A NEW APPROACH OF THE SIMS METHOD FOR METAL CLUSTERS

I. Katakuse, T. Ichihara, H. Ito, T. Sakurai and T. Matsuo
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I. Katakuse: Department of Earth and Space Science, Faculty of Science, Osaka University, Machikaneyama-cho, Toyonaka, Osaka 560, Japan
T. Ichihara: Department of Earth and Space Science, Faculty of Science, Osaka University, Machikaneyama-cho, Toyonaka, Osaka 560, Japan
H. Ito: Department of Physics, Faculty of Science, Osaka University, Machikaneyama-cho, Toyonaka, Osaka 560, Japan
T. Sakurai: Department of Physics, Faculty of Science, Osaka University, Machikaneyama-cho, Toyonaka, Osaka 560, Japan
T. Matsuo: Department of Physics, Faculty of Science, Osaka University, Machikaneyama-cho, Toyonaka, Osaka 560, Japan

Surface Review and Letters (SRL), 1996, vol. 03, issue 01, 551-555

Abstract: The size distributions of(CsI)nCs+,$({\rm MgO})_n^+ ({\rm MgO})_n {\rm Mg}^+$, and$({\rm Hg})_n M_j^+$(M:alkali metal,j=1, 2, 3, 4, 5) clusters were obtained using secondary-ion mass spectrometry. The sizes of stable neutral clusters(CsI)nand(Hg)nclusters were determined from the mass spectra of cluster ions(CsI)nCs+and(Hg)nM+. The magic numbers of$({\rm Hg})_n {\rm K}_3^+$clusters were identical to those of van der Waals type clusters. It is believed that the shell closing cluster${\rm K}_3^+$is at the center of complex clusters$({\rm Hg})_n {\rm K}_3^+$. The$({\rm Hg})_n {\rm K}_4^+$clusters were believed to have electronic shell structures from the magic numbers.

Date: 1996
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DOI: 10.1142/S0218625X96001005

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