Main (blue) and secondary (black) i-process paths (starting from ⁵⁶Fe) in the MAϵ4α04 model, at the bottom of the convective thermal pulse, at the time of maximum neutron density (N_n = 2.17 × 10¹⁵ cm⁻³). A secondary path is considered as such if at least 30% of the total flux goes through it. The size of the arrows scales with the flux. The black squares highlight the stable and long-lived isotopes ²³²Th, ²³⁴U, ²³⁵U, ²³⁶U, ²³⁸U, ²³⁷Np, ²⁴⁴Pu, and ²⁴⁷Cm. The colour of the different nuclei corresponds to their mass fraction at that time.