Control over the Structure of Clusters Generated in Supersonic Flow
Clusters of a variety of volatile substances have been generated in flow with carrier gases through a miniature Laval nozzle. Cluster structures were investigated by electron diffraction and found to be liquid-like in some cases, crystalline in others. Solid clusters tended to occur in experiments with substances exhibiting plastic crystalline phases. In a. number of examples the cluster structure could be controlled by the flow conditions. Factors governing the type of cluster formed are discussed.
KeywordsCluster Temperature Laval Nozzle Supersonic Expansion Liquid Cluster Solid Cluster
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