Photoionization microscopy of the lithium atom: Wave-function imaging of quasibound and continuum Stark states

S. Cohen, M. M. Harb, A. Ollagnier, F. Robicheaux, M. J. J. Vrakking, T. Barillot, F. Lépine, and C. Bordas
Phys. Rev. A 94, 013414 – Published 19 July 2016

Abstract

Photoionization of an atom in the presence of a uniform static electric field provides the unique opportunity to expand and visualize the atomic wave function at a macroscopic scale. In a number of seminal publications dating back to the 1980s, Fabrikant, Demkov, Kondratovich, and Ostrovsky showed that this goal could be achieved by projecting slow (meV) photoionized electrons onto a position-sensitive detector and underlined the distinction between continuum and resonant contributions. The uncovering of resonant signatures was achieved fairly recently in experiments on the nonhydrogenic lithium atoms [Cohen et al., Phys. Rev. Lett. 110, 183001 (2013)]. The purpose of the present article is the general description of these findings, with emphasis on the various manifestations of resonant character. From this point of view, lithium has been chosen as an illustrative example between the two limiting cases of hydrogen, where resonance effects are more easily identified, and heavy atoms like xenon, where resonant effects were not observed.

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  • Received 31 March 2016
  • Revised 13 June 2016

DOI:https://doi.org/10.1103/PhysRevA.94.013414

©2016 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

S. Cohen1, M. M. Harb2, A. Ollagnier2, F. Robicheaux3, M. J. J. Vrakking4, T. Barillot2, F. Lépine2, and C. Bordas2

  • 1Atomic and Molecular Physics Laboratory, Physics Department, University of Ioannina, 45110 Ioannina, Greece
  • 2Institut Lumière Matière, Université Lyon 1, CNRS, UMR5306, 10 Rue Ada Byron, 69622 Villeurbanne Cedex, France
  • 3Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
  • 4Max-Born-Institut, Max Born Straße 2A, D-12489 Berlin, Germany

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Issue

Vol. 94, Iss. 1 — July 2016

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