Computation of effective collision strengths for plasma applications using JAC

Abstract

The electron impact excitation rate coefficients or effective collision strengths are one of the ingredients for plasma modeling or plasma diagnosis. The present work provides a computational implementation for calculating excitation rate coefficients using the Jena Atomic Calculator toolbox within the framework of the relativistic distorted wave approximation. To address the need for large-scale calculations involving complex shells and heavy atoms and ions, parallel programming is implemented to expedite the computation of cross sections, collision strengths, effective collision strengths and rate coefficients. As a case study, we have calculated collision strengths, effective collision strengths and rate coefficients for Fe XXII.