Strömberg, Dag F. ; Martínez-Pinedo, Gabriel ; Jones, Samuel ; Kirsebom, Oliver S. ; Nowacki, Frédéric (2020)
Impact of forbidden electron capture in intermediate-mass stars.
In: Journal of Physics: Conference Series, 1668
doi: 10.1088/1742-6596/1668/1/012040
Artikel, Bibliographie
Dies ist die neueste Version dieses Eintrags.
Kurzbeschreibung (Abstract)
Intermediate-mass stars (7-11 M⊙) form degenerate ONe cores following carbon burning. In some cases the cores grow dense enough to trigger electron capture on various nuclei. The double electron capture ²⁰Ne(e⁻, v e)²⁰F(e⁻, νe )²⁰O releases enough heat to trigger runaway oxygen burning. Depending on the conditions at ignition the outcome is either a collapse to a neutron star or a thermonuclear explosion with an ONeFe remnant. We have investigated the impact of two forbidden transitions on the ignition conditions using the MESA stellar evolution code. The 0⁺ → 2⁺ transition between the ground states of ²⁰Ne and ²⁰F has been measured experimentally and is found to decrease the ignition density while pushing the point of ignition off-centre. We have also studied the 2⁺ → 4⁺ transition between ²⁴Na and ²⁴Ne through a shell model calculation. Its impact is found to be marginal in our simulations, but it might play a role in the development of convectional instabilities.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2020 |
| Autor(en): | Strömberg, Dag F. ; Martínez-Pinedo, Gabriel ; Jones, Samuel ; Kirsebom, Oliver S. ; Nowacki, Frédéric |
| Art des Eintrags: | Bibliographie |
| Titel: | Impact of forbidden electron capture in intermediate-mass stars |
| Sprache: | Englisch |
| Publikationsjahr: | 2020 |
| Verlag: | IOP Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Physics: Conference Series |
| Jahrgang/Volume einer Zeitschrift: | 1668 |
| Kollation: | 6 Seiten |
| DOI: | 10.1088/1742-6596/1668/1/012040 |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | Intermediate-mass stars (7-11 M⊙) form degenerate ONe cores following carbon burning. In some cases the cores grow dense enough to trigger electron capture on various nuclei. The double electron capture ²⁰Ne(e⁻, v e)²⁰F(e⁻, νe )²⁰O releases enough heat to trigger runaway oxygen burning. Depending on the conditions at ignition the outcome is either a collapse to a neutron star or a thermonuclear explosion with an ONeFe remnant. We have investigated the impact of two forbidden transitions on the ignition conditions using the MESA stellar evolution code. The 0⁺ → 2⁺ transition between the ground states of ²⁰Ne and ²⁰F has been measured experimentally and is found to decrease the ignition density while pushing the point of ignition off-centre. We have also studied the 2⁺ → 4⁺ transition between ²⁴Na and ²⁴Ne through a shell model calculation. Its impact is found to be marginal in our simulations, but it might play a role in the development of convectional instabilities. |
| ID-Nummer: | Artikel-ID: 012040 |
| Zusätzliche Informationen: | Erstveröffentlichung; Nuclear Physics in Astrophysics IX (NPA-IX), 15.-20.09.2019, Frankfurt, Germany |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 530 Physik |
| Fachbereich(e)/-gebiet(e): | 05 Fachbereich Physik 05 Fachbereich Physik > Institut für Kernphysik |
| Hinterlegungsdatum: | 20 Aug 2024 06:55 |
| Letzte Änderung: | 20 Aug 2024 06:55 |
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| Suche nach Titel in: | TUfind oder in Google |
Verfügbare Versionen dieses Eintrags
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Impact of forbidden electron capture in intermediate-mass stars. (deposited 29 Jul 2024 09:36)
- Impact of forbidden electron capture in intermediate-mass stars. (deposited 20 Aug 2024 06:55) [Gegenwärtig angezeigt]
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