Single ionization of simple molecules, e.g. H2, CO2, by fast charged particle impact has been studied using a reaction microscope. By measuring the momenta of the emitted electron and the recoil ionic fragment in coincidence, channel-selective low-energy electron spectra have been recorded. The experimental cross sections will be presented, compared with the predictions of state-of-the-art CDW-EIS calculations and discussed in terms of molecular effects such as (i) autoionization and predissociation channels, (ii) interference patterns resulting from the two-center geometry of the diatomic molecule, in analogy to Young's double-slit experiment and (iii) dependence of the electron emission on the orientation of the molecular axis.
C. Dimopoulou et al., "Fragmentation of Molecules by Fast Ion Impact," Journal of Physics: Conference Series, vol. 58, no. 1, pp. 49 - 54, Institute of Physics - IOP Publishing, Mar 2007.
The definitive version is available at https://doi.org/10.1088/1742-6596/58/1/007
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01 Mar 2007