Kinetic energies E_K,unbound of the unbound ejecta per 0.5 dex in density at ∼200 s and ∼500 s, for b ranging from 0.17 to 0.20. For b = 0.20 (and b = 0.19), E_K,unbound at ∼500 s is dominated by low-density, (very) high-velocity material, and is hence larger than at ∼200 s. However, as b decreases (e.g., b = 0.17 and lower, not shown) and nuclear fusion becomes significant, there is only a slight change in E_K,unbound with time owing to the decreased presence of such material. The peaks of the kinetic energies shift to lower densities with time due to the expansion of the ejecta.