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Title: A study of the contribution of doubly excited ionic states to the properties of hot dense high-Z plasmas

Abstract

The role of two-electron processes, i.e. dielectronic recombination and autoionization, in the ionization balance and X-ray emission of hot dense plasmas composed of various high-Z materials is explored. Tungsten, gold, lead and uranium are considered. It is shown that the average ion charge and the high-energy emissivity are both sensitive to the dielectronic recombination rate. A systematic study demonstrates the degree of this sensitivity. It is found that the complete neglect of these 2-electron processes introduces a large error but once included, the key physical properties are quite insensitive to the rate over the important 2–3 keV temperature range. The high-energy emissivity depends strongly on temperature, peaking at conditions corresponding to a closed shell system, and on the square of the electron density, as for a coronal system.

Authors:
 [1];  [2];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Old Dominion Univ., Norfolk, VA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1430948
Report Number(s):
LLNL-JRNL-480854
Journal ID: ISSN 1574-1818
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
High Energy Density Physics
Additional Journal Information:
Journal Volume: 7; Journal Issue: 4; Journal ID: ISSN 1574-1818
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION

Citation Formats

Scott, H. A., Whelan, Colm T., and Glenzer, S. H.. A study of the contribution of doubly excited ionic states to the properties of hot dense high-Z plasmas. United States: N. p., 2011. Web. doi:10.1016/j.hedp.2011.08.001.
Scott, H. A., Whelan, Colm T., & Glenzer, S. H.. A study of the contribution of doubly excited ionic states to the properties of hot dense high-Z plasmas. United States. doi:10.1016/j.hedp.2011.08.001.
Scott, H. A., Whelan, Colm T., and Glenzer, S. H.. Wed . "A study of the contribution of doubly excited ionic states to the properties of hot dense high-Z plasmas". United States. doi:10.1016/j.hedp.2011.08.001. https://www.osti.gov/servlets/purl/1430948.
@article{osti_1430948,
title = {A study of the contribution of doubly excited ionic states to the properties of hot dense high-Z plasmas},
author = {Scott, H. A. and Whelan, Colm T. and Glenzer, S. H.},
abstractNote = {The role of two-electron processes, i.e. dielectronic recombination and autoionization, in the ionization balance and X-ray emission of hot dense plasmas composed of various high-Z materials is explored. Tungsten, gold, lead and uranium are considered. It is shown that the average ion charge and the high-energy emissivity are both sensitive to the dielectronic recombination rate. A systematic study demonstrates the degree of this sensitivity. It is found that the complete neglect of these 2-electron processes introduces a large error but once included, the key physical properties are quite insensitive to the rate over the important 2–3 keV temperature range. The high-energy emissivity depends strongly on temperature, peaking at conditions corresponding to a closed shell system, and on the square of the electron density, as for a coronal system.},
doi = {10.1016/j.hedp.2011.08.001},
journal = {High Energy Density Physics},
number = 4,
volume = 7,
place = {United States},
year = {2011},
month = {8}
}

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