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Title: Dynamic conductivity and partial ionization in dense fluid hydrogen

A theoretical description for the optical conduction experiments in dense fluid hydrogen is presented. Different quantum statistical approaches are used to describe the mechanism of electronic transport in hydrogen’s high-temperature dense phase. In this work, we show that at the onset of the metallic transition, optical conduction could be described by a strong rise in the atomic polarizability because of increased ionizations, whereas in the highly degenerate limit, the Ziman weak-scattering model better accounts for the observed saturation of reflectance. The inclusion of the effects of partial ionization in the highly degenerate region provides excellent agreement with experimental results. Hydrogen’s fluid metallic state is revealed to be a partially ionized free-electron plasma. Our results provide some of the first theoretical models that are experimentally benchmarked, as well as an important guide for future studies.
Authors:
 [1]
  1. Univ. of Rochester, NY (United States). Lab. for Laser Energetics; Harvard Univ., Cambridge, MA (United States). Lyman Lab. of Physics
Publication Date:
Report Number(s):
2017-238, 2376
Journal ID: ISSN 2470-0045; PLEEE8; 2017-238, 2376, 1418
Grant/Contract Number:
NA0001944; NNX14AP17H
Type:
Accepted Manuscript
Journal Name:
Physical Review E
Additional Journal Information:
Journal Volume: 97; Journal Issue: 4; Journal ID: ISSN 2470-0045
Publisher:
American Physical Society (APS)
Research Org:
Univ. of Rochester, NY (United States). Lab. for Laser Energetics
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA); National Aeronautic and Space Administration (NASA); New York State Energy Research and Development Authority (NYSERDA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; high-energy-density plasmas; plasma transport; hot dense plasma; strongly-coupled plasmas; warm-dense matter
OSTI Identifier:
1460106
Alternate Identifier(s):
OSTI ID: 1433462