The generalized oscillator strengths of hydrogenlike ions in Debye plasmas

Qi, Y. Y.; Wu, Yong; Wang, J. G.; Qu, Yi

doi:10.1063/1.3073675

Cited by 72 publications

(37 citation statements)

References 32 publications

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“…We have calculated the bound-bound transitions in hydrogenlike ions in Debye plasmas using the symplectic scheme, 19,20 and in this work we utilize the same method to calculate the energy levels and wave functions of Li atoms.…”

Section: A Energy Levels and Wave Functionsmentioning

confidence: 99%

Photoionization of Li and radiative recombination of Li+ in Debye plasmas

Wang

2009

Physics of Plasmas

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The photoionization cross sections in the photoelectron energy below 2 Ry are calculated for the ground and n≤4 excited states of Li embedded in plasma environments and the radiative-recombination (RR) rate coefficients for Li+ were presented for temperature T=100–32 000 K in a wide range of plasma parameters. The plasma screening interaction is described by the Debye–Hückel model and the energy levels and wave functions including both the bound and continuum states are calculated by solving the Schrödinger equation numerically in a symplectic integration scheme. The screening of Coulomb interactions remarkably changes the photoionization cross sections near the ionization threshold, and especially for the ns states, the Cooper minimum is uncovered and shifted to the higher energy as the screening interaction increases. The RR rate coefficients at low temperature have a complex variation on the Debye lengths; whereas at higher temperature the RR rate coefficients decrease with the increasing of screening effects. Comparison of present results with those of other authors when available is made.

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Section: A Energy Levels and Wave Functionsmentioning

confidence: 99%

Photoionization of Li and radiative recombination of Li+ in Debye plasmas

Wang

2009

Physics of Plasmas

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“…However, in the strongly coupled plasma (Γ ≫ 1 implying high density and low temperature) ion-sphere (IS) potential model [4] is the best suited model for accounting the plasma screening effects. Both the Debye and ion-sphere models have been successfully employed sev-eral times earlier to describe the electronic properties of different plasma embedded atomic systems [5][6][7][8][9][10][11]. The effect of nuclear charge screening by plasma free electrons is reciprocated in form of ionization potential depression (IPD) or continuum lowering [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Plasma screening effects on the electronic structure of multiply charged Al ions using Debye and ion-sphere models

2016

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We analyze atomic structures of plasma embedded aluminum (Al) atom and its ions in the weakly and strongly coupling regimes. The plasma screening effects in these atomic systems are accounted for using the Debye and ion sphere (IS) potentials for the weakly coupling and strongly coupling plasmas, respectively. Within the Debye model, special attention is given to investigate the spherical and non-spherical plasma-screening effects considering in the electron-electron interaction potential. The relativistic coupled-cluster (RCC) method has been employed to describe the relativistic and electronic correlation effects in the above atomic systems. The variation in the ionization potentials (IPs) and excitation energies (EEs) of the plasma embedded Al ions are presented. It is found that the atomic systems exhibit more stability when the exact screening effects are taken into account. It is also showed that in the presence of strongly coupled plasma environment, the highly ionized Al ions show blue and red shifts in the spectral lines of the transitions between the states with same and different principal quantum numbers, respectively. Comparison among the results obtained from the Debye and IS models are also carried out considering similar plasma conditions.

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“…Several authors have applied the FBA to calculate electron impact excitation of helium with no screening. 3,10 This method has been applied by authors [11][12][13] in the study of electron impact excitation of atomic hydrogen in a Debye plasma. The main purpose of this paper is the application of the FBA to electron impact excitation of the helium atom in Debye plasmas, which to the best of our knowledge is the first time this study has been conducted.…”

Section: Introductionmentioning

confidence: 99%

Electron impact excitation of helium in Debye plasma

et al. 2015

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The probability, differential, and integral scattering cross sections of the 11S→21S and 11S→21P transitions of helium have been calculated in the first Born approximation. The projectile-target interactions depending on the temperature and the density of plasma are described by the Debye-Hückel model. Wave functions of the target before and after collision were modeled by non orthogonal Hartree-Fock orbitals. The wave functions parameters are calculated with the Ritz variational method. We improve our unscreened first Born approximation integral cross sections by using the BE-scaled (B stands for binding energy and E excitation energy) method. The second Born approximation has also been used to calculate the excitation cross sections in Debye plasma. Our calculations are compared to other theoretical and experimental results where applicable.

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The generalized oscillator strengths of hydrogenlike ions in Debye plasmas

Cited by 72 publications

References 32 publications

Photoionization of Li and radiative recombination of Li+ in Debye plasmas

Photoionization of Li and radiative recombination of Li+ in Debye plasmas

Plasma screening effects on the electronic structure of multiply charged Al ions using Debye and ion-sphere models

Electron impact excitation of helium in Debye plasma

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