S17(0) Determined from the Coulomb Breakup of 83 MeV/nucleon 8B

B. Davids, D. W. Anthony, T. Aumann, Sam M. Austin, T. Baumann, D. Bazin, R. R. C. Clement, C. N. Davids, H. Esbensen, P. A. Lofy, T. Nakamura, B. M. Sherrill, J. Yurkon

Submitted on 24 January 2001


A kinematically complete measurement was made of the Coulomb dissociation of 8B nuclei on a Pb target at 83 MeV/nucleon. The cross section was measured at low relative energies in order to infer the astrophysical S factor for the 7Be(p,gamma)8B reaction. A first-order perturbation theory analysis of the reaction dynamics including E1, E2, and M1 transitions was employed to extract the E1 strength relevant to neutrino-producing reactions in the solar interior. By fitting the measured cross section from Erel = 130 keV to 400 keV, we find S17(0) = 17.8 (+1.4, -1.2) eV b.


Subjects: Nuclear Experiment; Astrophysics; Nuclear Theory