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Title: Comment on "Continuum Lowering and Fermi-Surface Rising in Stromgly Coupled and Degenerate Plasmas"

Abstract

In a recent Letter, Hu [1] reported photon absorption cross sections in strongly coupled, degenerate plasmas from quantum molecular dynamics (QMD). The Letter claims that the K-edge shift as a function of plasma density computed with simple ionization potential depression (IPD) models are in violent disagreement with the QMD results. The QMD calculations displayed an increase in Kedge shift with increasing density while the simpler models yielded a decrease. Here, this Comment shows that the claimed large errors reported by Hu for the widely used Stewart- Pyatt (SP) model [2] stem from an invalid comparison of disparate physical quantities and is largely resolved by including well-known corrections for degenerate systems.

Authors:
 [1];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1455397
Alternate Identifier(s):
OSTI ID: 1426521
Report Number(s):
LLNL-JRNL-738842
Journal ID: ISSN 0031-9007; 892189; TRN: US1901229
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 120; Journal Issue: 11; Related Information: 892189; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Iglesias, C. A., and Sterne, P. A. Comment on "Continuum Lowering and Fermi-Surface Rising in Stromgly Coupled and Degenerate Plasmas". United States: N. p., 2018. Web. doi:10.1103/PhysRevLett.120.119501.
Iglesias, C. A., & Sterne, P. A. Comment on "Continuum Lowering and Fermi-Surface Rising in Stromgly Coupled and Degenerate Plasmas". United States. doi:10.1103/PhysRevLett.120.119501.
Iglesias, C. A., and Sterne, P. A. Fri . "Comment on "Continuum Lowering and Fermi-Surface Rising in Stromgly Coupled and Degenerate Plasmas"". United States. doi:10.1103/PhysRevLett.120.119501. https://www.osti.gov/servlets/purl/1455397.
@article{osti_1455397,
title = {Comment on "Continuum Lowering and Fermi-Surface Rising in Stromgly Coupled and Degenerate Plasmas"},
author = {Iglesias, C. A. and Sterne, P. A.},
abstractNote = {In a recent Letter, Hu [1] reported photon absorption cross sections in strongly coupled, degenerate plasmas from quantum molecular dynamics (QMD). The Letter claims that the K-edge shift as a function of plasma density computed with simple ionization potential depression (IPD) models are in violent disagreement with the QMD results. The QMD calculations displayed an increase in Kedge shift with increasing density while the simpler models yielded a decrease. Here, this Comment shows that the claimed large errors reported by Hu for the widely used Stewart- Pyatt (SP) model [2] stem from an invalid comparison of disparate physical quantities and is largely resolved by including well-known corrections for degenerate systems.},
doi = {10.1103/PhysRevLett.120.119501},
journal = {Physical Review Letters},
number = 11,
volume = 120,
place = {United States},
year = {2018},
month = {3}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 1 work
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Figures / Tables:

Fig 1 Fig 1: K-edge photon absorption feature, EK, as a function of mass density from QMD, TFSP model, and Purgatorio for carbon plasmas at the conditions used in the QMD calculations.

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Works referenced in this record:

Continuum Lowering and Fermi-Surface Rising in Strongly Coupled and Degenerate Plasmas
journal, August 2017


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    Figures / Tables found in this record:

      Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.