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The 19F(α, p)22Ne Reaction at Energies of Astrophysical Relevance by Means of the Trojan Horse Method and Its Implications in AGB Stars (CROSBI ID 255347)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

D'Agata, G. ; Pizzone, R.G. ; La Cognata, M. ; Indelicato, I. ; Spitaleri, C. ; Palmerini, S. ; Trippella, O. ; Vescovi, D. ; Blagus, Saša ; Cherubini, S. et al. The 19F(α, p)22Ne Reaction at Energies of Astrophysical Relevance by Means of the Trojan Horse Method and Its Implications in AGB Stars // The Astrophysical journal, 860 (2018), 1; 61, 11. doi: 10.3847/1538-4357/aac207

Podaci o odgovornosti

D'Agata, G. ; Pizzone, R.G. ; La Cognata, M. ; Indelicato, I. ; Spitaleri, C. ; Palmerini, S. ; Trippella, O. ; Vescovi, D. ; Blagus, Saša ; Cherubini, S. ; Figuera, P. ; Grass, L. ; Guardo, G.L. ; Gulino, M. ; Hayakawa, S. ; Kshetri, R. ; Lamia, L. ; Lattuada, M. ; Mijatović, Tea ; Milin, Matko ; Miljanić, Đuro ; Prepolec, Lovro ; Rapisarda, G.G. ; Romano, S. ; Sergi, M.L. ; Skukan, Natko ; Soić, Neven ; Tokić, Vedrana ; Tumino, A. ; Uroić, Milivoj

engleski

The 19F(α, p)22Ne Reaction at Energies of Astrophysical Relevance by Means of the Trojan Horse Method and Its Implications in AGB Stars

The main source of F-19 in the universe has not yet been clearly identified and this issue represents one of the unanswered questions of stellar modeling. This lack of knowledge can be due to the F-19(alpha, p)Ne-22 reaction cross-section that has proven to be difficult at low energies: direct measurements stop only at about similar to 660 keV, leaving roughly half of the astrophysical relevant energy region (from 200 keV to 1.1 MeV) explored only by R-matrix calculations. In this work, we applied the Trojan Horse Method to the quasi-free three-body Li-6(F-19, p(22)Ne)d reaction performed at E-beam = 6 MeV in order to indirectly study the F-19(alpha, p)Ne-22 reaction in the sub-Coulomb energy region. In this way, we obtained the cross-section and the reaction rate in the temperature region of interest for astrophysics and free from electron screening effects. A brief analysis of the impact of the new measured reaction rate in AGB star nucleosynthesis is also presented.

asymptotic giant branch ; thermonuclear reaction-rates ; wolf-rayet stars ; cross-sections ; fluorine ; f-19 ; nucleosynthesis ; abundances ; resonances ; CNO

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Podaci o izdanju

860 (1)

2018.

61

11

objavljeno

0004-637X

1538-4357

10.3847/1538-4357/aac207

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Fizika

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