Characterization of weakly excited final states by shakedown spectroscopy of laser-excited potassium

J. Schulz, S. Heinäsmäki, R. Sankari, T. Rander, A. Lindblad, H. Bergersen, G. Öhrwall, S. Svensson, E. Kukk, S. Aksela, and H. Aksela
Phys. Rev. A 74, 012705 – Published 6 July 2006

Abstract

3p shakedown spectra of laser excited potassium atoms as well as direct 3p photoemission of ground state potassium have been studied. These two excitation schemes lead to the same final states and thereby provide a good basis for a detailed study of the 3p5(4s3d)1 configurations of singly ionized potassium and the photoemission processes leading to these configurations. The comparison of direct photoemission from the ground state and conjugate shakedown spectra from 4p12 laser excited potassium made it possible to experimentally determine the character of final states that are only weakly excited in the direct photoemission but have a much higher relative intensity in the shakedown spectrum. Based on considerations of angular momentum and parity conservation the excitation scheme of the final states can be understood.

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  • Received 7 March 2006

DOI:https://doi.org/10.1103/PhysRevA.74.012705

©2006 American Physical Society

Authors & Affiliations

J. Schulz1,2,*, S. Heinäsmäki1, R. Sankari1,3, T. Rander2, A. Lindblad2, H. Bergersen2, G. Öhrwall2, S. Svensson2, E. Kukk3, S. Aksela1, and H. Aksela1

  • 1Department of Physical Sciences, University of Oulu, Box 3000, FIN-90014 Oulu, Finland
  • 2Department of Physics, Uppsala University, Box 530, SE-75121 Uppsala, Sweden
  • 3Department of Physics, University of Turku, FIN-20014 Turku, Finland

  • *Electronic address: Joachim.Schulz@maxlab.lu.se; permanent address: MAX-lab, Lund University, Box 118, 221 00 Lund, Sweden.

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Vol. 74, Iss. 1 — July 2006

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