Angle-Resolved Electron Spectroscopy of Laser-Assisted Auger Decay Induced by a Few-Femtosecond X-Ray Pulse

M. Meyer, P. Radcliffe, T. Tschentscher, J. T. Costello, A. L. Cavalieri, I. Grguras, A. R. Maier, R. Kienberger, J. Bozek, C. Bostedt, S. Schorb, R. Coffee, M. Messerschmidt, C. Roedig, E. Sistrunk, L. F. Di Mauro, G. Doumy, K. Ueda, S. Wada, S. Düsterer, A. K. Kazansky, and N. M. Kabachnik

Phys. Rev. Lett. 108, 063007 – Published 10 February 2012

Abstract

Two-color ( $x − ray + infrared$ ) electron spectroscopy is used for investigating laser-assisted $K L L$ Auger decay following $1 s$ photoionization of atomic Ne with few-femtosecond x-ray pulses from the Linac Coherent Light Source. In an angle-resolved experiment, the overall width of the laser-modified Auger-electron spectrum and its structure change significantly as a function of the emission angle. The spectra are characterized by a strong intensity variation of the sidebands revealing a gross structure. This variation is caused, as predicted by theory, by the interference of electrons emitted at different times within the duration of one optical cycle of the infrared dressing laser, which almost coincides with the lifetime of the Ne $1 s$ vacancy.

Received 4 October 2011

DOI:https://doi.org/10.1103/PhysRevLett.108.063007

Authors & Affiliations

M. Meyer¹, P. Radcliffe¹, T. Tschentscher¹, J. T. Costello², A. L. Cavalieri³, I. Grguras³, A. R. Maier^4,5, R. Kienberger⁴, J. Bozek⁶, C. Bostedt⁶, S. Schorb⁶, R. Coffee⁶, M. Messerschmidt⁶, C. Roedig⁷, E. Sistrunk⁷, L. F. Di Mauro⁷, G. Doumy⁸, K. Ueda⁹, S. Wada¹⁰, S. Düsterer¹¹, A. K. Kazansky^12,13,14, and N. M. Kabachnik^1,13,15

¹European XFEL GmbH, Albert-Einstein-Ring 19, D-22761 Hamburg, Germany
²School of Physical Sciences and NCPST, Dublin City University, Dublin 9, Ireland
³MPSD/CFEL, Notkestrasse 85, D-22607 Hamburg, Germany
⁴Max Planck Institut für Quantenoptik, James Frank Strasse, D-85748 Garching, Germany
⁵Ludwig-Maximilians Universität München, Department of Physics, Am Coulombwall 1, 85748 Garching, Germany
⁶Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
⁷Department of Physics, The Ohio State University, Columbus, Ohio 43210, USA
⁸Argonne National Laboratory, Argonne, Illinois 60439, USA
⁹Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
¹⁰Department of Physical Science, Hiroshima University, Kagamiyama, Higashi-Hiroshima 739-8526, Japan
¹¹HASYLAB at DESY, Notkestrasse 85, D-22607 Hamburg, Germany
¹²Departamento de Fisica de Materiales, UPV/EHU, E-20018 San Sebastian/Donostia, Spain
¹³Donostia International Physics Center (DIPC), E-20018 San Sebastian/Donostia, Spain
¹⁴IKERBASQUE, Basque Foundation for Science, E-48011 Bilbao, Spain
¹⁵Institute of Nuclear Physics, Moscow State University, Moscow 119991, Russia