* Corresponding authors a Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Oxford OX1 3TA, UK b Institut für Kernphysik, Goethe-Universität, Max-von-Laue-Strasse 1, 60438 Frankfurt am Main, Germany c Stanford PULSE Institute, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025, USA E-mail: ruforbes@stanford.edu d Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, UK e QST, SPring-8, Kouto 1-1-1, Sayo, Hyogo, Japan f...