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- W3048280222 abstract "We report threshold collision induced dissociation experiments on cationic pyrene clusters, for sizes n = 2–6. Fragmentation cross sections are recorded as a function of the collision energy and analyzed with a statistical model. This model can account for the dissociation cascades and provides values for the dissociation energies. These values, of the order of 0.7 eV–1 eV, are in excellent agreement with those previously derived from thermal evaporation. They confirm the charge resonance stability enhancement predicted by theoretical calculations. In addition, remarkable agreement is obtained with theoretical predictions for the two smaller sizes n = 2 and 3. For the larger sizes, the agreement remains good, although the theoretical values obtained for the most stable structures are systematically higher by 0.2 eV. This offset could be attributed to approximations in the calculations. Still, there is an indication in the results of an incomplete description of the role of isomerization and/or direct dissociation upon collisions. Finally, by-product clusters containing dehydrogenated species are found to dissociate at energies comparable to the non-dehydrogenated ones, which shows no evidence for covalent bonds within the clusters." @default.
- W3048280222 created "2020-08-13" @default.
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- W3048280222 date "2020-08-07" @default.
- W3048280222 modified "2023-10-18" @default.
- W3048280222 title "Threshold collision induced dissociation of pyrene cluster cations" @default.
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- W3048280222 doi "https://doi.org/10.1063/5.0015385" @default.
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