Abstract
Photoabsorption spectra of free and deposited NaCl clusters of up to 50 molecules are presented. The NaCl cluster films were produced using a method of cluster deposition. NaCl clusters covered with an Ar layer were produced by a pickup technique and then deposited on a cold gold substrate. Multiple-scattering oscillations in the Na K-edge absorption spectra allowed the determination of the bond length development of NaCl clusters with size. In addition, the spectra were compared with more advanced full-order multiple-scattering calculations. A comparison of the experimentally determined bond length with that calculated using a simple electrostatical model, assuming only a Coulomb interaction and a Born-Meyer-type repulsion of the ions, shows reasonable agreement.
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