Comparing the mass spectra for the three different species in more detail, an interesting trend can be seen in the red shaded area highlighted in Fig. 2 : The relative abundance of CH 3 + fragments compared to the abundance of C + , CH + , and CH 2 + fragments increases dramatically as the size of the hydrocarbon ring increases.
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Hydrogen migration in inner-shell ionized halogenated cyclic hydrocarbons.
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While the center of the distributions appears to be rather independent of x , a clear trend is seen when comparing the KER for the three different molecules, with the largest KER in the smallest molecule, BCpro, and the smallest KER in the largest molecule, BCpen.