  Meson exchange contributions have been suggested as one class of medium
effects which might explain the continuing discrepancy between experimental
results and theoretical predictions for K+-nucleus scattering. These exchange
effects are negligible for near-forward K+-deuteron scattering because of the
large size of the deuteron, but at large angles they might be expected to be
significant compared to the weak double scattering. Detailed calculations,
however, show that the quadrupole and magnetic contributions from single
scattering are large enough to dominate both double scattering and exchange
contributions even at large momentum transfers. The exchange contributions
become significant only if the target deuteron is highly aligned so that the
single scattering contributions are greatly reduced.
