Effect of dense plasma on the spectral properties of hydrogenic ions

Sil, A. N.; Saha, Biswajit; Mukherjee, P. K.

doi:10.1002/qua.20610

Cited by 19 publications

(18 citation statements)

References 34 publications

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“…-Energy level shifts of ions in dense plasmas have been found experimentally and theoretically for many decades [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. The reason for this phenomenon is related to the fact that the plasma shields the nuclear attraction of the bound electron that in turn shifts the energy level toward the continuum.…”

Section: Copyright C Epla 2012mentioning

confidence: 99%

Quantum-number–dependent energy level shifts of ions in dense plasmas: A generalized analytical approach

Li¹,

Rosmej²

2012

EPL

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-Dense plasma effects on bound energy levels have been studied with relativistic atomic structure simulations that include intermediate coupling and configuration interaction. A general analytical formula is proposed that predicts the energy of LSJ-split levels for wide conditions of density and finite temperature and any atomic element. The achieved precision of the analytical approach allowed even to describe energy level crossings and the breakdown of level degeneration induced by dense plasma effects. Finally, a further simplification of the proposed method is developed that requests only information on energy level energies and quantum numbers of isolated atoms that are readily available. Copyright c EPLA, 2012Introduction. -Energy level shifts of ions in dense plasmas have been found experimentally and theoretically for many decades [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. The reason for this phenomenon is related to the fact that the plasma shields the nuclear attraction of the bound electron that in turn shifts the energy level toward the continuum. As the overlap of the bound electron with the free electrons depends on the bound electron configurations, different shifts are encountered for upper and lower levels thereby inducing the so-called plasma polarization shift (PPS) [16].Although the PPS and some relations to the bound orbital quantum numbers have been indicated, no general rules could be established to predict plasma screening effects in dependence on the bound electron characteristics. To reveal such dependences is an urgent need in order to provide a clear picture about the plasma influence on the energy levels and in order to study the behavior of the spectral fine structure that is also at the origin of the spectral line shift [5,11].In this work the self-consistent field ion sphere model (SCFISM) [17][18][19][20] is used. Generally, two basic screening

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Section: Copyright C Epla 2012mentioning

confidence: 99%

Quantum-number–dependent energy level shifts of ions in dense plasmas: A generalized analytical approach

Li¹,

Rosmej²

2012

EPL

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“…In addition to evaluation of the ground state energies at different plasma coupling strengths we apply an external time dependent perturbation [21][22][23][24] for probing the low lying excited states of the system. The transition energies and excited state wave functions have been calculated using linear response theory under such a perturbation [21][22][23][24]. The procedure yields the spectral line positions and other excitation properties under the plasma environment.…”

Section: Theorymentioning

confidence: 99%

“…The procedural details have been given elsewhere [21][22][23][24]. The basis sets for the perturbed functions are similar to that given by equations (7) and (8) with different linear and non linear parameters.…”

Section: Theorymentioning

confidence: 99%

“…In addition we would also like to investigate the applicability of the Debye plasma model with a spherical confinement on the spectral line positions and shifts of the Lyman lines under the laser plasma experimental The European Physical Journal D conditions [10][11][12] and to estimate the shifts in ionization potentials. Such studies have been done earlier for hydrogen [21,22] and helium like systems [23,24] to understand the behavior of the structural properties of one and two electron systems under weak as well as strongly coupled plasmas. A brief outline of the theory is given in Section 2 and a discussion of the results follow in Section 3.…”

Section: Introductionmentioning

confidence: 99%

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Effect of strongly coupled plasma on the spectra of hydrogenlike carbon, aluminium and argon

Bhattacharyya¹,

Sil

Fritzsche

et al. 2007

Eur. Phys. J. D

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Abstract.A detailed study has been performed for estimating the orbital energies, positions and shifts of the Lyman lines of C 5+ , Al 12+ and Ar 17+ under strongly coupled plasma with a view to understand such line positions and shifts obtained in laser produced plasma experiments. The effect of strongly coupled plasma has been treated within the Ion Sphere (IS) model. Both non-relativistic and relativistic methods have been used for estimating the spectral properties. Theoretical estimates with IS model of the plasma are in conformity with the results of laser plasma experiments on these highly stripped ions. The experimental data for the systems have also been compared with the theoretical estimates using Debye screening model of the plasma with spatial confinements which gives additional restrictions to the wave functions at finite boundaries. PACS

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“…Study of the effect of external environment like that of a plasma on the energy levels and other structural properties of atomic, ionic and exotic systems has become a subject of extensive investigations in recent years [1][2][3][4][5][6][7][8][9][10][11][12]. A broad discussion on the subject matter was given by Griem [13], Fujimoto [14], Ichimaru [15] and Rajagopal [16].…”

Section: Introductionmentioning

confidence: 99%

The influence of Debye plasma on the ground state energies of exotic systems

Sil

Pawlak²,

Mukherjee

et al. 2008

Journal of Quantitative Spectroscopy and Radiative Transfer

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The effect of plasma environment on the ground state energies of exotic systems ppµ, ddµ and ttµ has been analyzed within a generalized three-body formalism using multi-term correlated basis sets. The Debye screening model of the plasma has been adopted for such a study. The binding energies of p with pµ, d with dµ and t with tµ have been estimated for a range of values of the Debye screening parameters. The systems tend towards instability for increased screening. The effect of particle correlation has been investigated in detail and is found to play important role for the stability in these systems.

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Effect of dense plasma on the spectral properties of hydrogenic ions

Cited by 19 publications

References 34 publications

Quantum-number–dependent energy level shifts of ions in dense plasmas: A generalized analytical approach

Quantum-number–dependent energy level shifts of ions in dense plasmas: A generalized analytical approach

Effect of strongly coupled plasma on the spectra of hydrogenlike carbon, aluminium and argon

The influence of Debye plasma on the ground state energies of exotic systems

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