Evidence for cluster shape effects on the kinetic energy spectrum in thermionic emission.
Experimental kinetic energy release distributions obtained for the thermionic emission from C(n) (-) clusters, 10< or =n< or =20, exhibit significant non-Boltzmann variations. Using phase space theory, these different features are analyzed and interpreted as the consequence of contrasting shapes in the daughter clusters; linear and nonlinear isomers have clearly distinct signatures. These results provide a novel indirect structural probe for atomic clusters associated with their thermionic emission spectra.
LASIM, Université Claude Bernard Lyon 1, 43 Blvd. du 11 Novembre 1918, Villeurbanne Cedex, France. fcalvo@lasim.univ-lyon1.fr
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Calvo
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Lépine
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Baguenard
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Pagliarulo
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Concina
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Bordas
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Parneix