Absorption spectra of small niobium and gold clusters measured by photodepletion of their rare gas van der Waals complexes: some preliminary experiments |
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Authors: | B A Collings K Athanassenas D M Rayner P A Hackett |
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Institution: | 1. Steacie Institute for Molecular Sciences, National Research Council, 100 Sussex Drive, K1A 0R6, Ottawa, Ontario, Canada 2. Department of Physics, University of Konstanz, Postfach 5560, 7750, Konstanz, Germany
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Abstract: | The optical absorption spectra of small niobium clusters have been determined over the wavelength range 260 – 740 nm by photodetaching Krypton atoms from the corresponding neutral van der Waals, vdW, complexes, NbnKrm, n=5–15, m=1–3. Cross sections for small gold clusters were determined by photodetachment experiments oncharged vdW complexes AunXem]+, m=1, 2. The absorption cross sections are observed to increase monotonically with decreasing wavelength. At the long wavelength end of the range, the cross section is practically independent of the cluster nuclearity, n; whereas, at the short wavelength end of the range, the cross section increases monotonically with n. |
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