1. Search for Na-22 in novae supported by a novel method for measuring femtosecond nuclear lifetimes
- Author
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Fougeres, Chloe, Santos, Francois de Oliveira, Jose, Jordi, Michelagnoli, Caterina, Clement, Emmanuel, Kim, Yung Hee, Lemasson, Antoine, Guimaraes, Valdir, Barrientos, Diego, Bemmerer, Daniel, Benzoni, Giovanna, Boston, Andrew J., Bottger, Roman, Boulay, Florent, Bracco, Angela, Celikovic, Igor, Cederwall, Bo, Ciemala, Michal, Delafosse, Clement, Domingo-Pardo, Cesar, Dudouet, Jeremie, Eberth, Juergen, Fulop, Zsolt, Gonzalez, Vicente, Gottardo, Andrea, Goupil, Johan, Hess, Herbert, Jungclaus, Andrea, Kaskas, Ayse, Korichi, Amel, Lenzi, Silvia M., Leoni, Silvia, Li, Hongjie, Ljungvall, Joa, Lopez-Martens, Araceli, Menegazzo, Roberto, Mengoni, Daniele, Million, Benedicte, Mrazek, Jaromir, Napoli, Daniel R., Navin, Alahari, Nyberg, Johan, Podolyak, Zsolt, Pullia, Alberto, Quintana, Begona, Ralet, Damien, Redon, Nadine, Reiter, Peter, Rezynkina, Kseniia, Saillant, Frederic, Salsac, Marie-Delphine, Sanchez-Benitez, Angel M., Sanchis, Enrique, Senyigit, Menekse, Siciliano, Marco, Smirnova, Nadezda A., Sohler, Dorottya, Stanoiu, Mihai, Theisen, Christophe, Valiente-Dobon, Jose J., Ujic, Predrag, Zielinska, Magdalena, Fougeres, Chloe, Santos, Francois de Oliveira, Jose, Jordi, Michelagnoli, Caterina, Clement, Emmanuel, Kim, Yung Hee, Lemasson, Antoine, Guimaraes, Valdir, Barrientos, Diego, Bemmerer, Daniel, Benzoni, Giovanna, Boston, Andrew J., Bottger, Roman, Boulay, Florent, Bracco, Angela, Celikovic, Igor, Cederwall, Bo, Ciemala, Michal, Delafosse, Clement, Domingo-Pardo, Cesar, Dudouet, Jeremie, Eberth, Juergen, Fulop, Zsolt, Gonzalez, Vicente, Gottardo, Andrea, Goupil, Johan, Hess, Herbert, Jungclaus, Andrea, Kaskas, Ayse, Korichi, Amel, Lenzi, Silvia M., Leoni, Silvia, Li, Hongjie, Ljungvall, Joa, Lopez-Martens, Araceli, Menegazzo, Roberto, Mengoni, Daniele, Million, Benedicte, Mrazek, Jaromir, Napoli, Daniel R., Navin, Alahari, Nyberg, Johan, Podolyak, Zsolt, Pullia, Alberto, Quintana, Begona, Ralet, Damien, Redon, Nadine, Reiter, Peter, Rezynkina, Kseniia, Saillant, Frederic, Salsac, Marie-Delphine, Sanchez-Benitez, Angel M., Sanchis, Enrique, Senyigit, Menekse, Siciliano, Marco, Smirnova, Nadezda A., Sohler, Dorottya, Stanoiu, Mihai, Theisen, Christophe, Valiente-Dobon, Jose J., Ujic, Predrag, and Zielinska, Magdalena
- Abstract
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.
- Published
- 2023
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