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Title: Ionization potential depression and Pauli blocking in degenerate plasmas at extreme densities

Abstract

New facilities explore warm dense matter (WDM) at conditions with extreme densities (exceeding ten times condensed matter densities) so that electrons are degenerate even at temperatures of 10 - 100 eV. Whereas in the non-degenerate region correlation effects such as Debye screening are relevant for the ionization potential depression (IPD), new effects have to be considered in degenerate plasmas. In addition to the Fock shift of the self-energies, the bound-state Pauli blocking becomes important with increasing density. Standard approaches to IPD such as Stewart-Pyatt and widely used opacity tables (e.g., OPAL) do not contain Pauli blocking effects for bound states. The consideration of degeneracy effects leads to a reduction of the ionization potential and to a higher degree of ionization. As an example, we present calculations for the ionization degree of carbon plasmas at T = 100 eV and extreme densities up to 40 g/cm 3, which are relevant to experiments that are currently scheduled at the National Ignition Facility.

Authors:
 [1];  [2];  [3];  [4];  [4];  [4];  [5]
  1. Univ. Rostock (Germany); National Research Nuclear Univ., Moscow (Russian Federation)
  2. National Research Nuclear Univ., Moscow (Russian Federation); Univ. of Wroclaw (Poland); Joint Inst. for Nuclear Research (JINR), Dubna (Russian Federation)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  4. Univ. Rostock (Germany)
  5. Univ. Rostock (Germany); Univ. of Western Australia, Crawley, WA (Australia)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1526162
Alternate Identifier(s):
OSTI ID: 1546335
Report Number(s):
LLNL-JRNL-763468
Journal ID: ISSN 2470-0045; PLEEE8; 952264
Grant/Contract Number:  
AC52-07NA27344; 18-ERD-033
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review E
Additional Journal Information:
Journal Volume: 99; Journal Issue: 3; Journal ID: ISSN 2470-0045
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Röpke, Gerd, Blaschke, David, Döppner, Tilo, Lin, Chengliang, Kraeft, Wolf-Dietrich, Redmer, Ronald, and Reinholz, Heidi. Ionization potential depression and Pauli blocking in degenerate plasmas at extreme densities. United States: N. p., 2019. Web. doi:10.1103/PhysRevE.99.033201.
Röpke, Gerd, Blaschke, David, Döppner, Tilo, Lin, Chengliang, Kraeft, Wolf-Dietrich, Redmer, Ronald, & Reinholz, Heidi. Ionization potential depression and Pauli blocking in degenerate plasmas at extreme densities. United States. doi:10.1103/PhysRevE.99.033201.
Röpke, Gerd, Blaschke, David, Döppner, Tilo, Lin, Chengliang, Kraeft, Wolf-Dietrich, Redmer, Ronald, and Reinholz, Heidi. Mon . "Ionization potential depression and Pauli blocking in degenerate plasmas at extreme densities". United States. doi:10.1103/PhysRevE.99.033201.
@article{osti_1526162,
title = {Ionization potential depression and Pauli blocking in degenerate plasmas at extreme densities},
author = {Röpke, Gerd and Blaschke, David and Döppner, Tilo and Lin, Chengliang and Kraeft, Wolf-Dietrich and Redmer, Ronald and Reinholz, Heidi},
abstractNote = {New facilities explore warm dense matter (WDM) at conditions with extreme densities (exceeding ten times condensed matter densities) so that electrons are degenerate even at temperatures of 10 - 100 eV. Whereas in the non-degenerate region correlation effects such as Debye screening are relevant for the ionization potential depression (IPD), new effects have to be considered in degenerate plasmas. In addition to the Fock shift of the self-energies, the bound-state Pauli blocking becomes important with increasing density. Standard approaches to IPD such as Stewart-Pyatt and widely used opacity tables (e.g., OPAL) do not contain Pauli blocking effects for bound states. The consideration of degeneracy effects leads to a reduction of the ionization potential and to a higher degree of ionization. As an example, we present calculations for the ionization degree of carbon plasmas at T = 100 eV and extreme densities up to 40 g/cm3, which are relevant to experiments that are currently scheduled at the National Ignition Facility.},
doi = {10.1103/PhysRevE.99.033201},
journal = {Physical Review E},
number = 3,
volume = 99,
place = {United States},
year = {2019},
month = {3}
}

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This content will become publicly available on March 4, 2020
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