title: Stellar and primordial nucleosynthesis of 7Be: measurement of 3He(alpha,gamma)7Be.
abstract: The 3He(alpha,gamma)7Be reaction presently represents the largest nuclear uncertainty in the predicted solar neutrino flux and has important implications on the big bang nucleosynthesis, i.e., the production of primordial 7Li. We present here the results of an experiment using the recoil separator ERNA (European Recoil separator for Nuclear Astrophysics) to detect directly the 7Be ejectiles. In addition, off-beam activation and coincidence gamma-ray measurements were performed at selected energies. At energies above 1 MeV a large discrepancy compared to previous results is observed both in the absolute value and in the energy dependence of the cross section. Based on the available data and models, a robust estimate of the cross section at the astrophysical relevant energies is proposed.
authors: INFN Sezione di Napoli, Naples, Italy.
authors: A
authors: A
authors: Di Leva
authors: L
authors: L
authors: Gialanella
authors: R
authors: R
authors: Kunz
authors: D
authors: D
authors: Rogalla
authors: D
authors: D
authors: Schürmann
authors: F
authors: F
authors: Strieder
authors: M
authors: M
authors: De Cesare
authors: N
authors: N
authors: De Cesare
authors: A
authors: A
authors: D'Onofrio
authors: Z
authors: Z
authors: Fülöp
authors: G
authors: G
authors: Gyürky
authors: G
authors: G
authors: Imbriani
authors: G
authors: G
authors: Mangano
authors: A
authors: A
authors: Ordine
authors: V
authors: V
authors: Roca
authors: C
authors: C
authors: Rolfs
authors: M
authors: M
authors: Romano
authors: E
authors: E
authors: Somorjai
authors: F
authors: F
authors: Terrasi