Scattering of 7 Be and 8 B and the astrophysical S17 factor

tension of the angular range was done to obtain a better determination of the optical potential in the incoming channel. We also measured the elastic scattering of a 8 B beam on a C target with the aim of checking, for the first time, the OMP that were used in the outgoing channel 8 B+ 13 C. Below we describe the radioactive beam production, the experimental setups, and the procedure for the data reduction. We then give results of calculations for optical potentials in both the incoming and outgoing channels based on a double folding procedure with an effective nucleon-nucleon interaction. We discuss the consequences of the improved secondary beam normalization, and compare revised DWBA calculations to the 14 N( 7 Be, 8 B) 13 C data from Ref. [10] in order to extract a new value for the ANCs and the corresponding astrophysical factor S17.