Mechanisms of spontaneous two-electron emission from core-excited states of molecular CO |
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Authors: | Kaneyasu T Hikosaka Y Lablanquie P Penent F Andric L Gamblin G Eland J H D Tamenori Y Matsushita T Shigemasa E |
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Institution: | UVSOR Facility, Institute for Molecular Science, Okazaki 444-8585, Japan. |
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Abstract: | We demonstrate that the observation of slow electrons emitted in the decay of molecular core-excited states can be a sensitive probe of the double Auger processes, and that in combination with electron-electron coincidence spectroscopy, it can provide clear insight into the mechanisms involved. The present study identifies all cascade Auger paths from the C1s-to-Rydberg states in CO to final states of CO2+. One pathway includes the first directly identified case of molecular level-to-level autoionization of a cation and shows remarkable selectivity for a specific final state. |
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