Auger electron wave packet interferometry on extreme timescales with coherent soft x-rays. (25th November 2020)

• Record Type: Journal Article
• Authors: Usenko, Sergey; Schwickert, David; Przystawik, Andreas; Baev, Karolin; Baev, Ivan; Braune, Markus; Bocklage, Lars; Czwalinna, Marie Kristin; Deinert, Sascha; Düsterer, Stefan; Hans, Andreas; Hartmann, Gregor; Haunhorst, Christian; Kuhlmann, Marion; Palutke, Steffen; Röhlsberger, Ralf; Rönsch-Schulenburg, Juliane; Schmidt, Philipp; Skruszewicz, Slawomir; Toleikis, Sven; Viefhaus, Jens; Martins, Michael; Knie, André; Kip, Detlef; Laarmann, Tim
• Is Part Of: Journal of physics. Volume 53:Number 24(2020:Dec. 15)
• Publication Date: 2020-11-25
• Subjects: Auger effect -- inner-shell excitation -- free-electron lasers; Atoms -- Periodicals; Molecules -- Periodicals; Optics -- Periodicals; Nuclear physics -- Periodicals; 539.6
• DOI: 10.1088/1361-6455/abc661
• Languages: English
• ISSNs: 0953-4075

Abstract

Abstract: Wave packet interferometry provides benchmark information on light-induced electronic quantum states by monitoring their relative amplitudes and phases during coherent excitation, propagation, and decay. The relative phase control of soft x-ray pulse replicas on the single-digit attosecond timescale achieved in our experiments makes this method a powerful tool to probe ultrafast quantum phenomena such as the excitation of Auger shake-up states with sub-cycle precision. In this contribution we present first results obtained for different Auger decay channels upon generating L-shell vacancies in argon atoms using Michelson-type all-reflective interferometric autocorrelation at a central free-electron laser photon energy of 274.7 eV.