The s-process or slow-neutron-capture-process is a nucleosynthesis process that occurs at relatively low neutron density and intermediate temperature conditions in stars. The theory of the s process of nucleosynthesis has received considerable development during recent years, mainly as the result of more detailed physical and. Nucleosynthesis by the slow neutron capture process (s process) in the He burning zones of Red Giant stars contributes about half of the isotopic abundances in Among the various processes responsible for the formation of the heavy elements in stars, the slow neutron capture process (s-process) is distinguished by the fact. s-process nucleosynthesis 1. Introduction 947 This review deals with stellar nucleosynthesis by slow neutron captures (the s-process). It concentrates on the. The r-process is a nucleosynthesis process that occurs in core-collapse supernovae (see also supernova nucleosynthesis) and is responsible for the creation of. Nucleosynthesis of the Heavy Elements. Slow capture produces nuclei near the valley of beta. The di erence between the s-process and r-process nucleosynthesis is Big Bang Nucleosynthesis. The reactions at right also produce helium and usually go faster since they do not involve the relatively slow process of photon emission. This process is called nucleosynthesis. the slow capture of neutrons. The s-process works as long as the decay time for unstable isotopes is longer than the. 1.2 Nucleosynthesis. A realistic model for the nucleosynthesis of the elements must be based on empirical data for their ‘cosmic abundance’.