Size-dependent K-edge EXAFS study of the structure of free Ar clusters

被引：157

作者：

Kakar, S ^{[1
]}

Bjorneholm, O ^{[1
]}

Weigelt, J ^{[1
]}

deCastro, ARB ^{[1
]}

Troger, L ^{[1
]}

Frahm, R ^{[1
]}

Moller, T ^{[1
]}

Knop, A ^{[1
]}

Ruhl, E ^{[1
]}

机构：

[1] FREE UNIV BERLIN, INST THEORET & PHYS CHEM, D-14195 BERLIN, GERMANY

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 78卷 / 09期

关键词：

D O I：

10.1103/PhysRevLett.78.1675

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Extended x-ray absorption fine structure (EXAFS) spectroscopy is used to study the size-dependent structural evolution of free clusters. K-edge EXAFS data are obtained for Ar clusters in beams having mean cluster size ranging from 17 to 2900 atoms per cluster. EXAFS analysis yields size-dependent features which indicate the presence of an fee structure at (N) greater than or equal to 200. It has been proposed in the literature that small rare-gas clusters have an icosahedral structure. The transition of this structure to the experimentally observed fee lattice of rare-gas solids has been of long-standing interest and debate. The implications of our results are discussed in this light.

引用

页码：1675 / 1678

页数：4

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