The impact of electron-electron correlation in ultrafast attosecond single ionization dynamics
| Autor: | Fröbel, Friedrich Georg, Ziems, Karl Michael, Peschel, Ulf, Gräfe, Stefanie, Schubert, Alexander |
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| Rok vydání: | 2020 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1088/1361-6455/ab8c21 |
| Popis: | The attosecond ultrafast ionization dynamics of correlated two- or many-electron systems have, so far, been mainly addressed investigating atomic systems. In the case of single ionization, it is well known that electron-electron correlation modifies the ionization dynamics and observables beyond the single active electron picture, resulting in effects such as the Auger effect or shake-up/down and knock-up/down processes. Here, we extend these works by investigating the attosecond ionization of a molecular system involving correlated two-electron dynamics, as well as non-adiabatic nuclear dynamics. Employing a charge-transfer molecular model system with two differently bound electrons, a strongly and a weakly bound electron, we distinguish different pathways leading to ionization, be it direct ionization or ionization involving elastic and inelastic electron scattering processes. We find that different pathways result in a difference in the electronic population of the parent molecular ion, which, in turn, involves different subsequent (non-adiabatic) postionization dynamics on different time scales. Comment: 14 pages; 9 figures; submitted to Journal of Physics B: Atomic, Molecular and Optical Physics, Joint Focus Issue on Attosecond Technology and Science |
| Databáze: | arXiv |
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