Erlangen 2018 – scientific programme
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MO: Fachverband Molekülphysik
MO 20: Resonant Energy Transfer and Interatomic Coulombic Decay I
MO 20.2: Talk
Thursday, March 8, 2018, 14:30–14:45, PA 1.150
Superexchange Interatomic Coulombic Decay: a bridged assisted mechanism — •Nicolas Sisourat1, Tsveta Miteva1, Sévan Kazandjian1, Petra Votavová2, and Přemysl Kolorenč2 — 1Sorbonne Universités, UPMC Univ Paris 06, UMR 7614, Laboratoire de Chimie Physique Matière et Rayonnement, F-75005 Paris, France — 2Charles University, Faculty of Mathematics and Physics, Institute of Theoretical Physics, V Holešovičkách 2, 180 00 Prague, Czech Republic
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.
The rates of ICD depend on the distance between the interacting species. At large interatomic distances R, the process can be viewed as an exchange of a virtual photon between the interacting species. In this so-called virtual photon exchange mechanism the decay rates display a 1/R6 dependence.
We recently demonstrated that the ICD rates are substantially enhanced in the presence of an ICD inactive atom, i.e. an atom whose ionization potential is greater than the excess energy of the excited species. This enhancement occurs due to coupling of the resonance state to intermediate virtual states of the bridge atom.
During the talk, I will present the Fano-Stieltjes method we employed for computing the ICD rates. Accuracy of the method will be shortly discussed. Finally, some examples illustrating this novel mechanism will be reported.