Electric microfield distributions in electron-ion plasmas

Potekhin, A. Y.; Chabrier, G.; Gilles, D.

doi:10.1103/physreve.65.036412

Cited by 70 publications

(84 citation statements)

References 33 publications

(57 reference statements)

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“…The MDH88 and SCVH95 calculations are both being updated. One of the main improvements is in the way the occupation probability factors, w, are calculated in the Stark microfield (Potekhin, Chabrier, & Gilles 2002). SCVH95 consider only H-He mixtures, and thus their calculations are not suited to the study of seismic data.…”

Section: Resultsmentioning

confidence: 99%

Updated and Expanded OPAL Equation‐of‐State Tables: Implications for Helioseismology

Rogers

Nayfonov

2002

ApJ

904

777

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We are in the process of updating and extending the OPAL equation-of-state (EOS) and opacity data to include low-mass stars. The EOS part of that effort now is complete, and the results are described herein. The new data cover main-sequence stars having mass !0.1 M . As a result of the more extreme matter conditions encountered with low-mass stars, we have added new physics. The electrons are now treated as relativistic, and we have improved our treatment of molecules. We also consider the implications of the new results for helioseismology.

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Section: Resultsmentioning

confidence: 99%

Updated and Expanded OPAL Equation‐of‐State Tables: Implications for Helioseismology

Rogers

Nayfonov

2002

ApJ

904

777

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“…For H and He we use a screened microfield distribution (Potekhin et al 2002), but for all other elements we use an unscreened microfield distribution due to the prohibitive cost of the screened distribution computation for systems with large numbers of states.…”

Section: Eos Used In Opacity Calculationsmentioning

confidence: 99%

A New Generation of Los Alamos Opacity Tables

Colgan

Kilcrease

Magee

et al. 2016

ApJ

201

167

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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.

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“…They can be derived by an appropriate approach such as APEX [84,85] or Monte Carlo simulations [24] in the case of strongly coupled plasmas. At low densities (N e < 10 22 m −3 ) ion dynamics correction is required, while at high density the motion of the ions is not significant [30].…”

Section: Discussionmentioning

confidence: 99%

“…Furthermore, He-like spectral lines are a prominent feature in laser-generated plasmas [18][19][20][21][22]. In addition to this, a detailed analysis of the broadening and shift of helium spectral lines of dense plasmas can be used to test our understanding of correlation effects in these plasmas [23,24].…”

Section: Introductionmentioning

confidence: 99%

Neutral helium spectral lines in dense plasmas

et al. 2006

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Shift and broadening of isolated neutral helium lines 7281Å (2 1 P − 3 1 S), 7065Å (2 3 P − 3 3 S), 6678Å (2 1 P − 3 1 D), 5048Å (2 1 P − 4 1 S), 4922Å (2 1 P − 4 1 D) and 4713Å (2 3 P − 4 3 S) in a dense plasma are investigated. Based on a quantum statistical theory the electronic contributions to the shift and width are considered, using the method of thermodynamic Green functions. Dynamic screening of the electron-atom interaction is included. Compared to the width, the electronic shift is more affected by dynamical screening. This effect is increasing at high density. A cut-off procedure for strong collisions is used. The contribution of the ions is taken into account in a quasi-static approximation, with both the quadratic Stark effect and the quadrupole interaction included. The results for shift and width agree well with the available experimental and theoretical data.

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Electric microfield distributions in electron-ion plasmas

Cited by 70 publications

References 33 publications

Updated and Expanded OPAL Equation‐of‐State Tables: Implications for Helioseismology

Updated and Expanded OPAL Equation‐of‐State Tables: Implications for Helioseismology

A New Generation of Los Alamos Opacity Tables

Neutral helium spectral lines in dense plasmas

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