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Coulomb dissociation of 8B and the low-energy cross section of the 7Be(p,gamma)8B solar fusion reaction |
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| Authors: | Schümann F Hammache F Typel S Uhlig F Sümmerer K Böttcher I Cortina D Förster A Gai M Geissel H Greife U Iwasa N Koczoń P Kohlmeyer B Kulessa R Kumagai H Kurz N Menzel M Motobayashi T Oeschler H Ozawa A Płoskoń M Prokopowicz W Schwab E Senger P Strieder F Sturm C Sun Zhi-Yu Surówka G Wagner A Waluś W |
| Institution: | Institut für Physik mit Ionenstrahlen, Ruhr-Universit?t Bochum, D-44780 Bochum, Germany. |
| Abstract: | An exclusive measurement of the Coulomb breakup of 8B into 7Be+p at 254A MeV allowed the study of the angular correlations of the breakup particles. These correlations demonstrate clearly that E1 multipolarity dominates and that E2 multipolarity can be neglected. By using a simple single-particle model for 8B and treating the breakup in first-order perturbation theory, we extract a zero-energy S factor of S17(0)=18.6+/-1.2+/-1.0 eV b, where the first error is experimental and the second one reflects the theoretical uncertainty in the extrapolation. |
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