Properties of Nuclear and Coulomb Breakup of 8B

The dependence of breakup cross sections of B-8 at 65 MeV/nucleon on the target mass number AT is investigated by means of the continuum-discretized coupled-channels method (CDCC) with more reliable distorting potentials than those in the preceding study. The A(T)(1/3) scaling law of the nuclear breakup cross section is found to be satisfied only in the middle AT region of 40 less than or similar to A(T) less than or similar to 150. The interference between nuclear and Coulomb breakup amplitudes vanishes in very forward angle scattering, independently of the target nucleus. The truncation of the relative energy between the p and Be-7 fragments slightly reduces the contribution of nuclear breakup at very forward angles, while the angular region in which the first-order perturbation theory works well does not change essentially.