Quadrupole Oscillator Strengths of Helium Interacting with Debye Potentials

Jiang, Peng; Kar, Sabyasachi

doi:10.1007/s00601-012-0504-1

Cited by 8 publications

(3 citation statements)

References 40 publications

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“…The effects of plasma environments on the transition energies, oscillator strengths, polarizabilities and hyperpolarizabilities of different atoms such as helium, lithium and sodium have been reported recently [38][39][40]. In the present work, a spherically confined hydrogen atom embedded in dense quantum plasma characterized by ECSCP is considered and the energy spectra, dipole matrix elements, and oscillator strengths for the system have been determined.…”

Section: Introductionmentioning

confidence: 96%

Intense field induced excitation and ionization of an atom confined in a dense quantum plasma

2015

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Exponential cosine screened Coulomb potential (ECSCP) has been widely used in various branches of physics e.g., solid-state physics, nuclear physics and plasma physics. The atomic photoionization processes under plasma shielding can serve as an efficient tool for study of plasma properties in various environments ranging from nano-scale devices to astrophysical objects. In the present study, ECSCP has been used to characterize a dense quantum plasma and its effect on the spectrum of an atom encaged in a spherical box has been investigated. The work has further been extended to study the response of such a system to a periodic laser field. Photoexcitation and ionization probabilities of the system have been studied as a function of applied laser field parameters using the non-perturbative Floquet technique. As the Floquet method requires exact energy values and oscillator strengths, the spectrum of confined system has been calculated using Bernstein-polynomial method. The variation of energy spectrum and oscillator strengths with screening as well as confinement parameters has also been explored.

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Section: Introductionmentioning

confidence: 96%

Intense field induced excitation and ionization of an atom confined in a dense quantum plasma

2015

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“…In molecular physics, many interacting potentials have been used, one of which is Morse potential [38]. In low-density thermal plasmas, the screened interaction between the plasma particles can be modeled by the standard Debye-Hückel potential [39][40][41][42]. In dense quantum plasmas, the interacting potential can be modeled by an exponential cosine screened Coulomb potential (ECSCP) [24,[43][44][45][46][47][48][49][50].…”

Section: ( ( ))mentioning

confidence: 99%

Rényi, Fisher, Shannon, and their electron correlation tools for two-electron series

2020

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Information entropies, such as Rényi, Fisher, and Shannon, are calculated for the 1s2-state of the two-electron series, in position space. It is considered that the exponential cosine screened Coulomb potential (ECSCP) describes the medium. Explicit correlated Hylleraas functions with 3-parameter are used to focus on getting the most distinctive physical features of the inter-electronic repulsion results. In one- and two-electron charge densities, the numerical values of the information entropies and their ratios are calculated. Fisher-Shannon, and Fisher-Rényi information products that measure the electron-electron correlation strength, are calculated and discussed. Also, we used the contour maps and 3D-graphs to visualize how the interplay between inter-electronic repulsion and electrons-nuclear charge interaction determines the variation of information entropies as a function of the nuclear charge and the screening parameter. In this work, an expression for the divergence in Hylleraas coordinates has been derived and the results of the information quantities for two-electron systems with ECSCP have been calculated, in one-and two-electron densities, for the first time.

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“…Recently we have investigated the plasma screening effects on the static multipole polarizabilities [1] and dynamic dipole polarizabilities [2] of Li and Na atoms within the framework of Debye shielding approach of plasma modeling using the symplectic algorithm. Plasma screening effects on the atomic processes based on the Debye model have gained tremendous attention in the recent years [3][4][5][6][7][8][9][10][11][12]. In this work, we investigate the dynamic quadrupole and octupole polarizabilities of Li and * E-mail: skar@hit.edu.cn Na atoms embedded in Debye plasma environments.…”

Section: Introductionmentioning

confidence: 99%

Dynamic multipole polarizabilities of Li and Na atoms interacting with Debye potentials

Kar

Li²,

Shen

2013

Open Physics

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Quadrupole Oscillator Strengths of Helium Interacting with Debye Potentials

Cited by 8 publications

References 40 publications

Intense field induced excitation and ionization of an atom confined in a dense quantum plasma

Intense field induced excitation and ionization of an atom confined in a dense quantum plasma

Rényi, Fisher, Shannon, and their electron correlation tools for two-electron series

Dynamic multipole polarizabilities of Li and Na atoms interacting with Debye potentials

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