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Quantum Stark broadening of 3s–3p spectral lines in Li-like ions; Z-scaling and comparison with semi-classical perturbation theory

The European Physical Journal D volume 54, pages 51–64 (2009)Cite this article

Abstract

Quantum mechanical results for the electron impact Stark widths of the 3s–3p transitions in ten Li-like ions from C IV to P XIII are carried out. The atomic structure is obtained through a scaled Thomas-Fermi-Dirac-Amaldi potential (SST numerical code) with relativistic corrections. The distorted wave method is used for the calculation of the S-Matrix, and Feshbach resonances are included by means of the Gailitis method. A comparison with other theoretical and available experimental results is done. Except for Ne VIII, we find that the agreement between our quantum results and the experiments gets better when Z increases, which is not the case for the available close-coupling quantum ones. The behavior of the Stark width with the charge Z and the electron temperature Te is also studied and in contrast to previous studies, an improved agreement with experimental Z-scaling is obtained. We show that the relative difference between widths of the two fine structure lines of the same multiplet increases with Z from 0.5% for C IV to about 12% for P XIII, proving the increasing importance of fine structure effects. The importance of the Feshbach resonances is discussed and a comparison with available semi-classical perturbation results is given.

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Authors and Affiliations

  1. Groupe de Recherche en Physique Atomique et Astrophysique, Faculté des Sciences de Bizerte, Zarzouna, 7021, Tunisia

    H. Elabidi

  2. LERMA, Observatoire de Paris, CNRS, Université Pierre et Marie Curie, Place Jules Janssen, 92190, Meudon, France

    S. Sahal-Bréchot

  3. Groupe de Recherche en Physique Atomique et Astrophysique, INSAT, Centre Urbain Nord B.P. 676, 1080, Tunis, Tunisia

    N. Ben Nessib

Authors
  1. H. Elabidi
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  2. S. Sahal-Bréchot
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  3. N. Ben Nessib
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Correspondence to H. Elabidi.

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Elabidi, H., Sahal-Bréchot, S. & Ben Nessib, N. Quantum Stark broadening of 3s–3p spectral lines in Li-like ions; Z-scaling and comparison with semi-classical perturbation theory. Eur. Phys. J. D 54, 51–64 (2009). https://doi.org/10.1140/epjd/e2009-00167-8

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