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Energy band dispersion in photoemission spectra of argon clusters
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Soft X-Ray Physics.
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2011 (English)In: Journal of Electron Spectroscopy and Related Phenomena, ISSN 0368-2048, E-ISSN 1873-2526, Vol. 184, no 3-6, 107-112 p.Article in journal (Refereed) Published
Abstract [en]

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 approximate to 15eV broad 3p-derived valence band seen in previous work, there is a sharper feature at approximate to 15eV 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.

Place, publisher, year, edition, pages
2011. Vol. 184, no 3-6, 107-112 p.
Keyword [en]
Cluster, Band structure, Argon, Photoelecton spectroscopy
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:uu:diva-156238DOI: 10.1016/j.elspec.2010.09.001ISI: 000292173400006OAI: oai:DiVA.org:uu-156238DiVA: diva2:431408
Available from: 2011-07-19 Created: 2011-07-18 Last updated: 2017-12-08Bibliographically approved

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Soft X-Ray PhysicsSurface and Interface Science
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