Atomic structure and line broadening of He-like ions in hot and dense plasmas

Kœnig, M.; Malnoult, Philippe; Nguyen, Hoai Thuong

doi:10.1103/physreva.38.2089

Cited by 46 publications

(23 citation statements)

References 33 publications

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“…Figure 5 demonstrates that the Doppler-corrected positions of the w and y lines shift to the red with the decreasing distance from the target surface, i.e., with the increasing electron density and the decreasing temperature of the plasma. The values of the observed shifts are comparable with predictions of the hydrodynamic modeling and the quantum mechanical impact theory [13].…”

Section: Plasma-induced Spectral Line Shiftssupporting

confidence: 86%

X-ray Spectroscopy of Hot Dense Plasmas: Experimental Limits, Line Shifts & Field Effects

Renner¹,

Sauvan²,

Dalimier³

et al. 2008

AIP Conference Proceedings

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Section: Plasma-induced Spectral Line Shiftssupporting

confidence: 86%

X-ray Spectroscopy of Hot Dense Plasmas: Experimental Limits, Line Shifts & Field Effects

Renner¹,

Sauvan²,

Dalimier³

et al. 2008

AIP Conference Proceedings

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“…A magnitude of the shift ∼19.6 eV at n e ∼ 6.0 × 10 24 cm −3 as obtained in the present calculation may be compared against the shift ∼17.4 eV at n e ∼ 6.0 × 10 24 cm −3 and the electron temperature T e ∼ 500 eV computed in Ref. [44], employing both the temperature-dependent selfconsistent field ion-sphere model and the quantum-mechanical impact methods. In addition, the calculation of α d (ω) enables us to obtain the absorption oscillator strength (in the length form expressed in a.u.)…”

Section: Resultssupporting

confidence: 58%

Dynamic polarizability of an atomic ion within a dense plasma

Basu

Ray

2011

Phys. Rev. E

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We analyze the influence of plasma electron density on frequency-dependent linear field-response behavior of an atomic ion embedded in a dense plasma medium. The frequency-dependent atomic response, characterized by the dynamic dipole polarizability α(d)(ω) as a function of the angular frequency ω of the time-dependent field, is estimated here up to the first pole of α(d)(ω) on the ω axis (corresponding to the lowest resonance transition 1s(2 1)S→1s2p(1)P) for the ground state 1s(2 1)S of a two-electron atomic ion Ne(8+) (Z = 10) at different plasma electron densities, as a typical example, employing the time-dependent coupled Hartree-Fock scheme within the framework of the ion-sphere model. It is observed that, owing to plasma density-induced enhancement of α(d)(ω) at every ω, the pole position of α(d)(ω) on the ω axis retracts toward the origin. This indicates a density-induced lowering (redshift) of the corresponding transition energy that conforms to experimentally observed trends. The polarizability calculation suggests a density-induced drop in the 1s(2 1)S→1s2p(1)P absorption oscillator strength in the atomic ion within dense plasmas.

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“…First, we have not considered line shifts due to electron collisions in this work. Several theoretical investigations [42,43] have pointed out the possibility of significant line shifts from this source. Since these predicted shifts differ for each line series member, uncertainties could be introduced in our case on the high-energy side of the Lyman-p line for conditions where the Lyman-p and Lyman-y lines significantly overlap.…”

Section: Resultsmentioning

confidence: 99%

Ion broadening of dense-plasma spectral lines including field-dependent atomic physics and the ion quadrupole interaction

1993

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We examine the theoretical line spectra from hydrogenlike argon in the electron-number-density range of 10 -10 cm and at a temperature corresponding to kT=800 eV. At these high densities it is important to address the relevance of higher-order plasma-ion microfield efFects on the spectral line shape. We begin by calculating spectral line shapes using electric-field-dependent matrix elements that are constructed from wave functions which are solutions of Schrodinger's equation for hydrogenic ions in a uniform field. This provides a suitable basis for including microfield spatial nonuniformities by considering the quadrupole term in the radiator-perturbing ion interaction. Field gradients are calculated in an approximation that takes ion-ion correlations into account. We examine the consequences of these effects as well as of mixing between the adjacent Stark manifold on the Lyman-a and Lyman-P lines of hydrogenlike argon. PACS number(s): 52.25.Nr, 32.70.Jz, 32.30.Rj (APEX) model of the plasma-ion microfield [15,16] thus also incorporating correlations among perturbing ions. This represents an improvement with respect to a previous treatment that only included correlations between the radiator and perturbing ions [6].The power emitted by dipole radiation from an emitter immersed in a plasma, as a function of the frequency, is given by [1,17]

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Atomic structure and line broadening of He-like ions in hot and dense plasmas

Cited by 46 publications

References 33 publications

X-ray Spectroscopy of Hot Dense Plasmas: Experimental Limits, Line Shifts & Field Effects

X-ray Spectroscopy of Hot Dense Plasmas: Experimental Limits, Line Shifts & Field Effects

Dynamic polarizability of an atomic ion within a dense plasma

Ion broadening of dense-plasma spectral lines including field-dependent atomic physics and the ion quadrupole interaction

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