Satellite lines of helium-like ions in strongly coupled plasma environment

Abstract We report the transition energies and probabilities of satellite lines due to 2 p 2 ( 3 P 0 , 1 , 2 ) → 1 s 2 p ( 3 P 0 , 1 , 2 ) transitions of He-like C , N e , A l and A r ions embedded in strongly coupled plasma (SCP) environment. The SCP environment is represented by the ion-sphere (IS) model and the IS radius is varied in such a way that plasma electron densities ( ∼ 10 20 − 10 26 per c m 3 ) cover a wide range of experimental interest. Both relativistic and non-relativistic energies of 2 p 2 ( 3 P ) and 1 s 2 p ( 3 P ) states are reported. The relativistic MCDF results are obtained by modified GRASP2K code and the non-relativistic variational results are done by using explicitly correlated Hylleraas basis. The relativistic results are in good agreement with experimental data available in literature. The positions of intercombination lines in presence of dense plasma can be calculated from present results which are comparable with experimental measurements. The partial pressures experienced by the plasma-embedded ions are analyzed in the purview of available experimental observations. An empirical relation is reported to estimate partial pressure on ions in dense plasma environment.