Formation of doubly charged Co2+ions: a combined experimental and theoretical study
- 28 August 1988
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic, Molecular and Optical Physics
- Vol. 21 (16) , 2815-2826
- https://doi.org/10.1088/0953-4075/21/16/007
Abstract
The formation of doubly charged molecular ions of carbon monoxide is studied by means of ion translational energy spectrometry of products resulting from electron loss collisions of CO+ and He and double electron capture collisions of H+ and CO. Theoretical calculations of potential energy functions of several low-lying states of CO2+ have been carried out using a high level, all-electron ab initio technique using large Gaussian basis sets. Vertical double ionisation energies of CO are measured to be 40.21+or-0.35 eV and 39.45+or-0.20 eV. The former value pertains to a metastable CO2+ state whereas the latter is ascribed to a dissociative state. The energy difference of 0.76 eV is a measure of the splitting between the lowest 3 Pi and 1 Pi states.Keywords
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