First measurement of the low-energy direct capture in 20Ne(p, γ) 21Na and improved energy and strength of the Ec.m. = 368 keV resonance
- Creators
- E. Masha
- L. Barbieri
- J. Skowronski
- M. Aliotta
- C. Ananna
- F. Barile
- D. Bemmerer
- A. Best
- A. Boeltzig
- C. Broggini
- C. G. Bruno
- A. Caciolli
- M. Campostrini
- F. Casaburo
- F. Cavanna
- G. F. Ciani
- A. Ciapponi
- P. Colombetti
- A. Compagnucci
- P. Corvisiero
- L. Csedreki
- T. Davinson
- R. Depalo
- A. Di Leva
- Z. Elekes
- F. Ferraro
- E. M. Fiore
- A. Formicola
- Zs. Fülöp
- G. Gervino
- A. Guglielmetti
- C. Gustavino
- Gy. Gyürky
- G. Imbriani
- J. José
- M. Junker
- M. Lugaro
- P. Manoj
- P. Marigo
- R. Menegazzo
- V. Paticchio
- D. Piatti
- P. Prati
- D. Rapagnani
- V. Rigato
- D. Robb
- L. Schiavulli
- R. S. Sidhu
- O. Straniero
- T. Szücs
- S. Zavatarelli
- Others:
- Masha, E.
- Barbieri, L.
- Skowronski, J.
- Aliotta, M.
- Ananna, C.
- Barile, F.
- Bemmerer, D.
- Best, A.
- Boeltzig, A.
- Broggini, C.
- Bruno, C. G.
- Caciolli, A.
- Campostrini, M.
- Casaburo, F.
- Cavanna, F.
- Ciani, G. F.
- Ciapponi, A.
- Colombetti, P.
- Compagnucci, A.
- Corvisiero, P.
- Csedreki, L.
- Davinson, T.
- Depalo, R.
- Di Leva, A.
- Elekes, Z.
- Ferraro, F.
- Fiore, E. M.
- Formicola, A.
- Fülöp, Zs.
- Gervino, G.
- Guglielmetti, A.
- Gustavino, C.
- Gyürky, Gy.
- Imbriani, G.
- José, J.
- Junker, M.
- Lugaro, M.
- Manoj, P.
- Marigo, P.
- Menegazzo, R.
- Paticchio, V.
- Piatti, D.
- Prati, P.
- Rapagnani, D.
- Rigato, V.
- Robb, D.
- Schiavulli, L.
- Sidhu, R. S.
- Straniero, O.
- Szücs, T.
- Zavatarelli, S.
Description
The 20Ne(p, γ ) 21Na reaction is the slowest in the NeNa cycle and directly affects the abundances of the Ne and Na isotopes in a variety of astrophysical sites. Here we report the measurement of its direct capture contribution, for the first time below Ec.m. = 352 keV, and of the contribution from the Ec.m. = 368 keV resonance, which dominates the reaction rate at T = 0.03–1.00 GK. The experiment was performed deep underground at the Laboratory for Underground Nuclear Astrophysics, using a high-intensity proton beam and a windowless neon gas target. Prompt γ rays from the reaction were detected with two high-purity germanium detectors. We obtain a resonance strength ωγ = (0.112 ± 0.002stat ± 0.005sys) meV, with an uncertainty a factor of 3 smaller than previous values. Our revised reaction rate is 20% lower than previously adopted at T < 0.1 GK and agrees with previous estimates at temperatures T 0.1 GK. Initial astrophysical implications are presented.
Additional details
- URL
- https://hdl.handle.net/11567/1155301
- URN
- urn:oai:iris.unige.it:11567/1155301
- Origin repository
- UNIGE