A computer investigation of the stability of clusters of substitutional xenon atoms in copper shows that xenon clusters are energetically unstable in the absence of adjacent vacancies in the surrounding copper lattice. The stability of various clusters increases as the ratio of vacancies to xenon atoms increases. The efficiency of the stabilization due to the vacancies is markedly affected by the geometrical distribution of the vacancies in the xenonvacancy clusters.Die Stabilitiit von substitutionellen Xenon-Atom-Clustern in Kupfer wurde mit Hilfe einer elektronischen Rechenanlage untersucht. Es ergab sich, daO die Xenon-Cluster ohne die gleichzeitige Anwesenheit von den Clustern angegliederten Leerstellen instabil gegen den Zerfall in isolierte Defekte sind. Die Stabilitiit der verschiedenen Cluster ist um so groOer, je groOer das Verhiiltnis von Leerstellen zu Xenon-Atomen ist. Die stabilisierende Wirkung der Leerstellen hiingt wesentlich von ihrer riiumlichen Verteiliing ab.
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