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Site- and Energy-Selective Low-Energy Electron Emission by X-rays in the Aqueous Phase

Bloß, Dana ; Dupuy, Rémi ; Trinter, Florian ; Unger, Isaak ; Walsh, Noelle LU ; Öhrwall, Gunnar LU orcid ; Golchert, Niklas ; Klassen, Gabriel ; Krone, Adrian and Terao, Yusaku , et al. (2025) In Journal of the American Chemical Society 147(25). p.22115-22120
Abstract

Low-energy-electron emission from resonant Auger final states via intermolecular Coulombic decay (RA-ICD) has previously been described as a promising scenario for controlling radiation damage for medical purposes, but it has so far only been observed in prototypical atomic and molecular van der Waals dimers and clusters. Here, we report the experimental observation of RA-ICD in an aqueous solution. We show that for solvated Ca2+ ions, the emission can be very efficiently controlled by tuning the photon energy of exciting X-rays to inner-shell resonances of the ions. Our results provide the next step from demonstrating RA-ICD in relatively simple prototype systems to understanding the relevance and potential applications of... (More)

Low-energy-electron emission from resonant Auger final states via intermolecular Coulombic decay (RA-ICD) has previously been described as a promising scenario for controlling radiation damage for medical purposes, but it has so far only been observed in prototypical atomic and molecular van der Waals dimers and clusters. Here, we report the experimental observation of RA-ICD in an aqueous solution. We show that for solvated Ca2+ ions, the emission can be very efficiently controlled by tuning the photon energy of exciting X-rays to inner-shell resonances of the ions. Our results provide the next step from demonstrating RA-ICD in relatively simple prototype systems to understanding the relevance and potential applications of ICD in real-life scenarios.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of the American Chemical Society
volume
147
issue
25
pages
6 pages
publisher
The American Chemical Society (ACS)
external identifiers
  • pmid:40513115
  • scopus:105008399166
ISSN
0002-7863
DOI
10.1021/jacs.5c06436
language
English
LU publication?
yes
additional info
Publisher Copyright: © 2025 The Authors. Published by American Chemical Society.
id
2a73c19e-43c7-4a61-9ab6-e378cc6c8768
date added to LUP
2025-12-15 14:10:17
date last changed
2025-12-16 03:00:15
@article{2a73c19e-43c7-4a61-9ab6-e378cc6c8768,
  abstract     = {{<p>Low-energy-electron emission from resonant Auger final states via intermolecular Coulombic decay (RA-ICD) has previously been described as a promising scenario for controlling radiation damage for medical purposes, but it has so far only been observed in prototypical atomic and molecular van der Waals dimers and clusters. Here, we report the experimental observation of RA-ICD in an aqueous solution. We show that for solvated Ca<sup>2+</sup> ions, the emission can be very efficiently controlled by tuning the photon energy of exciting X-rays to inner-shell resonances of the ions. Our results provide the next step from demonstrating RA-ICD in relatively simple prototype systems to understanding the relevance and potential applications of ICD in real-life scenarios.</p>}},
  author       = {{Bloß, Dana and Dupuy, Rémi and Trinter, Florian and Unger, Isaak and Walsh, Noelle and Öhrwall, Gunnar and Golchert, Niklas and Klassen, Gabriel and Krone, Adrian and Terao, Yusaku and Viehmann, Johannes H. and Wülfing, Lasse and Richter, Clemens and Buttersack, Tillmann and Cederbaum, Lorenz S. and Hergenhahn, Uwe and Björneholm, Olle and Ehresmann, Arno and Hans, Andreas}},
  issn         = {{0002-7863}},
  language     = {{eng}},
  month        = {{06}},
  number       = {{25}},
  pages        = {{22115--22120}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{Journal of the American Chemical Society}},
  title        = {{Site- and Energy-Selective Low-Energy Electron Emission by X-rays in the Aqueous Phase}},
  url          = {{http://dx.doi.org/10.1021/jacs.5c06436}},
  doi          = {{10.1021/jacs.5c06436}},
  volume       = {{147}},
  year         = {{2025}},
}