Electron affinity of the hydrogen atom and a resonance state of the hydrogen negative ion embedded in Debye plasmas

Kar, Sabyasachi; Ho, Yew Kam

doi:10.1088/1367-2630/7/1/141

Cited by 101 publications

(97 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For this case, results of the ground state energies are compared with those of other researchers, listed in Table 1. From Table 1, our results for each the Debye screening length λ D are in agreement with works of Zhao [25], Stubbins [26], Kar [15], and Winkler [5]. Ours results are also in agreement with the majority of Saha [18] about five to six significant figures.…”

Section: Resultssupporting

confidence: 90%

“…With the proposed method, The effects of the Debye shielding and confined boundary on the studied properties have been investigated in detail. For the case of R 0 = ∞, The ground energies have been compared with and are in agreement with most other authors [5,15,25,26]. Some of our results are in disagreement with those presented by Saha, the reliability of which is, in our opinion, doubtful The ground and some low-lying excited state energy levels, and oscillator strengths for confined hydrogen atom with difference Debye screening lengths λ D and difference confined radii R 0 have been studied.…”

Section: Discussionsupporting

confidence: 82%

See 1 more Smart Citation

The hydrogen atom confined in both Debye screening potential and impenetrable spherical box

Kang¹,

Yang

et al. 2013

Open Physics

View full text Add to dashboard Cite

Abstract:The ground state energy, some low-lying excited state energies and oscillator strengths for a hydrogen atom confined in both a Debye screening potential and finite impenetrable spherical box have been calculated. These have been calculated using a linear variational method based on B-spline basis functions. The results have been compared with those of other authors. The evaluated energies and oscillator strengths with respect to different plasma screening parameters with a certain confinement radii are discussed. PACS

show abstract

Section: Resultssupporting

confidence: 90%

Section: Discussionsupporting

confidence: 82%

The hydrogen atom confined in both Debye screening potential and impenetrable spherical box

Kang¹,

Yang

et al. 2013

Open Physics

View full text Add to dashboard Cite

show abstract

“…33,35 Kar and Ho 36,37 reported the resonance parameters of H À and He as functions of Debye length using exponential correlated wave functions within the framework of the stabilization method. Chakraborty and Ho 38,39 confirmed the results of Kar and Ho, 36,37 using the complex co-ordinate rotation method.…”

Section: Resultsmentioning

confidence: 99%

“…4, we compared our results with those obtained by Kar and Ho. 36,37 In this figure, we multiply the resonance energy, E r of H À by a factor 3p/2 and the resonance width, C of H À by a factor 3p/4 to set E r and C for He and H À within the same figure. It is clear from Fig.…”

Section: Resultsmentioning

confidence: 99%

“…4 that our calculated results are in agreement with those reported by Kar and Ho. 36,37 The coupling parameters in Maxwellian plasmas can be calculated in terms of the effective screening parameter l j by using the formula, 42 C j ¼ ½2:15 Â 10 2 Z Ã5=3 ðZ Ã þ 1Þ=fðl À1 j ZÞ 2 ½nð10 20 cm À3 Þ 2=3 g; (8) or C j ¼ ½6:3Z Ã5=3 ðZ Ã þ 1Þ 1=3 =fðl À1 j ZÞ 2=3 ½TðeVÞ 2=3 g; where Z Ã denotes the effective charge, n and T are the number density of the plasma electrons and temperature, respectively. In the thermal Maxwellian plasmas, the effective screening parameter l j can be written as…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Doubly excited states of the hydrogen negative ion and helium atom in astrophysical plasmas

2013

Self Cite

View full text Add to dashboard Cite

The nonthermal effects on the doubly excited resonance states of the hydrogen negative ion and helium atom are investigated in Lorentzian astrophysical plasma environments using highly correlated Hylleraas-type wave functions in the framework of the stabilization method. Resonance parameters (resonance position and width) are reported for the first time as functions of the spectral index and plasma parameter. The screening effects are more pronounced in the stronger screening region. V C 2013 American Institute of Physics. [http://dx.

show abstract

Structural properties of Li atom under quantum and classical plasmas: A composite variational framework

Mondal

Nayek²,

Saha

2021

Contributions to Plasma Physics

View full text Add to dashboard Cite

Structural properties of 1s 2 nl ( 2 L) [n = 2-5, l = 0-4; where, n and l are the principal quantum number and orbital angular momentum quantum number, respectively] states of Li atom embedded in classical weakly coupled plasma (WCP) and dense quantum plasma (DQP) have been discussed.The Debye-Hückel potential or the screened-Coulomb potential (SCP) and exponential-cosine-screened Coulomb potential (ECSCP) have been used to mimic the WCP and DQP, respectively. Li atom has been treated as a composite system with a frozen core Li + ion and a chemically active valence electron. The Rayleigh-Ritz variational method with Hylleraas-type basis set has been used to estimate the energy eigenvalue of 1s 2 ( 1 S) state of Li + ion core and a pure exponential basis has been considered to compute the energy of nl ( 2 L) states of the valence electron of Li atom. The influence of ECSCP and SCP on the radial probability distribution of the valence electron of the Li atom has also been studied. K E Y W O R D Sclasscial plasma, lithium atom, quantum plasma, ritz variational method, structural properties INTRODUCTIONThe studies on atomic processes in plasmas are gaining momentum over the years with the gradual development of the experimental facilities to have controlled laboratory plasma with homogeneous temperature and density. The availability of the astrophysical data from stellar and interstellar surroundings e.g. stars, interstellar gas, solar corona, solar wind, gaseous nebulae, cometary tails, rings of Saturn etc. adds as another reason for such investigations. Extensive review articles on the progress of such investigations are now available in the literature. [1,2] Based on the different plasma parameters, plasmas are classified into numerous types. The screened Coulomb potential or Debye-Hückel potential [3] defined asis used to mimic classical weakly coupled plasma (WCP). The plasma screening parameter depends on the plasma particle charge (q), plasma density (n e ), and plasma temperature (T) as follows-= √4 n e q 2 K B T , where K B is the Boltzmann constant. In case of WCP, the plasma temperature (T) is very high whereas the plasma density (n e ) is very low. The

show abstract

Electron affinity of the hydrogen atom and a resonance state of the hydrogen negative ion embedded in Debye plasmas

Cited by 101 publications

References 26 publications

The hydrogen atom confined in both Debye screening potential and impenetrable spherical box

The hydrogen atom confined in both Debye screening potential and impenetrable spherical box

Doubly excited states of the hydrogen negative ion and helium atom in astrophysical plasmas

Structural properties of Li atom under quantum and classical plasmas: A composite variational framework

Contact Info

Product

Resources

About