Two-photon double ionization of Ne by free-electron laser radiation: a 
kinematically complete experiment

Kurka, M.; Rudenko, A.; Foucar, L.; Kühnel, K. U.; Jiang, Y. H.; Ergler, T.; Havermeier, T.; Smolarski, M.; Schössler, S.; Cole, K.; Schöffler, M.; Dörner, R.; Gensch, M.; Düsterer, S.; Treusch, R.; Fritzsche, S.; Grum-Grzhimailo, A. N.; Gryzlova, E. V.; Kabachnik, N. M.; Schröter, C. D.; Moshammer, R.; Ullrich, J.

doi:10.1088/0953-4075/42/14/141002

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Two-photon double ionization of Ne by free-electron laser radiation: a kinematically complete experiment

MPS-Authors

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Kurka, M.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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Rudenko, A.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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Foucar, L.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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Kühnel, K. U.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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Jiang, Y. H.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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Ergler, T.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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Dörner, R.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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Fritzsche, S.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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Kabachnik, N. M.
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;

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Schröter, C. D.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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Moshammer, R.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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Ullrich, J.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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Citation

Kurka, M., Rudenko, A., Foucar, L., Kühnel, K. U., Jiang, Y. H., Ergler, T., et al. (2009). Two-photon double ionization of Ne by free-electron laser radiation: a kinematically complete experiment. Journal of Physics B: Atomic, Molecular and Optical Physics, 42(14): 141002, pp. 1-5. doi:10.1088/0953-4075/42/14/141002.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0011-753E-F

Abstract

We present kinematically complete data on two-photon double ionization of Ne induced by short (∼25 fs) intense (∼5 × 1013 W cm−2) free-electron laser pulses at 44 eV. The observed electron energy spectrum points to the dominance of ‘sequential’ ionization. We analyse state-selective angular distributions as well as the two-electron angular correlation function, and suggest a method to determine the time delay between both ionization steps. The measured angular asymmetry ( ß-) parameters significantly deviate from the results of an earlier non-coincident experiment providing benchmark data for theory.