Figure 9. DSC of IBr dissociation. An excited-state wavepacket traverses a nonadiabatic crossing, correlating to either I + Br(2P3/2) or I + Br*(2P1/2) products. As the IBr molecule dissociates, an ultrafast, nonresonant IR field is used to dynamically modify the adiabatic potential barrier (inset) via the Stark effect, mediating the reaction outcome. Because no transitions to other electronic states are involved, the system always remains on these two coupled potentials.
...read more