Surzhykov, A. [P:(DE-Ds200)BUDP1-0314] ; Maiorova, A V [P:(DE-HGF)0] ; Shabaev, V M [P:(DE-HGF)0] ; Stöhlker, Thomas [P:(DE-Ds200)OR1264] ; Fritzsche, Stephan [P:(DE-Ds200)OR2243]