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Breakup of B8 and the S17 astrophysical factor reexamined

L. Trache, F. Carstoiu, C. A. Gagliardi, and R. E. Tribble
Phys. Rev. C 69, 032802(R) – Published 31 March 2004

Abstract

Existing experimental data for the breakup of B8 at energies from 30 to 1000MeVnucleon 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 corelike fragments). Final-state interactions have been included in the Coulomb dissociation component. We extract asymptotic normalization coefficients (ANC) from which the astrophysical factor S17(0) for the key reaction for solar neutrino production, Be7(p,γ)B8, 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±1.9eVb. 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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  • Received 22 December 2003

DOI:https://doi.org/10.1103/PhysRevC.69.032802

©2004 American Physical Society

Authors & Affiliations

L. Trache1,*, F. Carstoiu1,2, C. A. Gagliardi1, and R. E. Tribble1

  • 1Cyclotron Institute, Texas A&M University, College Station, Texas 77843, USA
  • 2National Institute of Physics and Nuclear Engineering H. Hulubei, Bucharest, Romania

  • *Electronic address: l-trache@tamu.edu

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Vol. 69, Iss. 3 — March 2004

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