Theoretical and experimental study of electron impact ionization (e,2e) of para-benzoquinone for an intermediate incident electron energy

We will present a theoretical and experimental study of electron impact single ionization of para-benzoquinone [1]. Experimental data were taken for the unresolved combination of the 4 highest occupied molecular orbitals (4b3g, 5b2u, 1b1g, and 2b3u) of para-benzoquinone. The theoretical results are compared with experimental data measured in an asymmetric coplanar geometry for a 250 eV incident electron energy, an ejected electron energy of 20 eV, and for four fixed scattered electron angles of 7.5$^{\mathrm{o}}$, 10$^{\mathrm{o}}$, 12.5$^{\mathrm{o}}$, and 15$^{\mathrm{o}}$. Theoretical M3DW (molecular 3-body distorted wave) results summed over the four unresolved states will be compared to the experimental data. As the experimental TDCS measurements for each scattering angle are cross normalized, we fully assess the ability of the theoretical model to reproduce the experimental data in terms of angular distribution and intensity. [1] Jones \textit{et al.,} J. Chem. Phys. \textbf{145}, 164306 (2016).