Mendoza-Temis, J. J. ; Wu, M. R. ; Martínez-Pinedo, G. ; Langanke, K. ; Bauswein, A. ; Janka, H.-T. ; Frank, A. (2024)
On the robustness of the r-process in neutron-star mergers against variations of nuclear masses.
In: Journal of Physics: Conference Series, 2016, 730 (1)
doi: 10.26083/tuprints-00020973
Artikel, Zweitveröffentlichung, Verlagsversion
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Kurzbeschreibung (Abstract)
r-process calculations have been performed for matter ejected dynamically in neutron star mergers (NSM), such calculations are based on a complete set of trajectories from a three-dimensional relativistic smoothed particle hydrodynamic (SPH) simulation. Our calculations consider an extended nuclear reaction network, including spontaneous, β- and neutron-induced fission and adopting fission yield distributions from the ABLA code. In this contribution we have studied the sensitivity of the r-process abundances to nuclear masses by using diferent mass models for the calculation of neutron capture cross sections via the statistical model. Most of the trajectories, corresponding to 90% of the ejected mass, follow a relatively slow expansion allowing for all neutrons to be captured. The resulting abundances are very similar to each other and reproduce the general features of the observed r-process abundance (the second and third peaks, the rare-earth peak and the lead peak) for all mass models as they are mainly determined by the fission yields. We find distinct differences in the predictions of the mass models at and just above the third peak, which can be traced back to different predictions of neutron separation energies for r-process nuclei around neutron number N = 130.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2024 |
| Autor(en): | Mendoza-Temis, J. J. ; Wu, M. R. ; Martínez-Pinedo, G. ; Langanke, K. ; Bauswein, A. ; Janka, H.-T. ; Frank, A. |
| Art des Eintrags: | Zweitveröffentlichung |
| Titel: | On the robustness of the r-process in neutron-star mergers against variations of nuclear masses |
| Sprache: | Englisch |
| Publikationsjahr: | 28 Mai 2024 |
| Ort: | Darmstadt |
| Publikationsdatum der Erstveröffentlichung: | 2016 |
| Ort der Erstveröffentlichung: | Bristol |
| Verlag: | IOP Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Physics: Conference Series |
| Jahrgang/Volume einer Zeitschrift: | 730 |
| (Heft-)Nummer: | 1 |
| Kollation: | 9 Seiten |
| DOI: | 10.26083/tuprints-00020973 |
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/20973 |
| Zugehörige Links: | |
| Herkunft: | Zweitveröffentlichung DeepGreen |
| Kurzbeschreibung (Abstract): | r-process calculations have been performed for matter ejected dynamically in neutron star mergers (NSM), such calculations are based on a complete set of trajectories from a three-dimensional relativistic smoothed particle hydrodynamic (SPH) simulation. Our calculations consider an extended nuclear reaction network, including spontaneous, β- and neutron-induced fission and adopting fission yield distributions from the ABLA code. In this contribution we have studied the sensitivity of the r-process abundances to nuclear masses by using diferent mass models for the calculation of neutron capture cross sections via the statistical model. Most of the trajectories, corresponding to 90% of the ejected mass, follow a relatively slow expansion allowing for all neutrons to be captured. The resulting abundances are very similar to each other and reproduce the general features of the observed r-process abundance (the second and third peaks, the rare-earth peak and the lead peak) for all mass models as they are mainly determined by the fission yields. We find distinct differences in the predictions of the mass models at and just above the third peak, which can be traced back to different predictions of neutron separation energies for r-process nuclei around neutron number N = 130. |
| ID-Nummer: | Artikel-ID: 012018 |
| Status: | Verlagsversion |
| URN: | urn:nbn:de:tuda-tuprints-209731 |
| Zusätzliche Informationen: | XXXIX Symposium on Nuclear Physics 2016 (Cocoyoc2016) 5–8 January 2016, Cocoyoc, Morelos, Mexico |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 530 Physik |
| Fachbereich(e)/-gebiet(e): | 05 Fachbereich Physik 05 Fachbereich Physik > Institut für Kernphysik 05 Fachbereich Physik > Institut für Kernphysik > Theoretische Kernphysik |
| Hinterlegungsdatum: | 28 Mai 2024 09:50 |
| Letzte Änderung: | 11 Jun 2024 12:01 |
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- On the robustness of the r-process in neutron-star mergers against variations of nuclear masses. (deposited 28 Mai 2024 09:50) [Gegenwärtig angezeigt]
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