TY  - JOUR
AU  - Rudek, Benedikt
AU  - Son, Sang-Kil
AU  - Foucar, Lutz
AU  - Epp, Sascha W.
AU  - Erk, Benjamin
AU  - Hartmann, Robert
AU  - Adolph, Marcus
AU  - Andritschke, Robert
AU  - Aquila, Andrew
AU  - Berrah, Nora
AU  - Bostedt, Christoph
AU  - Bozek, John
AU  - Coppola, Nicola
AU  - Filsinger, Frank
AU  - Gorke, Hubert
AU  - Gorkhover, Tais
AU  - Graafsma, Heinz
AU  - Gumprecht, Lars
AU  - Hartmann, Andreas
AU  - Hauser, Günter
AU  - Herrmann, Sven
AU  - Hirsemann, Helmut
AU  - Holl, Peter
AU  - Hömke, André
AU  - Journel, Loic
AU  - Kaiser, Christian
AU  - Kimmel, Nils
AU  - Krasniqi, Faton
AU  - Kühnel, Kai-Uwe
AU  - Matysek, Michael
AU  - Messerschmidt, Marc
AU  - Miesner, Danilo
AU  - Möller, Thomas
AU  - Moshammer, Robert
AU  - Nagaya, Kiyonobu
AU  - Nilsson, Björn
AU  - Potdevin, Guillaume
AU  - Pietschner, Daniel
AU  - Reich, Christian
AU  - Rupp, Daniela
AU  - Schaller, Gerhard
AU  - Schlichting, Ilme
AU  - Schmidt, Carlo
AU  - Schopper, Florian
AU  - Schorb, Sebastian
AU  - Schröter, Claus-Dieter
AU  - Schulz, Joachim
AU  - Simon, Marc
AU  - Soltau, Heike
AU  - Strüder, Lothar
AU  - Ueda, Kiyoshi
AU  - Weidenspointner, Georg
AU  - Santra, Robin
AU  - Ullrich, Joachim
AU  - Rudenko, Artem
AU  - Rolles, Daniel
TI  - Ultra-efficient ionization of heavy atoms by intense X-ray free-electron laser pulses
JO  - Nature photonics
VL  - 6
IS  - 12
SN  - 1749-4893
CY  - London [u.a.]
PB  - Nature Publ. Group
M1  - FZJ-2014-01176
SP  - 858 - 865
PY  - 2012
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000311892000016
DO  - DOI:10.1038/nphoton.2012.261
UR  - https://juser.fz-juelich.de/record/151177
ER  -