Top panel: NSE distributions for ⁵⁸Ni as a function of temperature (in units of 10⁹ K) for Y_e = 0.48 (dashed lines) and Y_e = 0.499 (solid lines), at densities of 10⁷ g cm⁻³ (thin lines) and 10⁸ g cm⁻³ (thick lines). These NSE distributions were computed with the public_nse code (Publicly available on F. X. Timmes’ webpage; http://cococubed.asu.edu/code_pages/nse.shtml) (see also Seitenzahl et al. 2008). Bottom panel: freeze-out yields based on the adiabatic thermodynamic trajectories of Magkotsios et al. (2010) for the same set of (ρ_peak, Y_e) values.