F_odd as a function of [Ba/Eu] in the sample stars. The designations are the same as in Fig. 3. For comparison, we show the theoretical predictions for r-process (dashed line), s-process (dashdotted line), s- and r-process material mixture (dotted line), and i-process (diamonds). The filled diamonds correspond to i-process models with [Fe/H] and [Ba/Fe] that fall in the parameter range of our sample stars. The blue error bar indicates i-process nuclear uncertainties associated with the 1 m_⊙ model with [Fe/H] = −2.5.