Doubly charged clusters - neutral atom charge transfer: the role of the Coulombic repulsion |
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Authors: | C Bréchignac Ph Cahuzac B Concina J Leygnier |
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Institution: | (1) Laboratoire Aimé Cotton, batiment 505, Université Paris-Sud, 91405 Orsay Cedex, France, FR |
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Abstract: | We have studied experimentally the collisional charge transfer between a neutral atom and a multicharged metal-atom cluster.
The charge transfer cross section measured for Na 31
+ + + Cs is in the range of 400 ?2. The time-of-flight mass analysis of the singly charged collision products demonstrates that an energy of about 0.5 eV is
deposited in the cluster fragment during the charge transfer collision. This effect can be interpreted as a charge transfer
to an excited state of the metal cluster. The measured cross section for Na 31
+ + + Cs is larger than the one for Na 31
+ + Cs collisions. This difference between these two systems is due to the existence, for the first one, of a Coulombic repulsion
term in the collision output channel.
Received 24 October 2000 |
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Keywords: | PACS 36 40 Cg Electronic and magnetic properties of clusters – 36 40 Jn Reactivity of clusters |
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