Ionization-potential depression and dynamical structure factor in dense plasmas

Chengliang Lin, Gerd Röpke, Wolf-Dietrich Kraeft, and Heidi Reinholz
Phys. Rev. E 96, 013202 – Published 6 July 2017

Abstract

The properties of a bound electron system immersed in a plasma environment are strongly modified by the surrounding plasma. The modification of an essential quantity, the ionization energy, is described by the electronic and ionic self-energies, including dynamical screening within the framework of the quantum statistical theory. Introducing the ionic dynamical structure factor as the indicator for the ionic microfield, we demonstrate that ionic correlations and fluctuations play a critical role in determining the ionization potential depression. This is, in particular, true for mixtures of different ions with large mass and charge asymmetry. The ionization potential depression is calculated for dense aluminum plasmas as well as for a CH plasma and compared to the experimental data and more phenomenological approaches used so far.

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  • Received 9 March 2017

DOI:https://doi.org/10.1103/PhysRevE.96.013202

©2017 American Physical Society

Physics Subject Headings (PhySH)

Plasma Physics

Authors & Affiliations

Chengliang Lin1,*, Gerd Röpke1,†, Wolf-Dietrich Kraeft1,‡, and Heidi Reinholz1,2,§

  • 1Universität Rostock, Institut für Physik, 18051 Rostock, Germany
  • 2University of Western Australia School of Physics, WA 6009 Crawley, Australia

  • *Corresponding author: chengliang.lin@uni-rostock.de
  • gerd.roepke@uni-rostock.de
  • wolf-dietrich.kraeft@uni-rostock.de
  • §heidi.reinholz@uni-rostock.de

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Vol. 96, Iss. 1 — July 2017

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