The (3)He((4)He, gamma)(7)Be reaction is the key process for the production of (7)Be and (8)B neutrinos in the Sun. We have designed a new experimental setup to study this reaction with high accuracy at low energies using two different experimental techniques. The first method consists in measuring the prompt capture gamma-ray transitions with an ultra-low background germanium detector heavily shielded and placed at close distance from a (3)He windowless gas target. With another fully shielded large-volume germanium detector we will also measure the beta-decay of the (7)Be residual nuclei. The aim of the experiment is to reduce the error on the astrophysical factor S(3,4) to 4%.
Towards a high-precision measurement of the 3He(α,γ)7Be cross section at LUNA / Costantini, H.; Bemmerer, D.; Bezzon, P.; Bonetti, R.; Broggini, C.; Casanova, M. L.; Confortola, F.; Corvisiero, P.; Cruz, J.; Elekes, Z.; Formicola, A.; Fülop, Z. s.; Gervino, G.; Gustavino, C.; Guglielmetti, A.; Gyürky, G. y.; Imbriani, Gianluca; Jesus, A. P.; Junker, M.; Lemut, A.; Marta, M.; Menegazzo, R.; Prati, P.; Roca, E.; Rolfs, C.; Romano, Mario; Rossi Alvarez, C.; Schümann, F.; Somorjai, E.; Straniero, O.; Strieder, F.; Terrasi, F.; Trautvetter, H. P.. - In: THE EUROPEAN PHYSICAL JOURNAL. A, HADRONS AND NUCLEI. - ISSN 1434-6001. - STAMPA. - 27:(2006), pp. 177-180. [10.1140/epja/i2006-08-026-5]
Towards a high-precision measurement of the 3He(α,γ)7Be cross section at LUNA
IMBRIANI, GIANLUCA;ROMANO, MARIO;
2006
Abstract
The (3)He((4)He, gamma)(7)Be reaction is the key process for the production of (7)Be and (8)B neutrinos in the Sun. We have designed a new experimental setup to study this reaction with high accuracy at low energies using two different experimental techniques. The first method consists in measuring the prompt capture gamma-ray transitions with an ultra-low background germanium detector heavily shielded and placed at close distance from a (3)He windowless gas target. With another fully shielded large-volume germanium detector we will also measure the beta-decay of the (7)Be residual nuclei. The aim of the experiment is to reduce the error on the astrophysical factor S(3,4) to 4%.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
