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学術論文

Deep inner-shell multiphoton ionization by intense x-ray free-electron laser pulses

MPS-Authors
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Rudek,  Benedikt
Department of Biomolecular Mechanisms, Max Planck Institute for Medical Research, Max Planck Society;

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Erk,  Benjamin
Department of Biomolecular Mechanisms, Max Planck Institute for Medical Research, Max Planck Society;

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Foucar,  Lutz
Department of Biomolecular Mechanisms, Max Planck Institute for Medical Research, Max Planck Society;

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引用

Fukuzawa, H., Son, S.-K., Motomura, K., Mondal, S., Nagaya, K., Wada, S., Liu, X.-J., Feifel, R., Tachibana, T., Ito, Y., Kimura, M., Sakai, T., Matsunami, K., Hayashita, H., Kajikawa, J., Johnsson, P., Siano, M., Kukk, E., Rudek, B., Erk, B., Foucar, L., Robert, E., Miron, C., Tono, K., Inubushi, Y., Hatsui, T., Yabashi, M., Yao, M., Santra, R., & Ueda, K. (2013). Deep inner-shell multiphoton ionization by intense x-ray free-electron laser pulses. Physical Review Letters, 110(17):, pp. 1-5. doi:10.1103/PhysRevLett.110.173005.


引用: http://hdl.handle.net/11858/00-001M-0000-0019-90AE-9
要旨
We have investigated multiphoton multiple ionization dynamics of xenon atoms using a new x-ray free-electron laser facility, SPring-8 Angstrom Compact free electron LAser (SACLA) in Japan, and identified that Xen+ with n up to 26 is produced at a photon energy of 5.5 keV. The observed high charge states (n≥24) are produced via five-photon absorption, evidencing the occurrence of multiphoton absorption involving deep inner shells. A newly developed theoretical model, which shows good agreement with the experiment, elucidates the complex pathways of sequential electronic decay cascades accessible in heavy atoms. The present study of heavy-atom ionization dynamics in high-intensity hard-x-ray pulses makes a step forward towards molecular structure determination with x-ray free-electron lasers.