Argon Nanoclusters with Fivefold Symmetry in Supersonic Gas Jets and Superfluid Helium

作者：Danylchenko O G; Boltnev R E; Khmelenko V V; Kiryukhin V; Konotop O P; Lee D M; Krainyukova N V^*

来源：Journal of Low Temperature Physics, 2017, 187(1-2): 156-165.

DOI：10.1007/s10909-016-1720-8

• Argon nanoclusters
• Multiply twinned particles
• Size-dependent transformation
• Supersonic gas jet
• Impurity-helium solids

In this study argon nanoclusters (800 to 6500 atoms) formed in supersonic gas jets are compared to the nanoclusters stabilized in superfluid helium. High-energy electron and X-ray diffraction methods are utilized. Both techniques allow investigation of isolated clusters. It is shown that the theoretical prediction of the so-called multiply twinned particles with fivefold symmetry, such as icosahedra (ico) and decahedra (dec) is valid in the investigated cluster size interval. Around the point of the expected ico-to-dec size-dependent transformation at a cluster size of 2000 atoms, hexagonal ico and the statistical distribution of structures with a tendency for dec to replace ico are observed. Kinetic reasons, as well as temperature-related effects, could be responsible for the latter observations.

• 出版日期2017-4
• 单位rutgers