State-selected ion-molecule reactions relevant to the chemistry of Titan's ionosphere

Details State-selected ion-molecule reactions relevant to the chemistry of Titan's ionosphere State-selected ion-molecule reactions relevant to the chemistry of Titan's ionosphere

Oct 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf..803c&link_type=abstract

EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.803

Computer Science

Scientific paper

To quantify the production of neutral oxygen O atoms from atomic O+ ions, the reactions of stateselected O+(4S, 2D, 2P) atomic ions (16O+ and 18O+) with methane (CH4 and CD4) have been studied. Absolute cross sections for the ionic product formations have been measured as a function of electronic excitation of O+ and collision energy. With electronic excitation of the O+ parent ion from the ground state 4S to the long lived excited states 2D and 2P, a reduction of the total cross section and a complete inversion of the branching ratio between the main products (CH4 + and CH3 +) are observed.

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