Atomic input for modeling ionic mixtures in astrophysical plasma

IF 2.6 3区 物理与天体物理 Q2 PHYSICS, NUCLEAR
S. Fritzsche
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引用次数: 0

Abstract

Accurate atomic data are known as a key ingredient for modeling the physical behavior of a wide range of plasma throughout the universe. When these data are combined with simulations of ionic mixtures, they (may) help infer the temperature, electron density, and ionization state of the plasma under non-ideal plasma conditions. We here report about an expansion of JAC, the Jena Atomic Calculator, in order to encourage the modeling of ionic mixtures and their thermodynamic properties under different plasma conditions. Whereas emphasis has first been placed upon simulations of ionic compositions in (ideal) local thermodynamic equilibrium, various features are prepared in this code to account for non-ideal conditions, such as plasma screening contributions, the ionization potential depression (IPD) or some non-classical statistics. To demonstrate these features of JAC, we have calculated the mean charge and charge-state distribution of a hot carbon plasma as well as some ionic mixture from the sun’s photosphere at selected temperatures T and mass densities \(\rho _m\). These computations show a significant shift in the mean charge distribution, if the IPD is incorporated by means of a Stewart–Pyatt plasma model. Since the JAC toolbox is based on Dirac’s relativistic equation, the present expansion of the code will facilitate also the treatment of ionic mixtures with medium and heavy elements as relevant for neutron-star mergers and elsewhere.

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来源期刊
The European Physical Journal A
The European Physical Journal A 物理-物理:核物理
CiteScore
5.00
自引率
18.50%
发文量
216
审稿时长
3-8 weeks
期刊介绍: Hadron Physics Hadron Structure Hadron Spectroscopy Hadronic and Electroweak Interactions of Hadrons Nonperturbative Approaches to QCD Phenomenological Approaches to Hadron Physics Nuclear and Quark Matter Heavy-Ion Collisions Phase Diagram of the Strong Interaction Hard Probes Quark-Gluon Plasma and Hadronic Matter Relativistic Transport and Hydrodynamics Compact Stars Nuclear Physics Nuclear Structure and Reactions Few-Body Systems Radioactive Beams Electroweak Interactions Nuclear Astrophysics Article Categories Letters (Open Access) Regular Articles New Tools and Techniques Reviews.
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