Relativistic atomic structure calculations and study of plasma parameters for Na-like Se XXIV

Abstract

Extensive calculations of energy levels and radiative data such as transition wavelengths, radiative rates, oscillator strengths, and line strengths for electric dipole (E1) transitions have been performed for Se XXIV using the multiconfiguration Dirac–Fock method. For other types of transitions, namely, magnetic dipole (M1), electric quadrupole (E2), and magnetic quadrupole (M2), only the radiative rates (A) are listed. The importance and effect of valence-valence and core-valence correlations on the excitation energies have been studied. For additional accuracy assessments, analogous calculations have been carried out by employing the flexible atomic code and configuration interaction technique. Comparisons are made with the available experimental and theoretical data in the literature. Close agreement has been found ensuring the accuracy and reliability of our results. The effect of plasma temperature on the line intensity ratio, electron density, plasma frequency, and skin depth has been analyzed for hot dense plasma (HDP) in local thermodynamic equilibrium. The present work might be beneficial in the modeling and characterization of HDP.

Effect of Dense Plasma Environment on the Spectroscopic Properties of He-like Ca18+ Ion

“…The fully relativistic MCDF method, revised by Norrington [21] and formerly developed by Grant et al [22] has been employed in our calculations. This method has also been successfully employed in our previous works [23][24][25]. In order to consider the influence of plasma environment on the spectral properties, the Dirac-Coulomb Hamiltonian containing all the dominant interactions can be written as…”