Properties of Nuclear and Coulomb Breakup of 8B

概要

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The dependence of breakup cross sections of 8B at 65 MeV/nucleon on the target mass number $A_{\text{T}}$ is investigated by means of the continuum-discretized coupled-channels method (CDCC) with more reliable distorting potentials than those in the preceding study. The $A_{\text{T}}^{1/3}$ scaling law of the nuclear breakup cross section is found to be satisfied only in the middle $A_{\text{T}}$ region of $40\lesssim A_{\text{T}}\lesssim 150$. 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 7Be 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.
2009-08-15