<div class="csl-bib-body">
<div class="csl-entry">Niggas, A. (2024, February 1). <i>Using charge exchange dynamics of highly charged ions to investigate material structures</i> [Presentation]. Seminar Condensed Matter Physics 2024, Bielefeld, Germany.</div>
</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/193637
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dc.description.abstract
Ions in high charge states can store several tens of keV of potential energy composed by the sum of binding energies of all missing electrons. When approaching a material, these highly charged ions start to resonantly capture electrons into high-n shells several Ångströms above the surface. Subsequently, these electrons can deexcite through
radiative and non-radiative pathways, like Auger-Meitner decay. Close to the material atoms, a two-centre Auger process also contributes to the deexcitation of the projectile,
namely the interatomic Coulombic decay (ICD) [1]. ICD is a strongly distance-dependent process and highly efficient for small interatomic separations [2]. This makes the charge exchange behaviour of the ion ultrafast and results in almost complete neutralisation within a (few) monolayer(s) [3]. The ion exit charge state is thus an ideal tool to assess parameters like material thickness: Thin samples lead to higher exit charge states than thicker samples; pores in a sample lead to even higher charge states as the ion-material distance increases and ICD becomes less effective. In our setup, we, therefore, record the exit charge states of highly charged ions after transmission through atomically thin materials [4,5]. Together with a Monte-Carlo-based code simulating the exit charge state pattern for a given sample structure [6], we can use this technique for (indirect) materials analysis. In this talk, I will discuss how we can apply our technique to investigate the structures of carbon nanomembranes.
en
dc.language.iso
en
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dc.subject
ion surface collisions
en
dc.subject
highly charged ions
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dc.title
Using charge exchange dynamics of highly charged ions to investigate material structures
en
dc.type
Presentation
en
dc.type
Vortrag
de
dc.type.category
Presentation
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tuw.researchTopic.id
M1
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tuw.researchTopic.name
Surfaces and Interfaces
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tuw.researchTopic.value
100
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tuw.linking
https://indico.physik.uni-bielefeld.de/event/122/
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tuw.publication.orgunit
E134-03 - Forschungsbereich Atomic and Plasma Physics
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tuw.author.orcid
0000-0002-5838-5789
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tuw.event.name
Seminar Condensed Matter Physics 2024
en
tuw.event.startdate
01-02-2024
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tuw.event.enddate
01-02-2024
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tuw.event.online
On Site
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tuw.event.type
Event for scientific audience
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tuw.event.place
Bielefeld
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tuw.event.country
DE
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tuw.event.institution
Universität Bielefeld
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tuw.event.presenter
Niggas, Anna
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wb.sciencebranch
Physik, Astronomie
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wb.sciencebranch.oefos
1030
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wb.sciencebranch.value
100
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item.languageiso639-1
en
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item.openairetype
conference presentation
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item.grantfulltext
none
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item.fulltext
no Fulltext
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item.cerifentitytype
Publications
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item.openairecristype
http://purl.org/coar/resource_type/R60J-J5BD
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crisitem.author.dept
E134-03 - Forschungsbereich Atomic and Plasma Physics
