LOCAL SADDLES AND MAXIMA IN DOUBLE DIFFERENTIAL CROSS SECTIONS IN ION-ATOM/MOLECULE COLLISIONS B.S. Nesbitt, M.B. Shah, S.F.C. O'Rourke, D.S.F. Crothers and J. Geddes The School of Mathematics & Physics The Queen's University of Belfast Belfast BT7 1NN, N.Ireland A recently constructed apparatus to permit measurements with a range of different targets including He and H$_{2}$ has been used to study emissions at zero degrees. We have adopted the continuum-distorted-wave eikonal-initial-state (CDW-EIS) model to compare our theoretical calculations with our new observations.