Advances in atomic data for plasma diagnostics

29th International Conference on Photonic, Electronic, and Atomic Collisions

Fernández-Menchero, L.^1 ; Del Zanna, G.^2 ; Badnell, N.R.^1

Department of Physics, University of Strathclyde, Glasgow

G4 0NG, United Kingdom^1

Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Cambridge

CB3 0WA, United Kingdom^2

关键词: Collision strength;    Electron-impact excitation;    Fusion plasma diagnostics;    Highly excited state;    Intermediate coupling;    Isoelectronic sequence;    R-matrix calculation;    Transformation methods;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/635/5/052035/pdf
DOI  :  10.1088/1742-6596/635/5/052035

来源: IOP

【 摘 要 】

We present sets of new atomic data for astrophysical and fusion plasma diagnostics. We calculate electron-impact excitation collision strengths and effective collisions strengths for the Be- and Mg-like isoelectronic sequences up to Krq+. We use the R-Matrix Intermediate-Coupling Frame Transformation method. We also study the accuracy of calculations for highly-excited states and give extrapolation rules to estimate the effective collision strengths and their error at high n. We demonstrate the importance of a well converged CI/CC expansion in the R-matrix calculation to get good quality results, mainly for highly-excited states.