The formalism for calculating finite-range coupled-channels Born approximation differential cross sections is developed using the plane wave expansion method. A discussion of the computer code OUKID which was developed using this formalism is presented. A test of the reliability of this code is also presented and the effect of multistep processes on an $\alpha$ transfer reaction is shown.

NUCLEAR REACTIONS Finite-range coupled-channels Born-approximation formalism, $\alpha$ transfer.

• Received 29 September 1975

DOI:https://doi.org/10.1103/PhysRevC.13.907