Publikace ÚTF

The effect of the partner atom on the spectra of interatomic Coulombic decay triggered by resonant Auger processes

Miteva, T.; Chiang, Y. -C.; Kolorenč, P.ö Kuleff, A. I., Cederbaum, L. S., Gokhberg, K.

The resonant-Auger – interatomic Coulombic decay (ICD) cascade was recently suggested as
an efficient means of controlling the course of the ICD process. Recent theoretical and experimental
works show that control over the energies of the emitted ICD electrons can be achieved
either by varying the photon energy to produce different initial core excitations or by changing
the neighboring species. This work presents a theoretical investigation on the role of the rare-gas
neighbor and clarifies how the latter influences the ICD process. For this purpose, we compare fully
ab initio computed ICD-electron and kinetic energy release spectra following the 2p3/2
→ 4s, 2p1/2
→ 4s and 2p3/2
→ 3d of Ar in ArKr and Ar2. We demonstrate that the presence of the chemically
“softer” partner atom results in an increase in the energies of the emitted ICD electrons, and
also in the appearance of additional ICD-active states. The latter leads to a threefold increase in the
ICD yield for the case of the 2p3/2, 1/2
→ 4s parent core excitations.
journal:Journal of Chemical Physics

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