The He-3(alpha, gamma)Be-7 process is a key reaction in both Big-Bang nucleosynthesis and p-p chain of Hydrogen Burning in Stars. A new measurement of the He-3(alpha, gamma)Be-7 cross section has been performed at the INFN Gran Sasso underground laboratory by both the activation and the prompt gamma detection methods. The present work reports full details of the prompt gamma detection experiment, focusing on the determination of the systematic uncertainty. The final data, including activation measurements at LUNA, are compared with the results of the last generation experiments and two different theoretical models are used to obtain the S-factor at solar energies.
The He3(α,γ)Be7 S-factor at solar energies: The prompt γ experiment at LUNA / Costantini, H.; Bemmerer, D.; Confortola, F.; Formicola, A.; Gyürky, G. y.; Bezzon, P.; Bonetti, R.; Broggini, C.; Corvisiero, P.; Elekes, Z.; Fülöp, Z. s.; Gervino, G.; Guglielmetti, A.; Gustavino, C.; Imbriani, Gianluca; Junker, M.; Laubenstein, M.; Lemut, A.; Limata, B.; Lozza, V.; Marta, M.; Menegazzo, R.; Prati, P.; Roca, Vincenzo; Rolfs, C.; Alvarez C., Rossi; Somorjai, E.; Straniero, O.; Strieder, F.; Terrasi, F.; Trautvetter, H. P.. - In: NUCLEAR PHYSICS. A. - ISSN 0375-9474. - STAMPA. - 814:(2008), pp. 144-158. [10.1016/j.nuclphysa.2008.09.014]
The He3(α,γ)Be7 S-factor at solar energies: The prompt γ experiment at LUNA
IMBRIANI, GIANLUCA;ROCA, VINCENZO;
2008
Abstract
The He-3(alpha, gamma)Be-7 process is a key reaction in both Big-Bang nucleosynthesis and p-p chain of Hydrogen Burning in Stars. A new measurement of the He-3(alpha, gamma)Be-7 cross section has been performed at the INFN Gran Sasso underground laboratory by both the activation and the prompt gamma detection methods. The present work reports full details of the prompt gamma detection experiment, focusing on the determination of the systematic uncertainty. The final data, including activation measurements at LUNA, are compared with the results of the last generation experiments and two different theoretical models are used to obtain the S-factor at solar energies.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
