We evaluated the uncertainty relevant to s-process nucleosynthesis using
a Monte-Carlo centred approach. We are based on a realistic and general
prescription of temperature dependent uncertainty for the reactions. We
considered massive stars for the weak s-process and AGB stars for the
main s-process. We found that the adopted uncertainty for (n, γ )
rates, tens of per cent on average, affect the production of s-process
nuclei along the β -stability line, while for β -decay, for
whichcontributions from excited states enhances the uncertainty, has the
strongest impact on branching points.
