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Magic sizes of cationic and protonated argon clusters
Stockholm University, Faculty of Science, Department of Physics. Universit├Ąt Innsbruck, Austria.
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Number of Authors: 52018 (English)In: Physical Review A: covering atomic, molecular, and optical physics and quantum information, ISSN 2469-9926, E-ISSN 2469-9934, Vol. 98, no 2, article id 022519Article in journal (Refereed) Published
Abstract [en]

There has long been a discrepancy between the size distributions of Ar-n(+) clusters measured by different groups regarding whether or not magic numbers appear at sizes corresponding to the closure of icosahedral (sub-) shells. We show that the previously observed magic cluster size distributions are likely the result of an unresolved ArnH+ component, i.e., from protonated argon clusters. We find that the proton impurity gives cluster geometries that are much closer to those for neutral rare-gas clusters, which are known to form icosahedral structures, than for the pure cationic clusters, explaining why the mass spectra from protonated argon clusters better matches these structural models. Our results thus show that even small impurities, e.g., a single proton, can significantly influence the properties of clusters.

Place, publisher, year, edition, pages
2018. Vol. 98, no 2, article id 022519
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Physical Sciences
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URN: urn:nbn:se:su:diva-160066DOI: 10.1103/PhysRevA.98.022519ISI: 000443093900004OAI: oai:DiVA.org:su-160066DiVA, id: diva2:1254028
Available from: 2018-10-08 Created: 2018-10-08 Last updated: 2018-10-08Bibliographically approved

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