The photoinduced dynamics of Ama + after excitation in the first (lowest energy) band (located at 1-3 eV) of the computationally predicted absorption spectrum were considered. We found ultrafast internal conversion in the manifold of the cationic doublet states with the time constant for gound-state (D 0 ) recovery of ∼25 fs. This time is similar to those obtained for Ada + in our preceding work , ∼10-40 fs for initial excitation energies < 3 eV. Regarding the ultrashort timescale for the internal conversion, we note that the D 1 → D 0 relaxation in the ethylene cation was measured to occur with a time constant of 7 fs .