We investigate the performance of Stieltjes Imaging applied to Lanczos pseudo-spectra generated at
the coupled cluster singles and doubles, coupled cluster singles and approximate iterative doubles
and coupled cluster singles levels of theory in modeling the photodetachment cross sections of the
closed shell anions H−, Li−, Na−, F−, Cl−, and OH−. The accurate description of double excitations
is found to play a much more important role than in the case of photoionization of neutral species
