Morhenn, H. [P:(DE-HGF)0] ; Busch, S. [P:(DE-HGF)0] ; Meyer, H. [P:(DE-HGF)0] ; Richter, Dieter [P:(DE-Juel1)130917] ; Petry, W. [P:(DE-HGF)0] ; Unruh, T. [P:(DE-HGF)0]