Direct Cleavages and Rearrangement Fragmentations

The reactions of excited ions are not always as straightforward as expected. Of course, the existence of multiple fragmentation pathways for an ion consisting of several tens of atoms brings about different types of reactions all of which certainly will not lead to the same fc(E) function. [40] 

The fc(E) functions of two reactions of the same type, appear to be parallel in comparison, starting out at different activation energies (Fig. 2.7a), whereas different types of reactions will show a crossover of their fc(E) functions at intermediate excess energy (Fig. 2.7b). 

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