Electron impact excitation collision strengths for neon-like Ni XIX calculated using the relativistic R-matrix method

摘要

In a recent paper [Pramana - J. Phys. 64, 129 (2005)] results have been presented for electron impact excitation collision strengths for transitions among the fine-structure levels of the 2s22p6 and 2s22p53s configurations of Ni XIX. In this paper we demonstrate through an independent calculation with the relativistic e?‘…-matrix code that those results are unreliable and the conclusions drawn are invalid.