1. Max Planck Institute for the Structure and Dynamics of Matter, D-22761 Hamburg, Germany
2. The Center for Free-Electron Laser Science, D-22761 Hamburg, Germany
3. The Hamburg Centre for Ultrafast Imaging at the University of Hamburg, D-22761 Hamburg, Germany
4. Departamento de Quimica Fisica
y Quimica Inorganica, Facultad
de Ciencias, Universidad de Valladolid, 47011 Valladolid, Spain
5. Institute
of Physics, Polish Academy of Sciences, 02-668 Warszawa, Poland