Triple differential cross sections (TDCSs) for the electron impact ionization of the unresolved combination of the 4 highest occupied molecular orbitals (4b3g, 5b2u, 1b1g, and 2b3u) of para-benzoquinone are reported. These were obtained in an asymmetric coplanar geometry with the scattered electron being observed at the angles −7.5°, −10.0°, −12.5° and −15.0°. The experimental cross sections are compared to theoretical calculations performed at the molecular 3-body distorted wave level, with a marginal level of agreement between them being found. The character of the ionized orbitals, through calculated momentum profiles, provides some qualitative interpretation for the measured angular distributions of the TDCS.
D. B. Jones et al., "Electron Impact Ionization Dynamics of para-benzoquinone," Journal of Chemical Physics, vol. 145, American Institute of Physics (AIP), Jan 2016.
The definitive version is available at https://doi.org/10.1063/1.4965919
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01 Jan 2016