Influence of Dense Plasma Environment on the He-α and He-β Transitions of Cl15+ Ion

Abstract

AbstractThe effect of plasma shielding on the He-α 1s2 1S0 → 1s2p (3 \({\rm{P}}_{1}^{{\rm{o}}}\), 1 \({\rm{P}}_{1}^{{\rm{o}}}\)) and He-β 1s2 1S0 → 1s3p (3 \({\rm{P}}_{1}^{{\rm{o}}}\), 1 \({\rm{P}}_{1}^{{\rm{o}}}\)) transitions of Cl15+ ion embedded in warm-dense plasma environment is investigated. The analytical plasma screening potential of Li et al. [Phys. Plasmas 26, 033,301 (2019)] and uniform electron gas model potential have been incorporated within the multiconfiguration Dirac–Fock method and relativistic configuration interaction technique. It is seen that the excitation energies for the above transitions are red shifted with increasing free electron densities. At lower values of electron temperature, the plasma energy shift becomes more sensitive to the free electron density. The variation in weighted oscillator strengths ratio with plasma densities has also been analyzed. The presently reported results will be of great help in the modelling and diagnostics of laboratory and astrophysical plasmas.