journal article·2015-08-06

Charge and Nuclear Dynamics Induced by Deep Inner-Shell Multiphoton Ionization of CH3I Molecules by Intense X-ray Free-Electron Laser Pulses

Koji Motomura, Edwin Kukk, Hironobu Fukuzawa, Shin-ichi Wada, Kiyonobu Nagaya, Satoshi Ohmura, Subhendu Mondal, Tetsuya Tachibana, Yuta Ito, Ryosuke Koga, Tsukasa Sakai, Kenji Matsunami, Artem Rudenko, Christophe Nicolas, Xiao-Jing Liu, Catalin Miron, Yizhu Zhang, Yuhai Jiang, Jianhui Chen, Mailam Anand, Dong Eon Kim, Kensuke Tono, Makina Yabashi, Makoto Yao, Kiyoshi Ueda

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Abstract

In recent years, free-electron lasers operating in the true X-ray regime have opened up access to the femtosecond-scale dynamics induced by deep inner-shell ionization. We have investigated charge creation and transfer dynamics in the context of molecular Coulomb explosion of a single molecule, exposed to sequential deep inner-shell ionization within an ultrashort (10 fs) X-ray pulse. The target molecule was CH3I, methane sensitized to X-rays by halogenization with a heavy element, iodine. Time-of-flight ion spectroscopy and coincident ion analysis was employed to investigate, via the properties of the atomic fragments, single-molecule charge states of up to +22. Experimental findings have been compared with a parametric model of simultaneous Coulomb explosion and charge transfer in the molecule. The study demonstrates that including realistic charge dynamics is imperative when molecular Coulomb explosion experiments using short-pulse facilities are performed.
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Research context

OpenAlex topics: Advanced X-ray Imaging Techniques · Advanced Electron Microscopy Techniques and Applications · Enzyme Structure and Function

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan

Department of Physics and Astronomy, University of Turku, Turku FI-20014, Finland

RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan

Department of Physical Science, Hiroshima University, Higashi-Hiroshima 739-8526, Japan

Department of Physics, Kyoto University, Kyoto 606-8502, Japan

J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, United States

Synchrotron SOLEIL, L’Orme des Merisiers, Saint-Aubin, BP 48, FR-91192 Gif-sur-Yvette Cedex, France

Extreme Light Infrastructure - Nuclear Physics (ELI-NP), “Horia Hulubei” National Institute for Physics and Nuclear Engineering, 30 Reactorului Street, RO-077125 Măgurele, Jud. Ilfov, Romania

Shanghai Advanced Research Institute, Chinese Academy of Sciences, 201210 Shanghai, China

Shanghai Institute of Applied Physics, Chinese Academy of Sciences, 201800 Shanghai, China

Department of Physics, CASTECH, MPC-AS, POSTECH, Pohang, Korea

Japan Synchrotron Radiation Research Institute (JASRI), Sayo, Hyogo 679-5198, Japan

Funding

European Cooperation in Science and Technology · Ministry of Education, Culture, Sports, Science, and Technology · National Research Foundation of Korea · Science and Technology Commission of Shanghai Municipality · National Natural Science Foundation of China · Japan Society for the Promotion of Science · Centre National de la Recherche Scientifique · Ministry of Science and Technology of the People's Republic of China · Suomen Akatemia · Basic Energy Sciences

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