Roeckl, E. [P:(DE-HGF)0] ; Dittner, P.F. [P:(DE-HGF)0] ; Klapisch, R. [P:(DE-HGF)0] ; Thibault, C. [P:(DE-HGF)0] ; Rigaud, C. [P:(DE-HGF)0] ; Prieels, R. [P:(DE-HGF)0]