Structure effects on Coulomb dissociation of B-8

摘要

Coulomb dissociation provides an alternative method for determining the radiative capture cross sections at astrophysically relevant low relative energies. For the break-up of B-8 on Ni-58, we calculate the total Coulomb dissociation cross section and the angular distribution for E1, E2 and M1. Our calculations are performed first within the standard first-order semiclassical theory of Coulomb excitation, including the correct three-body kinematics, and later including the projectile-target nuclear interactions. We study the dependence of the Coulomb dissociation cross section on the structure models assumed for the projectile. A range of potential models for Be-7 + p are compared: we look at the effect of potential shapes, deformation and inclusion of inelastic channels in the projectile states. We analyse the relative Fl and E2 components and investigate the relation between the measured cross section and the S-factor S-17 Preliminary Coulomb-nuclear interference results are presented. [References: 20]