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Journal Article

Photoelectron Diffraction Imaging of a Molecular Breakup Using an X-Ray Free-Electron Laser

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Trinter,  Florian       
Deutsches Elektronen-Synchrotron (DESY);
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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PhysRevX.10.021052.pdf
(Publisher version), 547KB

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Citation

Kastirke, G., Schöffler, M. S., Weller, M., Rist, J., Boll, R., Anders, N., et al. (2020). Photoelectron Diffraction Imaging of a Molecular Breakup Using an X-Ray Free-Electron Laser. Physical Review X, 10(2): 021052. doi:10.1103/PhysRevX.10.021052.


Cite as: https://hdl.handle.net/21.11116/0000-0006-8AF3-C
Abstract
A central motivation for the development of x-ray free-electron lasers has been the prospect of time- resolved single-molecule imaging with atomic resolution. Here, we show that x-ray photoelectron diffraction—where a photoelectron emitted after x-ray absorption illuminates the molecular structure from within—can be used to image the increase of the internuclear distance during the x-ray-induced fragmentation of an O2 molecule. By measuring the molecular-frame photoelectron emission patterns for a two-photon sequential K-shell ionization in coincidence with the fragment ions, and by sorting the data as a function of the measured kinetic energy release, we can resolve the elongation of the molecular bond by approximately 1.2 a.u. within the duration of the x-ray pulse. The experiment paves the road toward time- resolved pump-probe photoelectron diffraction imaging at high-repetition-rate x-ray free-electron lasers.