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@ARTICLE{Rudek:151177,
      author       = {Rudek, Benedikt and Son, Sang-Kil and Foucar, Lutz and Epp,
                      Sascha W. and Erk, Benjamin and Hartmann, Robert and Adolph,
                      Marcus and Andritschke, Robert and Aquila, Andrew and
                      Berrah, Nora and Bostedt, Christoph and Bozek, John and
                      Coppola, Nicola and Filsinger, Frank and Gorke, Hubert and
                      Gorkhover, Tais and Graafsma, Heinz and Gumprecht, Lars and
                      Hartmann, Andreas and Hauser, Günter and Herrmann, Sven and
                      Hirsemann, Helmut and Holl, Peter and Hömke, André and
                      Journel, Loic and Kaiser, Christian and Kimmel, Nils and
                      Krasniqi, Faton and Kühnel, Kai-Uwe and Matysek, Michael
                      and Messerschmidt, Marc and Miesner, Danilo and Möller,
                      Thomas and Moshammer, Robert and Nagaya, Kiyonobu and
                      Nilsson, Björn and Potdevin, Guillaume and Pietschner,
                      Daniel and Reich, Christian and Rupp, Daniela and Schaller,
                      Gerhard and Schlichting, Ilme and Schmidt, Carlo and
                      Schopper, Florian and Schorb, Sebastian and Schröter,
                      Claus-Dieter and Schulz, Joachim and Simon, Marc and Soltau,
                      Heike and Strüder, Lothar and Ueda, Kiyoshi and
                      Weidenspointner, Georg and Santra, Robin and Ullrich,
                      Joachim and Rudenko, Artem and Rolles, Daniel},
      title        = {{U}ltra-efficient ionization of heavy atoms by intense
                      {X}-ray free-electron laser pulses},
      journal      = {Nature photonics},
      volume       = {6},
      number       = {12},
      issn         = {1749-4893},
      address      = {London [u.a.]},
      publisher    = {Nature Publ. Group},
      reportid     = {FZJ-2014-01176},
      pages        = {858 - 865},
      year         = {2012},
      abstract     = {X-ray free-electron lasers provide unique opportunities for
                      exploring ultrafast dynamics and for imaging the structures
                      of complex systems. Understanding the response of individual
                      atoms to intense X-rays is essential for most free-electron
                      laser applications. First experiments have shown that, for
                      light atoms, the dominant interaction mechanism is
                      ionization by sequential electron ejection, where the
                      highest charge state produced is defined by the last ionic
                      state that can be ionized with one photon. Here, we report
                      an unprecedentedly high degree of ionization of xenon atoms
                      by 1.5 keV free-electron laser pulses to charge states with
                      ionization energies far exceeding the photon energy.
                      Comparing ion charge-state distributions and fluorescence
                      spectra with state-of-the-art calculations, we find that
                      these surprisingly high charge states are created via
                      excitation of transient resonances in highly charged ions,
                      and predict resonance enhanced absorption to be a general
                      phenomenon in the interaction of intense X-rays with systems
                      containing high-Z constituents.},
      cin          = {ZEA-2},
      ddc          = {530},
      cid          = {I:(DE-Juel1)ZEA-2-20090406},
      pnm          = {531 - Hadron Structure and Dynamics (HSD) (POF2-531)},
      pid          = {G:(DE-HGF)POF2-531},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000311892000016},
      doi          = {10.1038/nphoton.2012.261},
      url          = {https://juser.fz-juelich.de/record/151177},
}