Abstract
New relativistic approach to computing the spectral parameters of multicharged ions in plasmas for different values of the plasmas screening (Debye) parameter (respectively, electron density, temperature) is presented. The presented approach is based on the generalized relativistic energy approach combined with the optimized relativistic many-body perturbation theory with the Dirac-Debye screening hamiltonian as a zeroth approximation, adapted for application to study the energy and spectral parameters of atoms and ions in plasmas. The special exchange potential as well as the electron density with dependence upon the temperature are used. The wavelengths for a number of transitions, including (A): E(1s2p 1P1)-E(1s2 1S); (B) E(1s3p 1P1)_E(1s2 1S); (C)AK: E(1s2p 3P1)_E(1s2s 3S); (D): E(1s3p 3P1)_E(1s2s 3S) of the helium in plasmas for various Debye lengths are calculated and compared with the corresponding data by Kar-Ho.
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