Averaged final mass fraction ratio of vanadium to manganese as tracer of the expansion timescale, at fixed neutron excess, η = 2.27 × 10^-5. The meaning of the point types and colors is the same as in Fig. 9. The results are shown for different τ_rise in the range 10^-9−0.2 s, and X(¹²C) in the range 0.3−0.7. The solid line is a fit given by M(V)/M(Mn) = log  ^[log ⁽1/τ^)0.7] −1.7.