“…A more complicated formula for the recombination rate coefficient k rr , containing the summation of an infinite series, was used in [14,51,52,54]. Tabulations of fits to the recombination rate coefficient k rr and/or emission coefficient q rr have been done by Tarter [47], Aldrovandi and Pequignot [48,50,53], Martin [58], Erdas and Quarati [61].…”