Cross Sections for Electron Impact Excitation of O VI Lines

TL;DR

This paper calculates electron impact excitation cross sections for O VI ion lines, extending previous data to higher energies and comparing results with R-matrix calculations to improve atomic data accuracy.

Contribution

It provides new, extended collision strength calculations for O VI transitions up to 140 Ry, enhancing atomic data for astrophysical and plasma modeling.

Findings

Extended collision strength data up to 140 Ry.

Comparison with R-matrix results below 63 Ry.

Improved atomic data for O VI lines.

Abstract

Radiative atomic data and electron impact excitation cross sections for the $2s-2p$ transitions in O VI for transitions among the fine structure levels belonging to the $1s^{2}nl$ ($2\leq n\leq5$) configurations have been calculated. We have extended the calculations of fine structure collision strengths up to 140 Ry and have compared our results at energies below 63 Ry to the R-matrix ones.