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Sorge, S.; Wierling, A.; Röpke, G.; Theobald, W.; Sauerbrey, R.; Wilhein, Thomas

doi:10.1088/0953-4075/33/16/304

Cited by 52 publications

(36 citation statements)

References 44 publications

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“…A further property caused by the surrounding dense plasma is the asymmetry of the line shape [42]. Spectra of hydrogenlike carbon ions [43] and neutral helium atoms [44,45] have been calculated and compared with MD simulations of the electrical field and with experimental data.…”

Section: Influence Of Bound States On Response Propertiesmentioning

confidence: 99%

Bound State Formation and Optical Properties of Partially Ionized Dense Plasmas

Röpke

Reinholz

NEIßNER

et al. 2005

Contrib. Plasma Phys.

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Key words Dense plasmas, dielectric function, dynamic structure factor, Mott effect, metal-nonmetal transition. PACS 52.25Mq, 52.27Gr, 52.27Lw, 52.38DxLinear response theory is used to describe the response of a charged particle system to external electromagnetic fields. Properties such as the polarization function, the dynamical conductivity and the absorption coefficient are expressed in terms of equilibrium correlation functions. Many-particle theory is used to treat correlations in the Coulomb system. The systematic inclusion of bound states is shown. Modifications due to the influence of a dense medium lead to the dissolution (Mott effect) of bound states, which is adequately described in terms of the single-particle spectral function.

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Section: Influence Of Bound States On Response Propertiesmentioning

confidence: 99%

Bound State Formation and Optical Properties of Partially Ionized Dense Plasmas

Röpke

Reinholz

NEIßNER

et al. 2005

Contrib. Plasma Phys.

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“…The approach has been used before to hydrogen and hydrogen-like ionic spectral lines [57,63]. In the present work, this approach has been extended successfully to the helium atom, applied for the electron density range of (10 16 − 10 18 ) cm −3 and temperature range of (1 − 6) × 10 4 K.…”

Section: Discussionmentioning

confidence: 99%

“…The perturber-radiator interaction leads to a pressure broadening (Stark broadening), which contains an electronic and an ionic contribution. Describing the ionic contribution in the quasi-static approximation by averaging over the ionic microfield [47,57,63], we get…”

Section: Theory Of Spectral Lines In Dense Plasmasmentioning

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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“…It has been applied to hydrogen, helium and hydrogen-like ions, e.g. the analysis of C 5+ in a laser-produced carbon plasma [11]. Most recently, we presented results for hydrogen-like lithium (Li 2+ ) Lyman lines emitted from a laser-produced Li plasma in Ref.…”

Section: Introductionmentioning

confidence: 99%

Improved Self‐Energy Calculations for Pressure Broadening of Spectral Lines in Dense Plasmas

Lorenzen

Wierling

Reinholz

et al. 2011

Contrib. Plasma Phys.

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Pressure broadening of Lyman-lines of hydrogen-like lithium (Li 2+ ) has been studied using a quantum statistical approach to the line shape in dense plasmas, for details see [1]. In this communication, we concentrate on the electronic self-energy, which is a basic input to the theory of spectral line profiles. We discuss the effect of strong, i.e. close, collisions which have been neglected so far for Li 2+ plasmas, but play generally an important role in dense plasmas, as has been shown in [2]. We present a method to calculate an improved electronic self-energy including strong collisions based on a two-body T-matrix and an effective optical potential. The method is tested for level broadening of the ground state of hydrogen.

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Untitled

Cited by 52 publications

References 44 publications

Bound State Formation and Optical Properties of Partially Ionized Dense Plasmas

Bound State Formation and Optical Properties of Partially Ionized Dense Plasmas

Neutral helium spectral lines in dense plasmas

Improved Self‐Energy Calculations for Pressure Broadening of Spectral Lines in Dense Plasmas

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