Fig. 2. Top panel: The average numbers of electrons that are bound to ⁴⁴Ti and to ⁵⁶Fe at mass coordinate q and at time t (in y) after the explosion. Middle: Effective decay rates of the shocked ⁴⁴Ti during the time span between and t [Eq. (11)] in units of the laboratory rate . Bottom: The corresponding ⁴⁴Ti radioactivity observable at time t ("age") relative to the case that assumes no reduction of the -decay rate. The parameter values used here are the same as those for Fig. 1