Carbon dioxide ion dissociations after inner shell excitation and ionization: The origin of site-specific effects.

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Abstract

Multi-coincidence experiments with detection of both electrons and ions from decay of core-excited and core-ionized states of CO2 confirm that O2 (+) is formed specifically in Auger decay from the C1s-π* and O1s-π* resonances. Molecular rearrangement occurs by bending in the resonant states, and O2 (+) is produced by both single and double Auger decay. It is suggested that electron capture by C(+) after partial dissociation in the doubly ionized core of excited CO2 (+), formed by shake-up in spectator resonant Auger decay, accounts for high kinetic energy and high internal energy in some C + O2 (+) fragments.

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  • Atom and Molecular Physics and Optics
Original languageEnglish
Article number184305
JournalJournal of Chemical Physics
Volume140
Issue number18
Publication statusPublished - 2014
Publication categoryResearch
Peer-reviewedYes