Hydrogen atoms in Debye plasma environments

Paul, Stephen; Ho, Y. K.

doi:10.1063/1.3152602

Cited by 77 publications

(34 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Its accuracy has been checked in earlier calculations. 17,18,21,89 It has been found that the eigen energies corresponding to this wave function are very close to the corresponding most accurate eigen energies computed by using the Slater-type orbital 90…”

Section: Resultsmentioning

confidence: 59%

Positron scattering from hydrogen atom embedded in weakly coupled plasma

2013

View full text Add to dashboard Cite

The positron-hydrogen collision problem in weakly coupled plasma environment has been investigated by applying a formulation of the three-body collision problem in the form of coupled multi-channel two-body Lippmann-Schwinger equations. The interactions among the charged particles in the plasma have been represented by Debye-Huckel potentials. A simple variational hydrogenic wave function has been employed to calculate the partial-wave scattering amplitude. Plasma screening effects on various possible mode of fragmentation of the system e þ þ Hð1sÞ during the collision, such as 1s ! 1s and 2s ! 2s elastic collisions, 1s ! 2s excitation, positronium formation, elastic proton-positronium collisions, have been reported. Furthermore, a detailed study has been made on differential and total cross sections of the above processes in the energy range 13.6-350 eV of the incident positron. V C 2013 American Institute of Physics.

show abstract

Section: Resultsmentioning

confidence: 59%

Positron scattering from hydrogen atom embedded in weakly coupled plasma

2013

View full text Add to dashboard Cite

show abstract

“…-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

View full text Add to dashboard Cite

-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

show abstract

“…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

View full text Add to dashboard Cite

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.

show abstract

Hydrogen atoms in Debye plasma environments

Cited by 77 publications

References 44 publications

Positron scattering from hydrogen atom embedded in weakly coupled plasma

Positron scattering from hydrogen atom embedded in weakly coupled plasma

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

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

Contact Info

Product

Resources

About