Sakhelashvili, GDorn, Alexander RHohr, CUllrich, JoachimKheifets, AnatoliLower, JulianBartschat, Klaus R2015-12-132015-12-130031-9007http://hdl.handle.net/1885/82641Simultaneous ionization and excitation of helium atoms by 500 eV electron impact is observed by a triple coincidence of an ionized slow electron, the recoiling He+ ion, and the radiated vacuum ultraviolet photon (λ≤30.4nm). Kinematically complete diffeKeywords: Electron impact; Large momentum transfers; Electrons; Ionization; Numerical methods; Photons; Vacuum; HeliumTriple Coincidence (e, γ2e) Experiment for Simultaneous Electron Impact Ionization Excitation of Helium200510.1103/PhysRevLett.95.0332012015-12-11