Institute of Theoretical Physics · Faculty of Mathematics and Physics, Charles University
Phys. Rev. A 101(3), 033402 (2020)
In this work we investigated the competition between the local Auger decay and core-level interatomic Coulombic decay (ICD) processes in core ionized rare-gas dimers. We computed the respective partial decay widths for the 4d vacancy in Xe-2, XeKr, and XeAr, as well as for the 3d vacancy in Kr-2. We found that the efficiency of ICD is strongly increased with decreasing interatomic distance and decreasing energy transfer in the decay step. The ICD-to-Auger ratio in the Franck-Condon region, where the decay occurs, is at most 0.26\%. However, it reaches a few percentage points in larger clusters and becomes amenable for experimental observation. The small value of the branching ratio is due to large interatomic distances in the dimers (4-4.4 angstrom). Our results also indicate, in accordance with previous measurements, that in hydrogen-bonded and microsolvated clusters, where the distances between the monomers are 2-3 angstrom, core-level ICD should become an important pathway for charge redistribution following the absorption of hard X-rays.
@article{UTF803,
author = {Liping Liu, Přemysl Kolorenč, and Kirill Gokhberg},
title = {{Efficiency of core-level interatomic Coulombic decay in rare-gas dimers}},
journal = {Phys. Rev. A},
volume = {101},
number = {3},
pages = {033402},
year = {2020},
doi = {10.1103/PhysRevA.101.033402},
}