Data di Pubblicazione:
2008
Citazione:
Precision study of ground state capture in the 14N(p,gamma)15O reaction / M. Marta, A. Formicola, G. Gyurky, D. Bemmerer, C. Broggini, A. Caciolli, P. Corvisiero, H. Costantini, Z. Elekes, Z. Fulop, G. Gervino, A. Guglielmetti, C. Gustavino, G. Imbriani, M. Junker, R. Kunz, A. Lemut, B. Limata, C. Mazzocchi, R. Menegazzo, P. Prati, V. Roca, C. Rolfs, M. Romano, C. Rossi Alvarez, E. Somorjai, O. Straniero, F. Strieder, F. Terrasi, H.P. Trautvetter, A. Vomiero. - In: PHYSICAL REVIEW. C, NUCLEAR PHYSICS. - ISSN 0556-2813. - 78:2(2008), pp. 022802.022802.1-022802.022802.4.
Abstract:
The rate of the hydrogen-burning carbon-nitrogen-oxygen (CNO) cycle is controlled by the slowest process,
14N(p,γ )15O, which proceeds by capture to the ground and several excited states in 15O. Previous extrapolations for
the ground state contribution disagreed by a factor 2, corresponding to 15% uncertainty in the total astrophysical
S factor. At the Laboratory for Underground Nuclear Astrophysics (LUNA) 400 kV accelerator placed deep
underground in the Gran Sasso facility in Italy, a new experiment on ground state capture has been carried out
at 317.8, 334.4, and 353.3 keV center-of-mass energy. Systematic corrections have been reduced considerably
with respect to previous studies by using a Clover detector and by adopting a relative analysis. The previous
discrepancy has been resolved, and ground state capture no longer dominates the uncertainty of the total S factor.
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
M. Marta, A. Formicola, G. Gyurky, D. Bemmerer, C. Broggini, A. Caciolli, P. Corvisiero, H. Costantini, Z. Elekes, Z. Fulop, G. Gervino, A. Guglielmetti, C. Gustavino, G. Imbriani, M. Junker, R. Kunz, A. Lemut, B. Limata, C. Mazzocchi, R. Menegazzo, P. Prati, V. Roca, C. Rolfs, M. Romano, C. Rossi Alvarez, E. Somorjai, O. Straniero, F. Strieder, F. Terrasi, H.P. Trautvetter, A. Vomiero
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