MeV gamma emission lines from individual isotopes as probes of kilonovae

LIGO's detection of gravitational waves has pointed to kilonovae as crucial events to examine in order to unravel the details of the processes responsible for the synthesis of the heavy elements in the Universe, such as the rapid (r) neutron capture process. But details such as the nucleosynthesis reach of such events as well as isotopic composition of kilonovae are still not well understood. The emission spectra of MeV gamma rays from the decays of unstable nuclei could lead to strong insights if individual lines can serve to identify single isotopes. I will present an exhaustive list of MeV signals associated with individual isotopes that could be used to probe kilonovae in real time. I will also discuss how these calculations are sensitive to nuclear uncertainties (e.g. mass models) and astrophysical variations (e.g. neutron richness). Heavy element production indicators provide strong arguments for the importance of future MeV telescope missions.