Affiliation:
1. Foundation for Research and Technology-Hellas, Institute of Electronic Structure and Laser, P.O. Box 1527, Crete, Heraklion 711 10, Greece
2. Fachbereich Physik, Universität Rostock, Universitätsplatz 3, Rostock 18051, Germany
3. Department of Physics, University of Crete, Heraklion 710 03, Greece
Abstract
We have studied the stability and the structure of doped noble gas cluster ions of the type
M+Xn, (M=In, Al, Na, X=Ar, Kr, Xe) by systematically changing the composition
M/X and observing changes in the magic number patterns appearing in the mass spectra.
When the metal ion radius is comparable to the radius of the noble gas atom, the mass
spectra show the familar icosahedral magic numbers n+ 1=13,19,23,26,29,32,
46, 55,... In constrast, for metal ions with radii significantly smaller than the noble
gas atoms, we observe a new series of magic numbers n + 9, 11, 17, 21,24, 26,... This
series converts into the icosahedral one for larger clusters. Using a simple hard sphere
packing model, we show that this new series of magic numbers is consistent with a cluster
growth sequence which is based on a capped square antiprism (CSA) geometrical
structure of the clusters.
Subject
Spectroscopy,Biochemistry,Atomic and Molecular Physics, and Optics
Cited by
43 articles.
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