The final Z versus N distribution is plotted for each dynamic simulation (after one second duration). In each panel the solid green line is at N = Z, and the large crosses mark the location of the closed neutron shells. For each panel the same initial temperature (4 × 10⁹ K), density (1 × 10¹¹ g/cc) and electron fraction (0.03) are used. The left column of panels use an expansion timescale of τ = 0.1 s and for the right column of panels, the expansion timescale is τ = 0.001 s. Each row considers a different density profile: top ρ(t) ∝ ⁽t/τ^)-1, middle ρ(t) ∝ ⁽t/τ^)-2, bottom ρ(t) ∝ ⁽t/τ^)-3.