Illustration of the concept of enrichment timescale. The green and blue lines represent the ²⁷Al mass ratio obtained from nuclear reaction simulations at temperatures of T = 80 MK and T = 150 MK, respectively. The dash-dotted line represents the threshold set to determine enrichment, with ξ = 2. In this case, ²⁷Al is considered enriched if M_²⁷Al > 2 × M_²⁷Al0. The two orange dashed lines correspond to the enrichment timescales, represented by their respective x-values.