Two-center interference effects in (e, 2e) ionization of H$_{2}$ and CO$_{2}$ at large momentum transfer

In recent years, there has been considerable interest in understanding quantum mechanical interference effects in molecular ionization. Since this interference appears as a consequence of coherent electron emission from the different molecular centers, it should depend strongly on the nature of the ionized molecular orbital. Such molecular orbital patterns can be investigated by means of binary (e, 2e) spectroscopy, which is a kinematically-complete electron-impact ionization experiment performed under the high-energy Bethe ridge conditions [1]. In this study, two-center interference effects in the (e, 2e) cross sections of H$_{2}$ [2] and CO$_{2}$ at large momentum transfer are demonstrated with a high-statistics experiment, in order to elucidate the relationship between molecular orbital patterns and the interference structure. It is shown that the two-center interference is highly sensitive to the phase, spatial pattern, symmetry of constituent atomic orbital, and chemical bonding nature of the molecular orbital. \\[4pt] [1] M. Takahashi, Bull. Chem. Soc. Jpn. \textbf{82}, 751 (2009).\\[0pt] [2] M. Yamazaki \textit{et al}., Phys. Rev. A \textbf{90}, 052711 (2014).