Single-photon photoionization of highly charged ions under warm- and hot-dense plasmas using a unified description of screening. (September 2020)

• Record Type: Journal Article
• Authors: Chen, Zhan-Bin; Qi, Yue-Ying; Sun, Hua-Yang; Zhao, Guo-Peng; Liu, Peng-Fei; Wang, Kai
• Is Part Of: Journal of quantitative spectroscopy & radiative transfer. Volume 253(2020)
• Publication Date: 2020-09
• Subjects: Plasma shielding effect -- Warm- and hot-dense plasmas -- Photoionization; Spectrum analysis -- Periodicals; Radiation -- Periodicals; Analyse spectrale -- Périodiques; Rayonnement -- Périodiques; Radiation; Spectrum analysis; Periodicals; 543.0858
• DOI: 10.1016/j.jqsrt.2020.107170
• Languages: English
• ISSNs: 0022-4073

Abstract

Highlights: We developed a model EPPP to calculate the PI process under warm dense and dense plasmas. The reduction of energies and ionization potential, giving rise to a modification of PI and RR cross sections, is highlighted. Our results are validated by comparison with those from other works available in the literature. 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 Al 12 + 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.