Mechanism of superexchange Interatomic Coulombic decay in rare gas clusters
| Autor: | Přemysl Kolorenč, Selma Engin, Nicolas Sisourat, Tsveta Miteva, Sévan Kazandjian, Petra Votavová |
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| Přispěvatelé: | Charles University [Prague] (CU), Laboratoire de Chimie Physique - Matière et Rayonnement (LCPMR), Institut de Chimie du CNRS (INC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Physics
010304 chemical physics Quantitative Biology::Tissues and Organs 01 natural sciences 7. Clean energy Resonance (particle physics) Interatomic Coulombic decay Superexchange Excited state Ionization 0103 physical sciences Atom Cluster (physics) Physics::Atomic and Molecular Clusters [PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph] Atomic physics Perturbation theory 010306 general physics |
| Zdroj: | Physical Review A Physical Review A, American Physical Society 2019, 100 (2), pp.022706. ⟨10.1103/PhysRevA.100.022706⟩ |
| ISSN: | 2469-9926 2469-9934 |
| DOI: | 10.1103/PhysRevA.100.022706⟩ |
| Popis: | International audience; Interatomic Coulombic Decay (ICD) is an ultrafast energy transfer process. Via ICD, an excited atom can transfer its excess energy to a neighboring atom which is thus ionized. On the example of NeHeNe cluster, we recently reported [Phys. Rev. Lett. 119, 083403 (2017)] that the total ICD widths are substantially enhanced in the presence of an ICD inactive atom. The enhancement occurs due to the coupling of the resonance state to intermediate virtual states of the bridge atom-a mechanism named superexchange ICD. In this follow-up work, we analyze the partial ICD widths in NeHeNe cluster and show that only some channels are affected by the superexchange ICD process. Furthermore, we consider superexchange ICD in NeHeAr. We show that in this system the enhancement is still present but the energy transfer mediated by the superexchange mechanism is less efficient than in NeHeNe owing to the different ionization potentials of Ar and Ne. The behavior of the computed ICD widths is explained with a simple model based on first-order perturbation theory and a Hartree-Fock-like description of the states. |
| Databáze: | OpenAIRE |
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