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Energy levels and multipole transition properties of C4+ ion in Debye plasmas

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Abstract

Plasma screening effects on the energy structure and radiative transition properties of helium-like C4+ ions embedded in Debye plasmas are investigated by using the multi-configuration Dirac-Hartree-Fock method incorporating the Debye-Hückel potential for both the electron-nucleus and electron-electron interactions. Seventeen fine-structure energy levels of the low-lying 1s 2, 1s2l(l = s,p) and 1s3l′(l′ = s,p,d) configurations, as well as the electric-dipole (E1), magnetic-dipole (M1) and magnetic-quadrupole (M2) transition probabilities and oscillator strengths between these levels have been calculated over a wide range of screening parameters. It is found that the plasma screening leads to a decrease of excitation energies and alters the energy levels remarkably. For Δn ≠ 0 transitions, the spontaneous decay spectra are red-shifted and their oscillator strengths and transition probabilities decrease with increasing the interaction screening, while those for the Δn = 0 transitions exhibit opposite patterns. The influence of electron-nucleus and electron-electron screened interactions on the changes of energy levels and transition properties are analyzed. Comparison is made of present results with other data available in the literature for this ion.

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Authors and Affiliations

  1. Institute of Applied Physics and Computational Mathematics, The Key Laboratory of Computational Physics, P.O. Box 8009-26, Beijing, 100088, P.R. China

    L. Y. Xie & J. G. Wang

  2. Key Laboratory of Atomic and Molecular Physics & Functional Materials of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou, 730070, P.R. China

    L. Y. Xie & C. Z. Dong

  3. Macedonian Academy of Sciences and Arts, P.O. Box 428, 1000, Skopje, Macedonia

    R. K. Janev

  4. College of Physical Sciences, Graduate School of the Chinese Academy of Sciences, P.O. Box 4588, Beijing, 100049, P.R. China

    Y. Z. Qu

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  1. L. Y. Xie
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  2. J. G. Wang
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Xie, L.Y., Wang, J.G., Janev, R.K. et al. Energy levels and multipole transition properties of C4+ ion in Debye plasmas. Eur. Phys. J. D 66, 125 (2012). https://doi.org/10.1140/epjd/e2012-20594-6

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