1. Institute of Physics, ELI Beamlines, Academy of Sciences of the Czech Republic, Na Slovance 2, CZ-18221 Prague, Czech Republic
2. Max Planck Institute for the Structure and Dynamics of Matter, CFEL (Bld. 99), Luruper Chaussee 149, 22761 Hamburg, Germany
3. Dipartimento di Chimica Industriale, Università degli Studi di Bologna, Viale del Risorgimento 4, I-40136 Bologna, Italy
4. Instituto de Ciencia Molecular, Universitat de València, Apartado 22085, ES-46071 Valencia, Spain
5. Departments of Chemistry and Physics, University of Toronto, Toronto, Ontario M5S 3H6, Canada
6. Department of Chemistry, University of California, Irvine, California 92697-2025, United States