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          Institute: MPI für Dynamik und Selbstorganisation     Collection: Max-Planck-Fellow Zippelius     Display Documents



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ID: 711942.0, MPI für Dynamik und Selbstorganisation / Max-Planck-Fellow Zippelius
Detection of Negative Charge Carriers in Superfluid Helium Droplets: The Metastable Anions He*(-) and He-2*(-)
Authors:Mauracher, A.; Daxner, M.; Postler, J.; Denifl, S.; Huber, S. E.; Scheier, P.; Toennies, J. P.
Language:English
Date of Publication (YYYY-MM-DD):2014-07-17
Title of Journal:Journal of Physical Chemistry Letters
Volume:5
Issue / Number:14
Start Page:2444
End Page:2449
Sequence Number of Article:10.1021/jz500917z
Review Status:not specified
Audience:Not Specified
Abstract / Description:Helium droplets provide the possibility to study phenomena at the very low temperatures at which quantum mechanical effects are more pronounced and fewer quantum states have significant occupation probabilities. Understanding the migration of either positive or negative charges in liquid helium is essential to comprehend charge-induced processes in molecular systems embedded in helium droplets. Here, we report the resonant formation of excited metastable atomic and molecular helium anions in superfluid helium droplets upon electron impact. Although the molecular anion is heliophobic and migrates toward the surface of the helium droplet, the excited metastable atomic helium anion is bound within the helium droplet and exhibits high mobility. The atomic anion is shown to be responsible for the formation of molecular dopant anions upon charge transfer and thus, we clarify the nature of the previously unidentified fast exotic negative charge carrier found in bulk liquid helium.
External Publication Status:published
Document Type:Article
Communicated by:Folkert Mueller-Hoissen
Affiliations:MPI für Dynamik und Selbstorganisation/Molekulare Wechselwirkung
External Affiliations:Univ Innsbruck, Inst Ionenphys & Angew Phys, Technikerstr 25-3, A-6020 Innsbruck, Austria.
Identifiers:DOI:10.1021/jz500917z
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