Influence of the fission yield distribution on the nucleosynthesis in the r-process induced by neutron-star mergers

We investigate the role of nuclear fission fragment yield distributions in shapingr-process nucleosynthesis within the low-entropy environment of neutron-star-merger ejecta. Our results demonstrate that post-freeze-out fission fragment yields play a critical role in determining the abundance pattern of the secondr-process peak and its right shoulder (), even though most fission cycles occur before ther-process freeze-out. This study employs the semi-empirical General Fission (GEF) model to systematically characterize fission properties.