Eur. Phys. J. D 55, 645-652 (2009)
https://doi.org/10.1140/epjd/e2009-00258-6

Spectra of heliumlike carbon, aluminium and argon under strongly coupled plasma

¹ Theoretische Chemie, Universität Heidelberg, Im Neuenheimer Feld 229, 69120 Heidelberg, Germany
² Institut für Elektrochemie, Universität Ulm, Albert-Einstein-Allee 47, 89069 Ulm, Germany
³ Gesellschaft für Schwerionenforschung Darmstadt, Planckstraße 1, 64291 Darmstadt, Germany
⁴ Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700 032, India
⁵ Ramakrishna Mission Vivekananda University, Belur Math, Howrah, West Bengal, 711 202, India
⁶ Institut für Physik, Universität Kassel, 34109 Kassel, Germany

Corresponding author: ^a profpkmukherjee@gmail.com

Received: 6 August 2009
Revised: 24 August 2009
Published online: 3 October 2009

Abstract

Spectral line positions for the highly stripped helium like carbon, aluminium and argon embedded in intense plasma environments have been calculated theoretically to compare with the existing data available from laser plasma experiments. The changes in the ionization potentials for such ions have been determined and the excitation energies, oscillator strengths and transition probabilities for the transitions 1s^{2 1}S → 1snp ¹P (n=2-5) have been evaluated for the diagnostic determination of such plasmas. The ion sphere (IS) model was used for estimating the effect of strongly coupled plasma on the ions within the non-relativistic as well as the relativistic framework. Time dependent perturbation theory has been applied for obtaining the linear response properties of the ions in the non-relativistic approximation. The effects of the plasma environment on such properties of the ions under the Debye screening model with suitable cut off radii have also been considered for comparing the data with those obtained from the IS model of the plasma.