Measurement of the Coulomb Dissociation of 8B at 254 MeV /nucleon and the 8B Solar Neutrino Flux
Abstract
We have measured the Coulomb dissociation of 8B into 7Be and a proton at 254 MeV/nucleon using a large-acceptance focusing spectrometer. The astrophysical S17-factor for the 7Be\(p,γ\)8B reaction at Ec.m. = 0.25-2.78 MeV is deduced yielding S17\(0\) = 20.6+/-1.2 (expt) +/-1.0\(theor\) 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.
- Publication:
-
Physical Review Letters
- Pub Date:
- October 1999
- DOI:
- 10.1103/PhysRevLett.83.2910
- arXiv:
- arXiv:astro-ph/9909317
- Bibcode:
- 1999PhRvL..83.2910I
- Keywords:
-
- Astrophysics;
- Nuclear Experiment;
- Nuclear Theory
- E-Print:
- paper to be published in Phys. Rev. Lett. 3 figures. New Version fixes formatting problems with the figures only. There are no other changes