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Imaging molecular structure through femtosecond photoelectron diffraction on aligned and oriented gas-phase molecules

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Epp,  Sascha
Deutsches Elektronen-Synchrotron (DESY);
Max Planck Advanced Study Group at CFEL;
Max Planck Institute for Nuclear Physics;
Max Planck Institute for Structural Dynamics;
Miller Group, Atomically Resolved Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;

Filsinger,  Frank
Molecular Physics, Fritz Haber Institute, Max Planck Society;

Küpper,  Jochen
Max Planck Advanced Study Group at CFEL;
Center for Free-Electron Laser Science, DESY;
Department of Physics, University of Hamburg;
Center for Ultrafast Imaging, University of Hamburg;
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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Citation

Boll, R., Rouzée, A., Adolph, M., Anielski, D., Aquila, A., Bari, S., et al. (2014). Imaging molecular structure through femtosecond photoelectron diffraction on aligned and oriented gas-phase molecules. Faraday Discussions, 171, 57-80. doi:10.1039/C4FD00037D.


Cite as: https://hdl.handle.net/11858/00-001M-0000-002D-F1CA-4
Abstract
This paper gives an account of our progress towards performing femtosecond time-resolved photoelectron diffraction on gas-phase molecules in a pump–probe setup combining optical lasers and an X-ray free-electron laser. We present results of two experiments aimed at measuring photoelectron angular distributions of laser-aligned 1-ethynyl-4-fluorobenzene (C8H5F) and dissociating, laser-aligned 1,4-dibromobenzene (C6H4Br2) molecules and discuss them in the larger context of photoelectron diffraction on gas-phase molecules. We also show how the strong nanosecond laser pulse used for adiabatically laser-aligning the molecules influences the measured electron and ion spectra and angular distributions, and discuss how this may affect the outcome of future time-resolved photoelectron diffraction experiments.