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  Energy band dispersion in photoemission spectra of argon clusters

Förstel, M., Mucke, M., Arion, T., Lischke, T., Barth, S., Ulrich, V., et al. (2011). Energy band dispersion in photoemission spectra of argon clusters. Journal of Electron Spectroscopy and Related Phenomena, 184(3-6), 107-112. doi:doi:10.1016/j.elspec.2010.09.001.

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Förstel, Marko1, 2, Author
Mucke, Melanie1, Author
Arion, Tiberiu1, Author
Lischke, Toralf1, Author
Barth, Silko1, Author
Ulrich, Volker1, Author
Öhrwall, Gunnar3, Author
Björneholm, Olle3, Author
Hergenhahn, Uwe1, Author
Bradshaw, Alexander M.1, 4, Author           
Affiliations:
1Max-Planck-Institut für Plasmaphysik (IPP), EURATOM Association, Boltzmannstr. 2, 85748 Garching, Germany, ou_persistent22              
2Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany, ou_persistent22              
3Division of Molecular and Condensed Matter Physics, Department of Physics and Astronomy, Uppsala University, Box 516, SE-75120 Uppsala, Sweden, ou_persistent22              
4Theory, Fritz Haber Institute, Max Planck Society, ou_634547              

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 Abstract: Using photoemission we have investigated free argon clusters from a supersonic nozzle expansion in the photon energy range from threshold up to 28 eV. Measurements were performed both at high resolution with a hemispherical electrostatic energy analyser and at lower resolution with a magnetic bottle device. The latter experiments were performed for various mean cluster sizes. In addition to the ≈1.5 eV broad 3p-derived valence band seen in previous work, there is a sharper feature at ≈15 eV binding energy. Surprisingly for non-oriented clusters, this peak shifts smoothly in binding energy over the narrow photon energy range 15.5–17.7 eV, indicating energy band dispersion. The onset of this bulk band-like behaviour could be determined from the cluster size dependence.

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Language(s): eng - English
 Dates: 20102010-09-192011
 Publication Status: Published in print
 Pages: 6
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: doi:10.1016/j.elspec.2010.09.001
 Degree: -

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Title: Journal of Electron Spectroscopy and Related Phenomena
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: - Volume / Issue: 184 (3-6) Sequence Number: - Start / End Page: 107 - 112 Identifier: ISSN: 0368-2048
CoNE: https://pure.mpg.de/cone/journals/resource/954925524767