Chart of the nuclides highlighting the 868 experimentally unknown (n, γ) reactions relevant to the i-process nucleosynthesis. The reactions are color-coded by their uncorrelated parameter uncertainty (the ratio between maximum and minimum rates) for the nuclear set B. Some of the reaction targets are highlighted by a square contour of a pink, orange, or red color. These correspond to reaction targets, as given in Table A.1 (Sect. 4.1), for which the parameter uncertainties have a mild, medium, or high impact, respectively, on one or multiple isotopic abundances.