We present S factor data obtained from the Coulomb dissociation of 83 MeV/nucleon ^ { 8 } B , and analyze ^ { 7 } Be 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 E 2 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 ^ { 7 } Li + n and ^ { 7 } Be + p elastic scattering data , we examine the mutual consistency of recent S _ { 17 } measurements and obtain a recommended value for S _ { 17 } ( 0 ) of 18.6 \pm 0.4 ( experimental ) \pm 1.1 ( extrapolation ) eV b ( 1 \sigma ) .
This result is in good agreement with recent experimental determinations of the asymptotic normalization coefficient of the valence proton wave function in ^ { 8 } B .