Extending the Dispersive Optical Model to β-unstable Systems
Phenomenological optical-model potentials (OMPs) are a key ingredient for nuclear cross section libraries that enter astrophysical nucleosynthesis simulations. While existing OMPs can reliably reproduce direct reaction cross sections on β-stable targets, the lack of scattering data on β-unstable tar...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2025-01-01
|
| Series: | EPJ Web of Conferences |
| Online Access: | https://www.epj-conferences.org/articles/epjconf/pdf/2025/07/epjconf_cnr2024_05001.pdf |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Phenomenological optical-model potentials (OMPs) are a key ingredient for nuclear cross section libraries that enter astrophysical nucleosynthesis simulations. While existing OMPs can reliably reproduce direct reaction cross sections on β-stable targets, the lack of scattering data on β-unstable targets limits the credibility of OMPs extrapolated to the extremely neutron-rich regime reached during explosive nucleosynthesis. Recent work with fully non-local dispersive OMPs indicates that even in regions where scattering data are unavailable, bound-state quantities, such as the proton and neutron number and binding energy, can serve as powerful constraints on the OMP. In this proceeding, we describe first steps toward a global, non-local, uncertainty-quantified, and fully dispersive OMP capable of leveraging both scattering and bound-state observables from stability to the driplines. As an example, we show how single-nucleon scattering data on traditional OMP training nuclei 40,48Ca, 90Zr, 112,124Sn, 208Pb can be combined with structural information to improve neutron capture cross sections at astrophysical energies relevant for the i-process and weak r-process. |
|---|---|
| ISSN: | 2100-014X |