Mattauch, S. [P:(DE-Juel1)130821] ; Rücker, U. [P:(DE-Juel1)VDB1360] ; Korolkov, D. [P:(DE-Juel1)VDB58597] ; Babcock, E. [P:(DE-Juel1)VDB80920] ; Ioffe, A. [P:(DE-Juel1)130729] ; Brückel, T. [P:(DE-Juel1)130572]