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          Institute: MPI für Kernphysik     Collection: Physics of Cold Molecular Ions and Ultra-Cold Ensembles     Display Documents



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ID: 204837.0, MPI für Kernphysik / Physics of Cold Molecular Ions and Ultra-Cold Ensembles
Size-Dependent Electron-Impact Detachment of Internally Cold Cn- and Aln- Clusters
Authors:Diner, A.; Toker, Y.; Strasser, D.; Heber, O.; Ben-Itzhak, I.; Witte, P.; Wolf, A.; Schwalm, D.; Rappaport, M.; Bushan, K.; Zajfman, D.
Language:English
Date of Publication (YYYY-MM-DD):2004
Title of Journal:Physical Review Letters
Journal Abbrev.:Phys. Rev. Lett.
Volume:93
Start Page:063402
End Page:063402
Copyright:©2004 The American Physical Society
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:The cross sections for electron detachment of internally cold Cn- and Aln- clusters were measured using an electrostatic ion beam trap fitted with an internal electron target. The measured electron-impact detachment cross sections for the C n-(n = 1-9) clusters exhibit even-odd oscillations reflecting the binding energy trend, namely, higher cross sections for weaker binding. Surprisingly, however, these cross sections increase on the average with cluster size, n, in spite of the increase in electron binding. In contrast, the Aln- (n = 2-5) clusters follow the known scaling laws for electron detachment. We suggest that the size-dependent polarizability of these clusters is responsible for the observed behavior.
External Publication Status:published
Document Type:Article
Affiliations:MPI für Kernphysik/Group D. Schwalm/Atomic and Molecular Physics with Stored Ions (A. Wolf)
External Affiliations:Department of Particle Physics, Weizmann Institute of Science, Rehovot, 76100, Israel
J R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506 USA
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