1. Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Oxford OX1 3TA, U.K.
2. Department of Applied Physics, Tokyo University of Agriculture and Technology, Tokyo 184-8588, Japan
3. Department of Physics, Kyoto University, Kyoto 606-8502, Japan
4. National Institutes for Quantum Science and Technology (QST), SPring-8, Kouto 1-1-1, Sayo, Hyogo 679-5148, Japan
5. Institute for Molecular Science, Okazaki 444-8585, Japan
6. Sokendai (The Graduate University for Advanced Studies), Okazaki 444-8585, Japan
7. School of Chemistry, University of Bristol, Bristol BS8 1TS, U.K.
8. Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
9. PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
10. School of Chemistry, University of Southampton, Southampton SO17 1BJ, U.K.
11. National Research Council of Canada, Ottawa, Ontario K1A 0R6, Canada
12. Deutsches Elektronen-Synchrotron (DESY), Hamburg 22607, Germany
13. Department of Physics and Astronomy, University of Turku, Turku FI-20014, Finland
14. Graduate School of Advanced Science and Engineering, Hiroshima University, Hiroshima 739-8526, Japan
15. RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan
16. Japan Synchrotron Radiation Research Institute, Sayo, Hyogo 679-5198, Japan
17. J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, United States
18. Department of Chemistry, Tohoku University, Sendai 980-8578, Japan