Phys. Rev. A 62, 063201 (2000) [6 pages]Negative-ion formation in collisions of low-energy electrons with neutral sodium clustersReceived 3 April 2000; published 7 November 2000 Electron collisions with neutral sodium clusters in the 0–3 eV energy range have been studied in a crossed-beam geometry, and direct evidence for the formation of Nan- anions has been obtained. The dependence of ion formation efficiency on the electron energy is well represented by the Langevin cross section, suggesting that the electrons are captured by the polarization field of the cluster. This is consistent with the highly polarizable nature of alkali-metal clusters. © 2000 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.62.063201
DOI:
10.1103/PhysRevA.62.063201
PACS:
36.40.Wa, 34.80.Ht
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