Level shifts and inelastic electron scattering in dense plasmas

Davis, J.; Bláha, M.

doi:10.1016/0022-4073(82)90122-4

Cited by 57 publications

(12 citation statements)

References 7 publications

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“…We will show that by varying the two key parameters (i.e., D and A) under DH approximations, we are able to obtain the redshift of the Lyman-α line of H-like Al 12+ that is consistent with the only experimentally observed value [1]. Our results are also consistent with simulated redshifts for the Lyman-α line of H-like Ne 9+ derived from the earlier in-depth studies [8,12]. A conclusion of our study will be presented in Sec.…”

Section: Introductionsupporting

confidence: 84%

“…The results of the current investigation are compared in Fig. 4 with the earlier simulated data from two quantum mechanical approaches, i.e., the QMIT by Nguyen et al [8] and the one by Davis and Blaha [12]. In particular, the QMIT suggested a linear dependence of the redshifts as functions of density at fixed electron energy (see Eq.…”

Section: Resultsmentioning

confidence: 60%

“…Interestingly, we find that the existing experimental works on atomic spectra from laser-produced high-density plasma happen to be those within this range of Z, i.e., H-like Al 12+ [1], C 5+ [2,3], and Ar 17+ [4]. In addition, the Lyman lines for H-like Ne 9+ were also investigated in great detail by more elaborate simulation schemes, which take into account the ion polarization effect [8,12,13]. In particular, Nguyen et al [8], based on a quantum mechanical impact theory (QMIT), have estimated the Lyman-α redshift (or polarization line shift) of H-like Ne 9+ to be 20% greater than an earlier quantum mechanical treatment by Davis and Blaha [12] (which takes into account only partially the effect of the ion charge density).…”

Section: Introductionmentioning

confidence: 93%

“…In addition, the Lyman lines for H-like Ne 9+ were also investigated in great detail by more elaborate simulation schemes, which take into account the ion polarization effect [8,12,13]. In particular, Nguyen et al [8], based on a quantum mechanical impact theory (QMIT), have estimated the Lyman-α redshift (or polarization line shift) of H-like Ne 9+ to be 20% greater than an earlier quantum mechanical treatment by Davis and Blaha [12] (which takes into account only partially the effect of the ion charge density). This difference, as pointed out by Nguyen et al, comes essentially from the negative contribution by ions.…”

Section: Introductionmentioning

confidence: 99%

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Redshift of the Lyman-αemission line of H-like ions in a plasma environment

2015

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We present a critical assessment of the applicability of the Debye-Hückel (DH) approximation to the redshift of the Lyman-α emission line of the H-like ions under a dense plasma environment. By carefully considering the 2p → 1s transition spatially and temporally, our investigation suggests that the DH approximation may be applied to a limited number of H-like ions, such as the ones with Z between 5 and 18 or with Z greater than 50. Our numerical calculation, in fact, leads to quantitative agreement with the observed redshift of the well-isolated Lyman-α line at plasma density of the order of 1 × 10 22 cm −3 or higher with an electron temperature of several hundred eV of H-like Al 12+. Our study also yields simulated data consistent with those from more elaborate quantum mechanical approaches.

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Section: Introductionsupporting

confidence: 84%

Section: Resultsmentioning

confidence: 60%

Section: Introductionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

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Redshift of the Lyman-αemission line of H-like ions in a plasma environment

2015

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“…When the density is so high that the mean ionic volume is of the order of a few Bohr radii, Saha equation breaks down and models must be refined to take into account density effects like pressure ionization. Current models include free energy minimization (Graboske et al 1969, Dappen 1980, Dappen et al 1987 and average-atom approaches (Rozsnyai 1975, Feng et al 1981, Davis and Blaha 1982. The first one leaves the bound states essentially unperturbed.…”

Section: Introductionmentioning

confidence: 99%

Calculation of Ionization Equilibrium for Dense Plasmas

Massacrier

1993

International Astronomical Union Colloquium

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Development of various methods to the investigation of the spectral properties and collision dynamics of H‐like ions taking place in dense and hot plasma environments

Chen

Liu

Sun

et al. 2021

Int J of Quantum Chemistry

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The correct understanding of the behavior of highly stripped ions immersed in a dense plasma environment is a hitherto challenge for theory and it is of importance in various applications. Here, we developed four kinds of novel theoretical models to the determination of the spectral properties and collision dynamics of H-like ions in dense and hot plasmas by employing the analytical potential [Li et al., Phys. Plasmas 2019, 26, 033301] to describe the interactions among the charged particles: (i) The electron photon processes in plasma model within the relativistic scheme; (ii) The multiconfiguration Dirac-Fock model within the framework of relativistic self-consistent iteration approximation; (iii) The generalized pseudospectral method within the relativistic framework; and (iv) An analytic formula based on the Hartree-Fock method and the irreducible tensor theory within the non-relativistic regime, derived from a solution of Schrödinger equation. As a typical example, energy eigenvalues, radiative transition properties, spectral line shifts, and electron impact excitation and ionization cross sections of the selected N 6+ and Ne 9+ ions are determined for several temperature-density cases, characteristic of inertial confinement fusion plasmas. A comparison of these results with each other and the results from earlier calculations as well as with the available experimental data is provided. Systematic trend is determined for all the Zhan-Bin Chen and Peng-Fei Liu contributed equally to this study.

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Level shifts and inelastic electron scattering in dense plasmas

Cited by 57 publications

References 7 publications

Redshift of the Lyman-αemission line of H-like ions in a plasma environment

Redshift of the Lyman-αemission line of H-like ions in a plasma environment

Calculation of Ionization Equilibrium for Dense Plasmas

Development of various methods to the investigation of the spectral properties and collision dynamics of H‐like ions taking place in dense and hot plasma environments

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