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Title: Influence of the electronic energy level broadening on the ionization of atoms in hot and dense plasmas: An average atom model demonstration

Abstract

The broadening of the electronic energy levels of atoms and ions in hot and dense plasmas is taken to be an energy band with a Gaussian distribution of the density of states, which is normalized to ensure that the integration of the density of state over one band is equal to the statistical weight of the corresponding atomic level. The distribution of the bound electrons among the energy bands is determined by the continuum Fermi-Dirac distribution. Within a self-consistent field average atom approach, it has been shown that explicit considerations for the electronic energy level broadening have significant effects on the ionization of the atoms in hot and dense plasmas. The instability of the pressure induced electronic ionization with density, which occurs often in a normal average atom model and is avoided usually by introducing pseudoshape resonance states, disappears naturally. As examples, the density dependence of the average ionization of Al and Au at 1, 10, 100, and 1000 eV are presented.

Authors:
; ;  [1]
  1. Department of Physics, National University of Defense Technology, Changsha 410073 (China)
Publication Date:
OSTI Identifier:
20860263
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 13; Journal Issue: 9; Other Information: DOI: 10.1063/1.2338023; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ALUMINIUM; ATOMS; DISTRIBUTION; ELECTRONS; ENERGY LEVELS; EV RANGE; GAUSS FUNCTION; GOLD; IONIZATION; IONS; PLASMA; PLASMA DENSITY; PLASMA INSTABILITY; SELF-CONSISTENT FIELD

Citation Formats

Yong, Hou, Fengtao, Jin, and Jianmin, Yuan. Influence of the electronic energy level broadening on the ionization of atoms in hot and dense plasmas: An average atom model demonstration. United States: N. p., 2006. Web. doi:10.1063/1.2338023.
Yong, Hou, Fengtao, Jin, & Jianmin, Yuan. Influence of the electronic energy level broadening on the ionization of atoms in hot and dense plasmas: An average atom model demonstration. United States. doi:10.1063/1.2338023.
Yong, Hou, Fengtao, Jin, and Jianmin, Yuan. Fri . "Influence of the electronic energy level broadening on the ionization of atoms in hot and dense plasmas: An average atom model demonstration". United States. doi:10.1063/1.2338023.
@article{osti_20860263,
title = {Influence of the electronic energy level broadening on the ionization of atoms in hot and dense plasmas: An average atom model demonstration},
author = {Yong, Hou and Fengtao, Jin and Jianmin, Yuan},
abstractNote = {The broadening of the electronic energy levels of atoms and ions in hot and dense plasmas is taken to be an energy band with a Gaussian distribution of the density of states, which is normalized to ensure that the integration of the density of state over one band is equal to the statistical weight of the corresponding atomic level. The distribution of the bound electrons among the energy bands is determined by the continuum Fermi-Dirac distribution. Within a self-consistent field average atom approach, it has been shown that explicit considerations for the electronic energy level broadening have significant effects on the ionization of the atoms in hot and dense plasmas. The instability of the pressure induced electronic ionization with density, which occurs often in a normal average atom model and is avoided usually by introducing pseudoshape resonance states, disappears naturally. As examples, the density dependence of the average ionization of Al and Au at 1, 10, 100, and 1000 eV are presented.},
doi = {10.1063/1.2338023},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 9,
volume = 13,
place = {United States},
year = {2006},
month = {9}
}