Publikace ÚTF

Electron transfer mediated decay in NeXe triggered by K-LL Auger decay of Ne

Stumpf, V., Scheit, S., Kolorenč, P., Gokhberg, K.

In this article we present the results of an ab initio study of electron transfer mediated decay (ETMD) in
NeXe dimer triggered by the K-LL Auger decay of Ne. We found that the Ne2þð2p2 1DÞXe and
Ne2þð2p2 1SÞXe states which are strongly populated in the Auger process may decay by ETMD emitting
a slow electron and leading to the Coulomb explosion of the dimer which results in Neþ and Xe2þ ions.
We also computed the corresponding decay widths, the ETMD electron spectra, and the kinetic energy
release of the nuclei (KER) spectra. We showed that the spectra corresponding to the decaying states
which derive from the two multiplets have completely different shape which reflects differing accessibility
of the ETMD final states. Thus, in the Ne2þð2p2 1SÞXe state ETMD is allowed for all interatomic distances
accessible in nuclear dynamics, while in the Ne2þð2p2 1DÞXe state the ETMD channels become
closed one by one. This in turn leads to the different behavior of the ETMD decay widths and ultimately
the spectra. We show how these differences make it possible to study ETMD of the two states separately
in a coincident measurement. We also discuss how the dynamics which follow ETMD in the final state
manifold may lead to the appearance of the unusual products: Ne, Xe3þ and a slow electron.
journal:Journal of Chemical Physics

Tato stránka byla vygenerována: 2019-08-20 03:08 GMT
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