Two-Photon Excitation and Relaxation of the $3d\mathrm{\text{\ensuremath{-}}}4d$ Resonance in Atomic Kr

Two-Photon Excitation and Relaxation of the $3 d − 4 d$ Resonance in Atomic Kr

M. Meyer, D. Cubaynes, V. Richardson, J. T. Costello, P. Radcliffe, W. B. Li, S. Düsterer, S. Fritzsche, A. Mihelic, K. G. Papamihail, and P. Lambropoulos

Phys. Rev. Lett. 104, 213001 – Published 27 May 2010

Abstract

Two-photon excitation of a single-photon forbidden Auger resonance has been observed and investigated using the intense extreme ultraviolet radiation from the free electron laser in Hamburg. At the wavelength 26.9 nm (46 eV) two photons promoted a $3 d$ core electron to the outer $4 d$ shell. The subsequent Auger decay, as well as several nonlinear above threshold ionization processes, were studied by electron spectroscopy. The experimental data are in excellent agreement with theoretical predictions and analysis of the underlying multiphoton processes.

Received 7 February 2010

DOI:https://doi.org/10.1103/PhysRevLett.104.213001

Authors & Affiliations

M. Meyer¹, D. Cubaynes¹, V. Richardson², J. T. Costello², P. Radcliffe³, W. B. Li³, S. Düsterer³, S. Fritzsche^4,5, A. Mihelic^6,7, K. G. Papamihail⁶, and P. Lambropoulos⁶

¹LIXAM, UMR 8624, CNRS-Université Paris Sud, Bâtiment 350, F-91405 Orsay Cedex, France
²National Center for Plasma Science and Technology and School of Physical Sciences, Dublin City University, Dublin, Ireland
³HASYLAB at DESY, Notkestraße 85, D-22607 Hamburg, Germany
⁴GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
⁵Department of Physics, P.O. Box 3000, Fin-90014 University of Oulu, Finland
⁶IESL-FORTH, P.O. Box 1527 and Physics Department, University of Crete, Heraklion, Crete 71110, Greece
⁷Jozef Stefan Institute, Jamova cesta 39, SI-1000 Ljubljana, Slovenia

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Vol. 104, Iss. 21 — 28 May 2010

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Physical Review Letters

Two-Photon Excitation and Relaxation of the 3d−4d Resonance in Atomic Kr

M. Meyer, D. Cubaynes, V. Richardson, J. T. Costello, P. Radcliffe, W. B. Li, S. Düsterer, S. Fritzsche, A. Mihelic, K. G. Papamihail, and P. Lambropoulos

Phys. Rev. Lett. 104, 213001 – Published 27 May 2010

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Two-Photon Excitation and Relaxation of the $3 d − 4 d$ Resonance in Atomic Kr