Phys. Rev. C 68, 045802 (2003) [7 pages]Electromagnetic dissociation of 8B and the astrophysical S factor for 7Be(p,γ)8BReceived 16 April 2003; published 20 October 2003 We present S factor data obtained from the Coulomb dissociation of 83 MeV∕nucleon 8B, and analyze 7Be longitudinal momentum distributions measured at 44 and 81 MeV∕nucleon using a potential model, first-order perturbation theory, and dynamical solution of the time-dependent Schrödinger equation. Comparing our results with independent continuum-discretized coupled channels calculations, we study the reaction model and beam energy dependence of the E2 contribution to the dissociation cross section. By fitting radiative capture and Coulomb breakup data taken below relative energies of 400 keV with potential models constrained by 7Li+n and 7Be+p elastic scattering data, we examine the mutual consistency of recent S17 measurements and obtain a recommended value for S17(0) of 18.6±0.4 (experimental) ±1.1 (extrapolation) eV b (1σ). This result is in good agreement with recent experimental determinations of the asymptotic normalization coefficient of the valence proton wave function in 8B. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevC.68.045802
DOI:
10.1103/PhysRevC.68.045802
PACS:
25.70.De, 26.20.+f, 26.65.+t, 27.20.+n
See AlsoComment: K. A. Snover, A. R. Junghans, and E. C. Mohrmann, Comment on “Electromagnetic dissociation of 8B and the astrophysical S factor for 7Be(p,γ)8B”, Phys. Rev. C 70, 039801 (2004). Reply: B. Davids and S. Typel, Reply to “Comment on ‘Electromagnetic dissociation of 8B and the astrophysical S factor for 7Be(p,γ)8B’ ”, Phys. Rev. C 70, 039802 (2004). |
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