Three-body effects in the (d,²He) charge-exchange reaction

The importance of an explicit treatment of continuum channels in the (d,²He) 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 ¹²C(d,²He)¹²B(g.s.) 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 ²He optical potential within distorted waves Born approximation calculations.