Single-photon photoionization of highly charged ions under warm- and hot-dense plasmas using a unified description of screening

Abstract

We present a detailed investigation of the spectral properties and photoionization of highly charged ions subjected to warm- and hot-dense plasma environments. A unified framework, based on the finite-temperature orbital-free density functional theory, is adopted to describe (warm- and hot-dense) plasma screening effects on the nucleus-electron interaction. Self-consistent solving the coupled radial Diarc equations for both bound and continuum wave functions is used through the model, EPPP, we developed, to account the relativistic and plasma shielding effects, which is based on the flexible atomic code. The key features of the proposed model are the capacities to systematically include gradient corrections and exchange-correlation effects. Additionally, numerical tests are conducted to validate the accuracy and stability of the model. The transition energies, radiative transition parameters, ionization potentials, and photoionization (radiation recombination) cross sections of an exemplary ion Al12+are studied under finite temperature and density conditions. The present work offers an insight into electron screening of ions and is expected to be beneficial for plasma modeling.