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Dissociation of 
with 18 eV of internal energy. Time evolution of the parent and fragment 
ions without (a,c) and with (b,d) charge constraint. Top: for a given number m of C atoms (we also indicate the corresponding observed numbers n of H atoms); bottom: for a selection of the most abundant fragments identified by the (m,n) pair. The lines joining the data points were drawn for convenience. (Online version in colour.)
