mixed energy release

This is an effect found in a process A + BC when the attacking species A is heavy. Because A is heavy the A–B distance continues to decrease while the repulsive energy of B–C is being released.
PAC, 1996, 68, 149. (A glossary of terms used in chemical kinetics, including reaction dynamics (IUPAC Recommendations 1996)) on page 174 [Terms] [Paper]