides axial channeling along the decagonal axis, also planar channeling is observed in planes having the decagonal axis in common and showing the decagonal symmetry of the quasicrystal. Besides a system of main planes, various planes exhibiting only weak channeling properties are observed; they correspond to linear arrangements of vertices in a two-dimensional Penrose grid, demonstrating the close relationship between T-phase quasicrystal and Penrose pattern. Rutherford backscattering (RBS) has also been used to study the decoration of the T-phase structure by Co/Cu- and Al/Si-atoms; in addition, particle induced X-ray emission PIXE served to distinguish between Co- and Cu-atoms. The experimental data are compared with channeling computer simulations on a model T-phase quasicrystal proposed by Steurer and Kuo.eninfo:eu-repo/semantics/openAccessPIXE , Quasikristall , Rückstreuung530article