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Published on: July 27, 2018
Vibrationally resolved K-shell photoionization of CO with circularly polarized light
1Institut für Kernphysik, University of Frankfurt, August-Euler Strasse 6, D-60486 Frankfurt, Germany. jahnke@hsb.uni-frankfurt.de
Abstract:
Diffraction of a low energy (<4 eV) carbon-K-photoelectron wave that is created inside a CO molecule by absorption of a circularly polarized photon is investigated. The measurements resolve the vibrational states of the K-shell ionized CO+ molecule and display the photoelectron diffraction patterns in the molecular frame. These show significant variation for the different vibrational states. This effect is stronger than predicted by state-of-the-art theory. As this study is performed close to C-K-threshold and, therefore, far below the molecule's sigma-shape resonance, this surprisingly strong effect is not related to that resonance phenomenon.
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