Distorted wave photoionization cross sections for use in NLTE model atmospheres: Ni _ Ni10+

30th International Conference on Photonic, Electronic, and Atomic Collisions

Preval, S.P.^1 ; Badnell, N.R.^1

Department of Physics, University of Strathclyde, Glasgow

G4 0NG, United Kingdom^1

关键词: Distorted waves;    Inner shell;    Model atmosphere;    Opacity projects;    Oscillator strengths;    Photoionization cross section;    Stellar atmospheres;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/875/3/022008/pdf
DOI  :  10.1088/1742-6596/875/3/022008

来源: IOP

【 摘 要 】

Synopsis The Opacity Project is a highly successful venture in which energy levels, oscillator strengths, and photoionization cross sections were calculated for astrophysically important elements up to iron. However, metals heavier than iron are being discovered in stellar atmospheres. The photoionization cross sections for elements and ions not covered by the Opacity Project are usually approximated with hydrogenic formulae. We present a series of valence and inner-shell distorted wave photoioniza-tion cross section calculations for use in model atmosphere calculations covering Ni-Ni10+. We discuss current progress, and future work.