, provides a clear technical introduction to these features. A more technical description can be found in . While the s-process creates an abundance of stable nuclei having closed neutron shells, the r-process, in neutron-rich predecessor nuclei, creates an abundance of radioactive nuclei about 10 amu below the s-process peaks.Figure 10 of shows this path of captures reaching magic neutron numbers 82 and 126 at smaller values of nuclear charge Z than it does along the stability path. These abundance peaks correspond to stable isobars produced from successive beta decays of waiting point nuclei having N = 50, 82, and 126—which are about 10 protons removed from the line of beta stability.
