Low-energy cross section of the 7Be(p,g)8B solar fusion reaction from Coulomb dissociation of 8B

Schuemann, F.; Typel, S.; Hammache, F.; Uhlig, F.; Suemmerer, K.; Boettcher, I.; Cortina, D.; Foerster, A.; Gai, M.; Geissel, H.; Greife, U.; Grosse, E.; Iwasa, N.; Koczon, P.; Kohlmeyer, B.; Kulessa, R.; Kumagai, H.; Kurz, N.; Menzel, M.; Motobayashi, T.; Oeschler, H.; Ozawa, A.; Ploskon, M.; Prokopowicz, W.; Schwab, E.; Senger, P.; Strieder, F.; Sturm, C.; Sun, Zhi-Yu; Surowka, G.; Wagner, A.; Walus, W.

Low-energy cross section of the 7Be(p,g)8B solar fusion reaction from Coulomb dissociation of 8B

Authors

Description

Final results from an exclusive measurement of the Coulomb breakup of 8B into 7Be+p at 254 A MeV are reported. Energy-differential Coulomb-breakup cross sections are analyzed using a potential model of 8B and first-order perturbation theory. The deduced astrophysical S_17 factors are in good agreement with the most recent direct 7Be(p,gamma)8B measurements and follow closely the energy dependence predicted by the cluster-model description of 8B by Descouvemont. We extract a zero-energy S_17 factor of 20.6 +- 0.8 (stat) +- 1.2 (syst) eV b.
14 pages including 16 figures, LaTeX, accepted for publication in Physical Review C. Minor changes in text and layout