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Thermionic Emission from Hot Tungsten Clusters

Published online by Cambridge University Press:  28 February 2011

T. Leisner ,
K. Athanassenas ,
O. Kandler ,
D. Kreisle ,
E. Recknagel  and
Olof Echt
T. Leisner
Affiliation:
University of Konstanz, Physics Dept., 7750 Konstanz, Germany
K. Athanassenas
Affiliation:
University of Konstanz, Physics Dept., 7750 Konstanz, Germany
O. Kandler
Affiliation:
University of Konstanz, Physics Dept., 7750 Konstanz, Germany
D. Kreisle
Affiliation:
University of Konstanz, Physics Dept., 7750 Konstanz, Germany
E. Recknagel
Affiliation:
University of Konstanz, Physics Dept., 7750 Konstanz, Germany
Olof Echt
Affiliation:
University of New Hampshire, Physics Dept., Durham, NH 03824
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Abstract

We observe thermionic emission from tungsten clusters Wn, n ≥ 5, following excitation by a Q-switched Nd:YAG laser. The ion yield from this process dominates over prompt ionization if the laser fluence is chosen properly. Clusters originating from thermionic emission are significantly colder than expected if evaporative cooling would prevail.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 206: Symposium G – Clusters and Cluster-Assembled Materials , 1990 , 259
Copyright
Copyright © Materials Research Society 1991

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References

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