A model is developed which accounts for the observed momentum shift of 10-50 MeV/c between experimental results and distorted wave impulse approximations. Kinematical effects of the binding energy and the Fermi momentum in reactions of the type $A(x,yz)B$ are considered to be responsible for the shift. Several examples are discussed.

• Received 10 November 1983

DOI:https://doi.org/10.1103/PhysRevC.30.654