Coherence of inter-Coulombic (ICD) and electron transfer mediated (ETMD) decay in endofullerenes

For the photoionization of noble gas endofullerenes, the decay of fullerene innershell vacancies through the continuum of a subvalent electron in the confined atom \textit{via} the inter-Coulombic decay (ICD) pathway is calculated in the time-dependent local density approximation (TDLDA) scheme [1]. Excitations to atom-fullerene hybrid states indicate coherence between ICD and electron-transfer mediated decay (ETMD) [2]. This coherence requires that both the fullerene and the trapped atom have dipole-allowed final states, continuum and quasi-discrete, of the same symmetry. This should be the dominant above-threshold decay process for a variety of confined systems, and the strength of these resonances is such that they should be accessible for study by photoelectron spectroscopy. [1] Madjet \textit{et al.,} PRA \textbf{81}, 013202 (2010); [2] De \textit{et al.}, arXiv:1512.07291~[physics.atm-clus]