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Formation of Very Large Gold Superclusters (Clusters of Clusters) as Secondary Ions up to ( A U , ~ by )~~ Secondary Ion Mass Spectrometry H. Feld, A. Leute, D. Rading, and A. Benninghoven* Physikalisches Institut der Universitat Miinster Wilhelm- Klemm-Strasse I O , 0-4400, Miinster, FRG G. Schmid u
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