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- W3213301897 abstract "Laboratory studies play a crucial role in understanding the chemical nature of the interstellar medium (ISM), but the disconnect between experimental timescales and the timescales of reactions in space can make a direct comparison between observations, laboratory, and model results difficult. Here we study the survival of reactive fragments of the polycyclic aromatic hydrocarbon (PAH) coronene, where individual C atoms have been knocked out of the molecules in hard collisions with He atoms at stellar wind and supernova shockwave velocities. Ionic fragments are stored in the DESIREE cryogenic ion-beam storage ring where we investigate their decay for up to one second. After 10 ms the initially hot stored ions have cooled enough so that spontaneous dissociation no longer takes place at a measurable rate; a majority of the fragments remain intact and will continue to do so indefinitely in isolation. Our findings show that defective PAHs formed in energetic collisions with heavy particles may survive at thermal equilibrium in the interstellar medium indefinitely, and could play an important role in the chemistry in there, due to their increased reactivity compared to intact or photo-fragmented PAHs." @default.
- W3213301897 created "2021-11-22" @default.
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- W3213301897 date "2021-11-17" @default.
- W3213301897 modified "2023-10-17" @default.
- W3213301897 title "Survival of polycyclic aromatic hydrocarbon knockout fragments in the interstellar medium" @default.
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- W3213301897 doi "https://doi.org/10.1038/s41467-021-26899-0" @default.
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