Carbon ionization from a quantum average-atom model up to gigabar pressures

Gérald Faussurier, Christophe Blancard, and Mandy Bethkenhagen
Phys. Rev. E 104, 025209 – Published 25 August 2021

Abstract

We use a nonrelativistic average-atom model to calculate carbon ionization at megabar and gigabar pressures. The pressure is calculated using the stress-tensor method. The electronic electrical conductivity is also considered using the Kubo-Greenwood approach. Comparisons are made with quantum molecular dynamic simulations. A good agreement is obtained for the pressure between the average-atom model and the quantum molecular dynamic simulations in the regime of gigabar pressures. However, the discrepancy already seen with the PURGATORIO code for the average ionization deduced from the quantum molecular dynamic simulations is also observed here with the present average-atom model. Excellent agreement with the PURGATORIO code is found for the average ionization.

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  • Received 18 March 2021
  • Revised 28 July 2021
  • Accepted 28 July 2021

DOI:https://doi.org/10.1103/PhysRevE.104.025209

©2021 American Physical Society

Physics Subject Headings (PhySH)

Plasma Physics

Authors & Affiliations

Gérald Faussurier* and Christophe Blancard

  • CEA, DAM, DIF, F-91297 Arpajon, France and Université Paris-Saclay, CEA, LMCE, F-91680 Bruyères-le-Châtel, France

Mandy Bethkenhagen

  • École Normale Supérieure de Lyon, Université Lyon 1, Laboratoire de Géologie de Lyon, CNRS UMR 5276, F-69364 Lyon Cedex 07, France and University of Rostock, 18051 Rostock, Germany

  • *gerald.faussurier@cea.fr

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Issue

Vol. 104, Iss. 2 — August 2021

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