Variation of the fractions f_i for the He11 progenitor, with E_exp = 2 foe, a fixed 2.15 M_⊙ compact object (then f₀ = 0.20), abundances X_in = 0.05 and X_out = 0.01, and the varying parameter indicated in each panel. Left panel: f₂ = 0.85 and f₃ = 0.95. Middle panel: f₁ = 0.30 and f₃ = 0.95. Right panel: f₁ = 0.30 and f₂ = 0.70. With the abundances fixed, the mass of ⁵⁶Ni change according to the variation of the distribution parameters. The total M(⁵⁶Ni) is indicated in parentheses.