![](/sites/default/files/hm/images/2014-07-01_XFEL_Installation_XM-2_DN-MK3-7497.jpg)
Researchers using the European XFEL have been able to follow the path of an electron across an atom using ultra-short X-ray pulses.
http://www.xfel.eu/news/2015/team_uses_x_ray_laser_to_watch_electrons_travel_across_molecule/
Researchers using the European XFEL have been able to follow the path of an electron across an atom using ultra-short X-ray pulses.