Three-body effects in the ${(d,}^2\mathrm{He})$ charge-exchange reaction

The importance of an explicit treatment of continuum channels in the ${(d,}^2\mathrm{He})$ charge-exchange reaction is investigated. The continuum channel effects are clarified by a comparison of the full three-body results with calculations which use the distorted waves approximation to the three-body model. Continuum channel effects are shown to reduce the calculated ${}^{12}\mathrm{C}{(d,}^2\mathrm{He}{)}^{12}\mathrm{B}(\mathrm{g}.\mathrm{s}.\mathrm{})$ differential cross section at 270 MeV incident deuteron energy. This reduction is consistent with that from an earlier ad hoc modification of the absorptive content of an assumed ${}^2\mathrm{He}$ optical potential within distorted waves Born approximation calculations.