Inner-shell multiple ionization of polyatomic molecules with an intense x-ray 
free-electron laser studied by coincident ion momentum imaging

Erk, Benjamin; Rolles, Daniel; Foucar, Lutz; Rudek, Benedikt; Epp, S W; Cryle, Max; Bostedt, C; Schorb, S; Bozek, J; Rouzee, A; Hundertmark, A; Marchenko, T; Simon, M; Filsinger, F; Christensen, L; De, S; Trippel, S; Küpper, J; Stapelfeldt, H; Wada, S; Ueda, K; Swiggers, M; Messerschmidt, M; Schröter, C D; Moshammer, R; Schlichting, Ilme; Ullrich, J; Rudenko, A

doi:10.1088/0953-4075/46/16/164031

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Inner-shell multiple ionization of polyatomic molecules with an intense x-ray free-electron laser studied by coincident ion momentum imaging

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

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Rolles, Daniel
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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Rudek, Benedikt
Department of Biomolecular Mechanisms, Max Planck Institute for Medical Research, Max Planck Society;

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

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Schlichting, Ilme
Department of Biomolecular Mechanisms, Max Planck Institute for Medical Research, Max Planck Society;

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http://iopscience.iop.org/0953-4075/46/16/164031/pdf/0953-4075_46_16_164031.pdf
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http://dx.doi.org/10.1088/0953-4075/46/16/164031
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Citation

Erk, B., Rolles, D., Foucar, L., Rudek, B., Epp, S. W., Cryle, M., et al. (2013). Inner-shell multiple ionization of polyatomic molecules with an intense x-ray free-electron laser studied by coincident ion momentum imaging. Journal of Physics B, 46(16): 164031, pp. 1-12. doi:10.1088/0953-4075/46/16/164031.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0019-903F-5

Abstract

The ionization and fragmentation of two selenium containing hydrocarbon molecules, methylselenol (CH3SeH) and ethylselenol (C2H5SeH), by intense (>1017 W cm−2) 5 fs x-ray pulses with photon energies of 1.7 and 2 keV has been studied by means of coincident ion momentum spectroscopy. Measuring charge states and ion kinetic energies, we find signatures of charge redistribution within the molecular environment. Furthermore, by analyzing fragment ion angular correlations, we can determine the laboratory-frame orientation of individual molecules and thus investigate the fragmentation dynamics in the molecular frame. This allows distinguishing protons originating from different molecular sites along with identifying the reaction channels that lead to their emission.