Abstract
We supplement this book, and in particular the discussion of stellar nucleosynthesis presented in Chap. 3, with a list of the unstable isotopes at which branching points become relevant in the s-process reaction chain in AGB stars. For sake of clarity and a better understanding it is advisable to go through the list with a chart of the nuclides at hand. For each branching point a brief description of its operation and its relevance in the study of the s process in AGB stars is presented. The 21 branching points highlighted by a star symbol next to their atomic mass are those that Käppeler et al. (2011) considered as interesting candidates for future Time-Of-Flight (TOF) measurements of their neutron-capture cross sections. All listed isotopes suffer β − decay, unless specified otherwise. It should also be noted that usually in s-process conditions nuclear energy metastable levels higher than the ground state are not populated, thus the effect of these states does not need to be included in the study of branching points, except for the special cases reported in the list (see also Ward 1977).
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Notes
- 1.
Maria Lugaro thanks Roberto Gallino and Franz Kaeppeler for communicating the passion for branching points and for help with this section.
References
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Lugaro, M., Chieffi, A. (2018). Branching Points on the Path of the Slow Neutron-Capture Process. In: Diehl, R., Hartmann, D., Prantzos, N. (eds) Astrophysics with Radioactive Isotopes. Astrophysics and Space Science Library, vol 453. Springer, Cham. https://doi.org/10.1007/978-3-319-91929-4_12
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