Coulomb dissociation of 8B and the low-energy cross section of the 7Be(p,gamma)8B solar fusion reaction

F. Schuemann , F. Hammache , S. Typel , F. Uhlig , K. Suemmerer , I. Boettcher , D. Cortina , A. Foerster

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M. Gai H. Geissel U. Greife N. Iwasa P. Koczon B. Kohlmeyer R. Kulessa H. Kumagai N. Kurz M. Menzel T. Motobayashi H. Oeschler A. Ozawa M. Ploskon W. Prokopowicz E. Schwab P. Senger F. Strieder C. Sturm Zhi-Yu Sun G. Surowka A. Wagner W. Walus

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classification ⚛️ nucl-ex

keywords breakupcorrelationscoulombmultipolarityallowedangularclearlycross

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An exclusive measurement of the Coulomb breakup of 8B into 7Be+p at 254 A MeV allowed to study 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 S-(17)(0) = 18.6 +- 1.2 +- 1.0 eV b.

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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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