Checking the dependence on the upper level ionization potential of electron impact widths using quantum calculations

Using their dependence on the upper level ionization potential and the rest core charge of the emitter, electron impact line widths of several highly charged ions have been recently predicted. For most of them, neither theoretical nor experimental data are available (Mg VII, Na VII, Al VIII, Na VIII, Mg IX, Al X, Mg X, Al XI, Si XI, Ti XI, Cr XIII, Cr XIV, Fe XV, Fe XVI, Ni XVIII and Fe XXIII). The aim of this work is to check the above dependence and systematic trends of line widths by using quantum calculations. The comparison between the quantum results and the predicted ones shows that for the same element, the agreement is better for lower ionization degrees. © 2010 EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg.