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Title: Fe xvii Opacity at Solar Interior Conditions

Abstract

A recent study of Fe xvii R-matrix calculations aimed at resolving outstanding opacity problems claimed that substantial photon absorption from atomic core ionization processes was not previously considered. It is shown, however, that major opacity models already include cross-sections that are equivalent to the enhancements reported by the R-matrix method. Furthermore, the R-matrix calculations neglected important cross-sections that help to explain why the resultant opacity is lower than other models in the spectral range measured in transmission experiments relevant to the solar interior.

Authors:
 [1];  [2]
  1. Lawrence Livermore National Laboratories, 7000 East Avenue, Livermore, CA 94550 (United States)
  2. Sandia National Laboratories, 1515 Eubank SE, Albuquerque, NM 87185 (United States)
Publication Date:
OSTI Identifier:
22663960
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 835; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ABSORPTION; CROSS SECTIONS; EVOLUTION; IONIZATION; IRON; OPACITY; PHOTONS; PLASMA; R MATRIX; SUN; TRANSMISSION

Citation Formats

Iglesias, Carlos A., and Hansen, Stephanie B., E-mail: iglesias1@llnl.gov. Fe xvii Opacity at Solar Interior Conditions. United States: N. p., 2017. Web. doi:10.3847/1538-4357/835/2/284.
Iglesias, Carlos A., & Hansen, Stephanie B., E-mail: iglesias1@llnl.gov. Fe xvii Opacity at Solar Interior Conditions. United States. doi:10.3847/1538-4357/835/2/284.
Iglesias, Carlos A., and Hansen, Stephanie B., E-mail: iglesias1@llnl.gov. Wed . "Fe xvii Opacity at Solar Interior Conditions". United States. doi:10.3847/1538-4357/835/2/284.
@article{osti_22663960,
title = {Fe xvii Opacity at Solar Interior Conditions},
author = {Iglesias, Carlos A. and Hansen, Stephanie B., E-mail: iglesias1@llnl.gov},
abstractNote = {A recent study of Fe xvii R-matrix calculations aimed at resolving outstanding opacity problems claimed that substantial photon absorption from atomic core ionization processes was not previously considered. It is shown, however, that major opacity models already include cross-sections that are equivalent to the enhancements reported by the R-matrix method. Furthermore, the R-matrix calculations neglected important cross-sections that help to explain why the resultant opacity is lower than other models in the spectral range measured in transmission experiments relevant to the solar interior.},
doi = {10.3847/1538-4357/835/2/284},
journal = {Astrophysical Journal},
number = 2,
volume = 835,
place = {United States},
year = {Wed Feb 01 00:00:00 EST 2017},
month = {Wed Feb 01 00:00:00 EST 2017}
}