Surface enrichment in AGB stars after the development of the s- and i-processes. Top panel: final surface [X/Fe] ratios obtained after the development of the i-process in our reference 1 M_⊙ AGB model and the s-process in a 2 M_⊙ at [Fe/H] = −2.5 (see text for details). The model (B) is obtained after dilution of the final surface abundances of model (A) with a solar-scaled abundance distribution to reproduce the Ba (Z = 56) abundance of the model (C). Bottom panel: difference between model (B) and (C).