Strongly coupled plasma effect on excitation energies of O-like ions and photoionization of F-like ions

Abstract

The main goal of the present study is to analyze and estimate the plasma screening effect on excitation energies O-like ions and photoionization process of F-like ions under the influence of strongly coupled plasma. We have employed an ion sphere model (ISM) in flexible atomic code (FAC) to study and analyze plasma effect in atomic structure of O-like ions and photoionization of F-like ions. We have presented shift in excitation energies of lowest 10 levels of Fe XIX, Co XX, Ni XXI, Cu XXII and Zn XXIII at electron densities ranges 1022–1024 cm−3 under plasma environment. We have also compared our transition wavelengths for Fe XIX with wavelengths observed in ENEA laser facility and calculated from Hebrew University Lawrence Livermore Atomic Code (HULLAC) code at electron density 1021 cm−3. The lowering in ionization potentials and effect on photoionization cross sections for ground and first excited states of Fe XVIII, Co XIX, Ni XX, Cu XXI and Zn XXII also studied at electron densities ranges 1022–1024 cm−3 at five photo-electron energies ranges 100–500 eV.