Eur. Phys. J. D 52, 183-185 (2009)
https://doi.org/10.1140/epjd/e2008-00269-9

Photoabsorption resonances of Na ₂₀, Na ₂₁Cl and Na ₂₂Cl ₂ clusters

Department of Physics and Astronomy, University of Southern California, Los Angeles, California, 90089-0484, USA

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Received: 19 September 2008
Published online: 24 January 2009

Abstract

Plasma resonance profiles in the visible part of the spectrum were measured by photoabsorption spectroscopy for the clusters Na₂₀, Na₂₁Cl and Na₂₂Cl₂ in a beam. The resonance positions in Na₂₀ and Na₂₁Cl are close, suggesting that the Cl^- ion does not locate at the center of the metallic droplet and does not strongly modify the effective valence electron density. The spectrum of Na₂₂Cl₂ is noticeably dissimilar to the other two, raising the possibility of structural differences and/or incomplete charge transfer.