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Title: A NEW GENERATION OF LOS ALAMOS OPACITY TABLES

Abstract

We present a new, publicly available set of Los Alamos OPLIB opacity tables for the elements hydrogen through zinc. Our tables are computed using the Los Alamos ATOMIC opacity and plasma modeling code, and make use of atomic structure calculations that use fine-structure detail for all the elements considered. Our equation of state model, known as ChemEOS, is based on the minimization of free energy in a chemical picture and appears to be a reasonable and robust approach to determining atomic state populations over a wide range of temperatures and densities. In this paper we discuss in detail the calculations that we have performed for the 30 elements considered, and present some comparisons of our monochromatic opacities with measurements and other opacity codes. We also use our new opacity tables in solar modeling calculations and compare and contrast such modeling with previous work.

Authors:
; ; ; ; ; ; ; ;  [1]
  1. Los Alamos National Laboratory, Los Alamos, NM 87545 (United States)
Publication Date:
OSTI Identifier:
22521629
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 817; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; A CODES; COMPARATIVE EVALUATIONS; COMPUTER CALCULATIONS; COMPUTERIZED SIMULATION; DENSITY; EQUATIONS OF STATE; FINE STRUCTURE; FREE ENERGY; HYDROGEN; LOS ALAMOS; MINIMIZATION; MONOCHROMATIC RADIATION; OPACITY; PLASMA; STAR MODELS; SUN; ZINC

Citation Formats

Colgan, J., Kilcrease, D. P., Magee, N. H., Sherrill, M. E., Abdallah, J. Jr., Hakel, P., Fontes, C. J., Guzik, J. A., and Mussack, K. A. A NEW GENERATION OF LOS ALAMOS OPACITY TABLES. United States: N. p., 2016. Web. doi:10.3847/0004-637X/817/2/116.
Colgan, J., Kilcrease, D. P., Magee, N. H., Sherrill, M. E., Abdallah, J. Jr., Hakel, P., Fontes, C. J., Guzik, J. A., & Mussack, K. A. A NEW GENERATION OF LOS ALAMOS OPACITY TABLES. United States. doi:10.3847/0004-637X/817/2/116.
Colgan, J., Kilcrease, D. P., Magee, N. H., Sherrill, M. E., Abdallah, J. Jr., Hakel, P., Fontes, C. J., Guzik, J. A., and Mussack, K. A. Mon . "A NEW GENERATION OF LOS ALAMOS OPACITY TABLES". United States. doi:10.3847/0004-637X/817/2/116.
@article{osti_22521629,
title = {A NEW GENERATION OF LOS ALAMOS OPACITY TABLES},
author = {Colgan, J. and Kilcrease, D. P. and Magee, N. H. and Sherrill, M. E. and Abdallah, J. Jr. and Hakel, P. and Fontes, C. J. and Guzik, J. A. and Mussack, K. A.},
abstractNote = {We present a new, publicly available set of Los Alamos OPLIB opacity tables for the elements hydrogen through zinc. Our tables are computed using the Los Alamos ATOMIC opacity and plasma modeling code, and make use of atomic structure calculations that use fine-structure detail for all the elements considered. Our equation of state model, known as ChemEOS, is based on the minimization of free energy in a chemical picture and appears to be a reasonable and robust approach to determining atomic state populations over a wide range of temperatures and densities. In this paper we discuss in detail the calculations that we have performed for the 30 elements considered, and present some comparisons of our monochromatic opacities with measurements and other opacity codes. We also use our new opacity tables in solar modeling calculations and compare and contrast such modeling with previous work.},
doi = {10.3847/0004-637X/817/2/116},
journal = {Astrophysical Journal},
issn = {0004-637X},
number = 2,
volume = 817,
place = {United States},
year = {2016},
month = {2}
}

Works referencing / citing this record:

Progress in Global Helioseismology: A New Light on the Solar Modeling Problem and Its Implications for Solar-Like Stars
journal, July 2019

  • Buldgen, Gaël; Salmon, Sébastien; Noels, Arlette
  • Frontiers in Astronomy and Space Sciences, Vol. 6
  • DOI: 10.3389/fspas.2019.00042