Academic Journal
High-resolution electron–multi-ion coincidence set-up for gas-phase experiments in the tender and hard X-ray range
| Title: | High-resolution electron–multi-ion coincidence set-up for gas-phase experiments in the tender and hard X-ray range |
|---|---|
| Authors: | Edwin Kukk, Regis Vacheresse, Iyas Ismail, Tatiana Marchenko, Renaud Guillemin, Maria Novella Piancastelli, Marc Simon, Oksana Travnikova |
| Source: | J Synchrotron Radiat Journal of Synchrotron Radiation, Vol 32, Iss 4, Pp 1017-1027 (2025) |
| Publisher Information: | International Union of Crystallography (IUCr), 2025. |
| Publication Year: | 2025 |
| Subject Terms: | Crystallography, x-ray induced fragmentation, deep-core ionization, QD901-999, Nuclear and particle physics. Atomic energy. Radioactivity, multi-particle coincidence spectroscopy, auger cascades, QC770-798, Research Papers, gas-phase ionization processes |
| Description: | The MUSTACHE setup (MUlti-STep photofragmentation studies by Auger electron–ion Coincidences using High Energy photons) is a high-resolution electron–multi-ion coincidence system optimized for gas-phase experiments in the tender (∼2–10 keV) and hard (>5 keV) X-ray range. The system integrates a high-resolution hemispherical electron analyzer with a Wiley–McLaren-type ion time-of-flight (TOF) spectrometer, enabling coincidence measurements of Auger electrons and high-energy photoelectrons. Designed to overcome challenges in high-energy electron detection while maintaining excellent energy resolution, the setup covers a broad kinetic energy range up to 5 keV, allowing investigation of hard-X-ray-induced Auger cascades in molecules containing high-Z elements, where initial fluorescence decay is followed by Auger processes within this 5 keV detection window. The ion TOF spectrometer provides high-resolution ion mass and momentum analysis, essential for studying light and fast ions generated by deep-core ionization. System capabilities are demonstrated through test measurements on benchmark atomic and molecular systems, such as argon, nitrogen and carbon disulfide. These measurements demonstrate energy-resolved high-kinetic-energy photoelectron–ion coincidences and momentum-resolved multi-ion coincidences following deep-core ionization and Coulomb explosion. MUSTACHE enables investigations into deep-core ionization, Auger cascade processes and Coulomb explosion dynamics in isolated gas-phase species, offering insights into fundamental ionization and fragmentation processes. These results demonstrate that the MUSTACHE setup is a powerful tool for high-resolution electron–ion coincidence spectroscopy, extending advanced coincidence techniques into the hard X-ray regime and providing unprecedented opportunities for studying high-energy X-ray-induced phenomena. |
| Document Type: | Article Other literature type |
| ISSN: | 1600-5775 |
| DOI: | 10.1107/s1600577525004862 |
| Access URL: | https://doaj.org/article/f0fd0983415d47b2b58495143271b50d |
| Rights: | CC BY URL: http://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited. |
| Accession Number: | edsair.doi.dedup.....3adf50d4a55877c1d038a983c002103c |
| Database: | OpenAIRE |
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