The predicted gamma-ray light curves at energies above 3.5 MeV (top) and the spectra at 10 days (bottom) given various levels of neutron-richness for a low entropy, long timescale outflow from an NSM located at 10 kpc. Line color notations are the same as Figure 3. An initial neutron-richness of Y_e = 0.15 (solid line) demonstrates the case that robustly reaches fissioning species, whereas the Y_e = 0.2 case (dashed–dotted line) shows a limited participation by fission and the Y_e = 0.3 case (dotted line) shows no participation by fission.