A NEW GENERATION OF LOS ALAMOS OPACITY TABLES

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.

doi:10.3847/0004-637X/817/2/116

A NEW GENERATION OF LOS ALAMOS OPACITY TABLES

Journal Article · Mon Feb 01 04:00:00 EST 2016 · Astrophysical Journal

DOI:https://doi.org/10.3847/0004-637X/817/2/116· OSTI ID:22521629

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. ^[1]

Los Alamos National Laboratory, Los Alamos, NM 87545 (United States)

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.

OSTI ID:: 22521629

Journal Information:: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 2 Vol. 817; ISSN ASJOAB; ISSN 0004-637X

Country of Publication:: United States

Language:: English

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79 ASTRONOMY AND ASTROPHYSICS
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COMPUTERIZED SIMULATION
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FREE ENERGY
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MINIMIZATION
MONOCHROMATIC RADIATION
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A NEW GENERATION OF LOS ALAMOS OPACITY TABLES

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