Original and mixed composition profiles for three He-star explosion models. Left column: chemical composition versus Lagrangian mass in the original, unmixed he3p3, he5p0, and he8p0 ejecta models of Ertl et al. (2020) at 1 d (the original mass fraction is shown for ⁵⁶Ni) – ejecta properties are summarized in Table 1. The shaded areas denote dominant shells, of a given composition, that are used in the shuffling procedure. Right column: corresponding ejecta at 200 d in which the main progenitor shells have been shuffled in mass space within the Lagrangian mass cut M_sh = 0.43, 1.43, and 3.40 M_⊙ (details on the shuffling procedure are given in the appendix of Dessart & Hillier 2020b). In the right column, the mass fractions shown are obtained by summing over all isotopes associated with a given element (see Sect. 2.3 and Table 2 for details). The x-axis covers the same range in each row and the y-axis covers the same range in all panels.