University of Oulu

Roos, A. H., Eland, J. H. D., Andersson, J., Squibb, R. J., Koulentianos, D., Talaee, O., & Feifel, R. (2018). Abundance of molecular triple ionization by double Auger decay. Scientific Reports, 8(1).

Abundance of molecular triple ionization by double Auger decay

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Author: Roos, A.. Hult1; Eland, J. H. D.2,1; Andersson, J.1;
Organizations: 1Department of Physics, University of Gothenburg, Origovägen 6B, 412 58, Gothenburg, Sweden
2Department of Chemistry, Physical and Theoretical Chemistry Laboratory, Oxford University, South Parks Road, Oxford, OX1 3QZ, United Kingdom
3Sorbonne Université, CNRS, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005, Paris Cedex 05, France
4Nano and Molecular Systems Research Unit, University of Oulu, P.O. Box 3000, University of Oulu, FI-90014, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 1.3 MB)
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Language: English
Published: Springer Nature, 2018
Publish Date: 2019-06-18


Systematic measurements of electron emission following formation of single 1s or 2p core holes in molecules with C, O, F, Si, S and Cl atoms show that overall triple ionization can make up as much as 20% of the decay. The proportion of triple ionization is observed to follow a linear trend correlated to the number of available valence electrons on the atom bearing the initial core hole and on closest neighbouring atoms, where the interatomic distance is assumed to play a large role. The amounts of triple ionization (double Auger decay) after 1s or 2p core hole formation follow the same linear trend, which indicates that the hole identity is not a crucial determining factor in the number of electrons emitted. The observed linear trend for the percentage of double Auger decay follows a predictive line equation of the form DA = 0.415 · Nve + 5.46.

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Series: Scientific reports
ISSN: 2045-2322
ISSN-E: 2045-2322
ISSN-L: 2045-2322
Volume: 8
Article number: 16405
DOI: 10.1038/s41598-018-34807-8
Type of Publication: A1 Journal article – refereed
Field of Science: 114 Physical sciences
Funding: This work has been financially supported by the Swedish Research Council (VR) and the Knut and Alice Wallenberg Foundation, Sweden. We thank the Helmholtz Zentrum Berlin for the allocation of synchrotron radiation beam time. The research leading to this result has been supported by the project CALIPSOplus under the Grant Agreement 730872 from the EU Framework Programme for Research and Innovation HORIZON 2020.
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