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...
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EDP Sciences
2025-01-01
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| Series: | EPJ Web of Conferences |
| Online Access: | https://www.epj-conferences.org/articles/epjconf/pdf/2025/07/epjconf_cnr2024_05001.pdf |
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| author | Pruitt Cole D. Perrotta Salvatore Simone Escher Jutta Gorton Oliver |
| author_facet | Pruitt Cole D. Perrotta Salvatore Simone Escher Jutta Gorton Oliver |
| author_sort | Pruitt Cole D. |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-8a66620d00ba46f2b417d9430e45752f |
| institution | DOAJ |
| issn | 2100-014X |
| language | English |
| publishDate | 2025-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj-art-8a66620d00ba46f2b417d9430e45752f2025-08-20T03:05:44ZengEDP SciencesEPJ Web of Conferences2100-014X2025-01-013220500110.1051/epjconf/202532205001epjconf_cnr2024_05001Extending the Dispersive Optical Model to β-unstable SystemsPruitt Cole D.0Perrotta Salvatore Simone1Escher Jutta2Gorton Oliver3Lawrence Livermore National LaboratoryLawrence Livermore National LaboratoryLawrence Livermore National LaboratoryLawrence Livermore National LaboratoryPhenomenological 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.https://www.epj-conferences.org/articles/epjconf/pdf/2025/07/epjconf_cnr2024_05001.pdf |
| spellingShingle | Pruitt Cole D. Perrotta Salvatore Simone Escher Jutta Gorton Oliver Extending the Dispersive Optical Model to β-unstable Systems EPJ Web of Conferences |
| title | Extending the Dispersive Optical Model to β-unstable Systems |
| title_full | Extending the Dispersive Optical Model to β-unstable Systems |
| title_fullStr | Extending the Dispersive Optical Model to β-unstable Systems |
| title_full_unstemmed | Extending the Dispersive Optical Model to β-unstable Systems |
| title_short | Extending the Dispersive Optical Model to β-unstable Systems |
| title_sort | extending the dispersive optical model to β unstable systems |
| url | https://www.epj-conferences.org/articles/epjconf/pdf/2025/07/epjconf_cnr2024_05001.pdf |
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