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Clocking Auger electrons

MPS-Authors
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Haynes,  D.
Extreme Timescales, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free-Electron Laser Science;
The Hamburg Centre for Ultrafast Imaging, Universität Hamburg;
International Max Planck Research School for Ultrafast Imaging & Structural Dynamics (IMPRS-UFAST), Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;

Grguraš,  I.
Extreme Timescales, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free-Electron Laser Science;

Singla,  R.
Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free-Electron Laser Science;

Tellkamp,  F.
Machine Physics, Scientific Service Units, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free-Electron Laser Science;

Cavalieri,  A. L.
Extreme Timescales, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free-Electron Laser Science;
The Hamburg Centre for Ultrafast Imaging, Universität Hamburg;
Paul Scherrer Institute, Switzerland;
Institute of Applied Physics, University of Bern;

External Ressource
Fulltext (public)

2003.10398.pdf
(Preprint), 1018KB

Supplementary Material (public)

41567_2020_1111_MOESM1_ESM.pdf
(Supplementary material), 588KB

Citation

Haynes, D., Wurzer, M., Schletter, A., Al-Haddad, A., Blaga, C., Bostedt, C., et al. (2021). Clocking Auger electrons. Nature Physics. doi:10.1038/s41567-020-01111-0.


Cite as: http://hdl.handle.net/21.11116/0000-0007-B4E0-0
Abstract
Intense X-ray free-electron lasers (XFELs) can rapidly excite matter, leaving it in inherently unstable states that decay on femtosecond timescales. The relaxation occurs primarily via Auger emission, so excited-state observations are constrained by Auger decay. In situ measurement of this process is therefore crucial, yet it has thus far remained elusive in XFELs owing to inherent timing and phase jitter, which can be orders of magnitude larger than the timescale of Auger decay. Here we develop an approach termed ‘self-referenced attosecond streaking’ that provides subfemtosecond resolution in spite of jitter, enabling time-domain measurement of the delay between photoemission and Auger emission in atomic neon excited by intense, femtosecond pulses from an XFEL. Using a fully quantum-mechanical description that treats the ionization, core-hole formation and Auger emission as a single process, the observed delay yields an Auger decay lifetime of 2.2_−0.3^+0.2 fs for the KLL decay channel.