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  Detection of Negative Charge Carriers in Superfluid Helium Droplets: The Metastable Anions He*(-) and He-2*(-)

Mauracher, A., Daxner, M., Postler, J., Denifl, S., Huber, S. E., Scheier, P., et al. (2014). Detection of Negative Charge Carriers in Superfluid Helium Droplets: The Metastable Anions He*(-) and He-2*(-). Journal of Physical Chemistry Letters, 5(14): 10.1021/jz500917z, pp. 2444-2449. doi:10.1021/jz500917z.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-0F1F-0 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-0F20-A
Genre: Journal Article

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 Creators:
Mauracher, A., Author
Daxner, M., Author
Postler, J., Author
Denifl, S., Author
Huber, S. E., Author
Scheier, P., Author
Toennies, J. P.1, Author              
Affiliations:
1Emeritus Group Molecular Interactions, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2063297              

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 Abstract: 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.

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Language(s): eng - English
 Dates: 2014-07-17
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: eDoc: 711942
DOI: 10.1021/jz500917z
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Title: Journal of Physical Chemistry Letters
Source Genre: Journal
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Pages: - Volume / Issue: 5 (14) Sequence Number: 10.1021/jz500917z Start / End Page: 2444 - 2449 Identifier: -