Breakup of 8B and the S17 astrophysical factor revisited

Details Breakup of 8B and the S17 astrophysical factor revisited Breakup of 8B and the S17 astrophysical factor revisited

2003-12-22

arxiv.org/abs/nucl-th/0312101v1

Phys.Rev. C69 (2004) 032802

Physics

Nuclear Physics

Nuclear Theory

6 pages, 4 figures submitted to Phys. Rev. C

Scientific paper

10.1103/PhysRevC.69.032802

Existing experimental data for the breakup of 8B at energies from 30 to 1000 MeV/nucleon on light through heavy targets are analyzed in detail in terms of an extended Glauber model. The predictions of the model are in excellent agreement with independent reaction data (reaction cross sections and parallel momentum distributions for core like fragments). Final state interactions have been included in the Coulomb dissociation component. We extract asymptotic normalization coefficients (ANC) from which the strophysical factor S17(0) for the key reaction for solar neutrino production, 7Be(p,gamma)8B, can be evaluated. Glauber model calculations using different effective interactions give consistent, though slightly different results. The differences give a measure of the precision one can expect from the method. The unweighted average of all ANCs extracted leads to S17(0)=18.7+/-1.9 eVb. The results of this new analysis are compared with the earlier one. They are consistent with the values from most direct measurements and other indirect methods.

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