Comment on “Photoionization of helium atoms irradiated with intense vacuum ultraviolet free-electron laser light. Part I. Experimental study of multiphoton and single-photon processes”

Dimitrios Charalambidis, P. Tzallas, N. A. Papadogiannis, L. A. A. Nikolopoulos, E. P. Benis, and G. D. Tsakiris
Phys. Rev. A 74, 037401 – Published 6 September 2006
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Abstract

The reported observation of two-photon ionization of He by 13eV photons of the TESLA Facility in T. Laarmann, A. R. B. de Castro, P. Gürtler, W. Laasch, J. Schulz, H. Wabnitz, and T. Möller, Phys. Rev. A72, 023409 (2005) is ambiguous, as it is not supported by the experimental data presented. We discuss the lack of evidence for the claimed two-photon ionization.

  • Received 2 February 2006

DOI:https://doi.org/10.1103/PhysRevA.74.037401

©2006 American Physical Society

Authors & Affiliations

Dimitrios Charalambidis1,2, P. Tzallas1, N. A. Papadogiannis3, L. A. A. Nikolopoulos4, E. P. Benis1, and G. D. Tsakiris5

  • 1Foundation for Research and Technology Hellas, Institute of Electronic Structure and Laser, P.O. Box 1527, 71110 Heraklion, Greece
  • 2Physics Department, University of Crete, P.O. Box 2208, 71003 Heraklion, Greece
  • 3Technological Educational Institution of Crete at Rethymnon, GR-74100, Rethymnon, Crete, Greece
  • 4Department of Telecom, Science & Technology, University of Peloponnisos, GR-22100 Tripoli, Greece
  • 5Max-Planck-Institut für Quantenoptik, D-85748 Garhing, Germany

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Reply to “Comment on ‘Photoionization of helium atoms irradiated with intense vacuum ultraviolet free-electron laser light. Part I. Experimental study of multiphoton and single-photon processes’ ”

T. Laarmann, A. R. B. de Castro, P. Gürtler, W. Laasch, J. Schulz, H. Wabnitz, and T. Möller
Phys. Rev. A 74, 037402 (2006)

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Original Article

  Photoionization of helium atoms irradiated with intense vacuum ultraviolet free-electron laser light. Part I. Experimental study of multiphoton and single-photon processes

T. Laarmann, A. R. B. de Castro, P. Gürtler, W. Laasch, J. Schulz, H. Wabnitz, and T. Möller
Phys. Rev. A 72, 023409 (2005)

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Vol. 74, Iss. 3 — September 2006

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