Following earlier one-step calculations, we explore the contributions of multistep effects for the breakup of low energy ${}^8\mathrm{B}$ on ${}^{58}\mathrm{Ni}$ and ${}^{208}\mathrm{Pb}$ within a coupled discretized continuum channels (CDCC) formalism. The Coulomb multistep differential cross section is significantly reduced for all angles, the largest effect being the destructive interference of nuclear couplings. The nuclear peak, at around $80°$ in the one-step calculations for ${}^{58}\mathrm{Ni},$ virtually disappears.

• Received 4 December 1998

DOI:https://doi.org/10.1103/PhysRevC.59.2652