Distribution of the Gibbs free energy per nucleon at T = 0 and ρ = 3.7 × 10¹¹   g/cm³. ΔG corresponds to the difference of the free energy per nucleon with respect to the minimum value obtained at this density for Z = 38, N = 88 and A = 124. The distribution is obtained with the HFB-19 mass model (Goriely et al. 2010) when experimental masses are not available. The open squares represent stable nuclei.