Effect of dense plasmas on exchange-energy shifts in highly charged ions: An alternative approach for arbitrary perturbation potentials

Journal Article · Thu Sep 15 04:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.84.032512· OSTI ID:22068697

Rosmej, F ^[1]; Bennadji, K ^[1]; Lisitsa, V S ^[2]

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1. Sorbonne Universites, Pierre et Marie Curie, UMR 7605, case 128, 4 place Jussieu, F-75252 Paris (France)
2. Russian Research Center Kurchatov, Laboratory of Radiation Theory, Kurchatov Square 1, 123182 Moscow (Russian Federation)

An alternative method of calculation of dense plasma effects on exchange-energy shifts {Delta}E{sub x} of highly charged ions is proposed which results in closed expressions for any plasma or perturbation potential. The method is based on a perturbation theory expansion for the inner atomic potential produced by charged plasma particles employing the Coulomb Green function method. This approach allows us to obtain analytic expressions and scaling laws with respect to the electron temperature T, density n{sub e}, and nuclear charge Z. To demonstrate the power of the present method, two specific models were considered in detail: the ion sphere model (ISM) and the Debye screening model (DSM). We demonstrate that analytical expressions can be obtained even for the finite temperature ISM. Calculations have been carried out for the singlet 1s2p{sup 1} P{sub 1} and triplet 1s2p{sup 3} P{sub 1} configurations of He-like ions with charge Z that can be observed in dense plasmas via the He-like resonance and intercombination lines. Finally we discuss recently available purely numerical calculations and experimental data.

• OSTI ID: 22068697
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 3 Vol. 84; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
74 ATOMIC AND MOLECULAR PHYSICS
ATOMIC NUMBER
DENSITY
DISTURBANCES
ELECTRON TEMPERATURE
GREEN FUNCTION
IONS
PERTURBATION THEORY
PLASMA
POTENTIALS
RESONANCE
SCALING LAWS
SCREENING
SPHERES
TRIPLETS