Inner-shell photodetachment: Shape and Feshbach resonances of anions

► We review recent inner-shell photodetachment measurements in anions conducted at the Advanced Light Source, Berkeley. ► Observed shape and Feshbach resonances in many species, particularly the transition metals and oxygen group elements, are summarized. ► Inner-shell threshold measurements leading to novel measurements of core-excited atomic states are described. ► The large effect of post-collision interactions in anions photodetachment is described. ► Hollow-ion state formation in the He anion is reported.