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Fougeres, Chloe
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Santos, Francois de Oliveira
;
Jose, Jordi
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Michelagnoli, Caterina
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Clement, Emmanuel
;
Kim, Yung Hee
;
Lemasson, Antoine
;
Guimaraes, Valdir
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Barrientos, Diego
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Bemmerer, Daniel
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Benzoni, Giovanna
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Boston, Andrew J.
;
Bottger, Roman
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Boulay, Florent
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Bracco, Angela
;
Celikovic, Igor
;
Cederwall, Bo
;
Ciemala, Michal
;
Delafosse, Clement
;
Domingo-Pardo, Cesar
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Dudouet, Jeremie
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Eberth, Juergen
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Fulop, Zsolt
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Gonzalez, Vicente
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Gottardo, Andrea
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Goupil, Johan
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Hess, Herbert
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Jungclaus, Andrea
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Kaskas, Ayse
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Korichi, Amel
;
Lenzi, Silvia M.
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Leoni, Silvia
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Li, Hongjie
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Ljungvall, Joa
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Lopez-Martens, Araceli
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Menegazzo, Roberto
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Mengoni, Daniele
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Million, Benedicte
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Mrazek, Jaromir
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Napoli, Daniel R.
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Navin, Alahari
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Nyberg, Johan
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Podolyak, Zsolt
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Pullia, Alberto
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Quintana, Begona
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Ralet, Damien
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Redon, Nadine
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Reiter, Peter
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Rezynkina, Kseniia
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Saillant, Frederic
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Salsac, Marie-Delphine
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Sanchez-Benitez, Angel M.
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Sanchis, Enrique
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Senyigit, Menekse
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Siciliano, Marco
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Smirnova, Nadezda A.
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Sohler, Dorottya
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Stanoiu, Mihai
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Theisen, Christophe
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Valiente-Dobon, Jose J.
;
Ujic, Predrag
;
Zielinska, Magdalena
Número total de Autores: 62
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| Tipo de documento: | Artigo Científico |
| Fonte: | NATURE COMMUNICATIONS; v. 14, n. 1, p. 7-pg., 2023-09-05. |
| Resumo | |
Classical novae are thermonuclear explosions in stellar binary systems, and important sources of Al-26 and Na-22. While ? rays from the decay of the former radioisotope have been observed throughout the Galaxy, Na-22 remains untraceable. Its half-life (2.6 yr) would allow the observation of its 1.275 MeV ?-ray line from a cosmic source. However, the prediction of such an observation requires good knowledge of its nucleosynthesis. The Na-22(p, ?)Mg-23 reaction remains the only source of large uncertainty about the amount of Na-22 ejected. Its rate is dominated by a single resonance on the short-lived state at 7785.0(7) keV in Mg-23. Here, we propose a combined analysis of particle-particle correlations and velocity-difference profiles to measure femtosecond nuclear lifetimes. The application of this method to the study of the Mg-23 states, places strong limits on the amount of Na-22 produced in novae and constrains its detectability with future space-borne observatories. The authors report a particle-particle correlation and velocity-difference profile method to measure nuclear lifetime. The results obtained for excited states of 23Mg are used to constrain the production of 22Na in the astrophysical novae explosions. (AU) | |
| Processo FAPESP: | 16/02863-4 - Investigação de núcleos exóticos e astrofísica nuclear através de reações diretas e de espalhamento |
| Beneficiário: | Valdir Guimarães |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |