Dielectronic recombination of hydrogenlike oxygen in a heavy-ion storage ring

Abstract

State-resolved cross sections for the dielectronic recombination of hydrogenlike oxygen ions with free electrons have been measured for the first time using the electron cooling device in the heavy-ion Test Storage Ring in Heidelberg. Energies and cross sections for individual terms of the configuration 2l2l' were determined. Two-electron resonances 2lnl' with n\ensuremath{\ge}3 contribute 90% to the total dielectronic-recombination cross section. Energies and cross sections are in reasonable agreement with available calculations.