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

Röpke, Gerd; Blaschke, David; Döppner, Tilo; Lin, Chengliang; Kraeft, Wolf-Dietrich; Redmer, Ronald; Reinholz, Heidi

doi:10.1103/PhysRevE.99.033201

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

Journal Article · Sun Mar 03 23:00:00 EST 2019 · Physical Review. E

DOI:https://doi.org/10.1103/PhysRevE.99.033201· OSTI ID:1526162

Röpke, Gerd ^[1]; Blaschke, David ^[2]; Döppner, Tilo ^[3]; Lin, Chengliang ^[4]; Kraeft, Wolf-Dietrich ^[4]; Redmer, Ronald ^[4]; Reinholz, Heidi ^[5]

Univ. Rostock (Germany); National Research Nuclear Univ., Moscow (Russian Federation)
National Research Nuclear Univ., Moscow (Russian Federation); Univ. of Wroclaw (Poland); Joint Inst. for Nuclear Research (JINR), Dubna (Russian Federation)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Univ. Rostock (Germany)
Univ. Rostock (Germany); Univ. of Western Australia, Crawley, WA (Australia)

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.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1526162

Alternate ID(s):: OSTI ID: 1546335
OSTI ID: 1635454

Report Number(s):: LLNL-JRNL--763468; 952264

Journal Information:: Physical Review. E, Journal Name: Physical Review. E Journal Issue: 3 Vol. 99; ISSN PLEEE8; ISSN 2470-0045

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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