Abstract
An attempt has been made to identify the most critical nuclei for measurements at the new and developing facilities around the world for a better understanding of the rapid neutron capture process in terms of the input nuclear physics. A series of nucleosynthesis simulations have been carried out using some standard astrophysical conditions and several nuclear mass models including the FRDM (Finite Range Droplet Model) of Moller et al.,1,2 the Duflo-Zuker mass model,3 the quenched ETFSIQ of Pearson et al.,4 and the F-spin model of Teymurazyan et al.5 The most critical nuclei were determined from their impacts on the resulting r-process abundances. Impact was determined in two ways; by their relative and absolute effect on the overall elemental abundance patterns. In all the models considered, it was found uniformly that nuclei near the closed shells were the ones with the greatest impact and therefore the most critical nuclei to measure.
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