arXiv:astro-ph/9909317·v3·Astrophysics
A Measurement of the Coulomb Dissociation of 8B at 254 MeV/nucleon and the 8B Solar Neutrino Flux
N. Iwasa🇩🇪 · F. Boue🇩🇪 · G. Surowka🇩🇪 · K. Suemmerer🇩🇪 · T. Baumann🇩🇪 · B. Blank🇫🇷 · S. Czajkowski🇫🇷 · A. Forster🇩🇪 · M. Gai🇺🇸 · H. Geissel🇩🇪 · E. Grosse🇩🇪 · M. Hellstrom🇩🇪
Abstract
We have measured the Coulomb dissociation of 8B into 7Be and proton at 254 MeV/nucleon using a large-acceptance focusing spectrometer. The astrophysical S17 factor for the 7Be(p,gamma)8B reaction at E{c.m.} = 0.25-2.78 MeV is deduced yielding S17(0)=20.6 \pm 1.2 (exp.) \pm 1.0 (theo.) eV-b. This result agrees with the presently adopted zero-energy S17 factor obtained in direct-reaction measurements and with the results of other Coulomb-dissociation studies performed at 46.5 and 51.2 MeV/nucleon.
Comments: paper to be published in Phys. Rev. Lett. 3 figures. New Version fixes formatting problems with the figures only. There are no other changes