Figure 2.

Depiction of the 7-Aza dimer as it undergoes a stepwise ESDPT. Masses are shown for the species that would arise at each step if Coulomb explosion were to break the dimer apart. Mass spectra are also shown at a time t and t + 600 fs depicting the rise seen in the mass 119 signal as the intermediate is formed and broken apart by Coulomb explosion. For the case of the reactive dimer, the mass 119 signal drops back to its original intensity, whereas in the case of the nonreactive dimer, the mass 119 species remains dominant over the mass 118 throughout the duration of the experiment.