Molecular clusters, decay modes

Other Decay Modes in Atomic and Molecular Clusters... 

The origin of the slow mode, whose decay rate is molecular weight dependent, has been attributed to a reptation-like mechanism [39,40] or to long-range electrostatic interactions [41] or to some clusters or to temporal domains resulting from chain entanglements [42,43],... 

Class B clusters are also weakly bound, but their constituent molecular units have large density of states with low vibrational frequencies which approach those of the van der Waals modes. Thus, these clusters are much more likely to decay via rapid IVR followed by a statistical dissociation. At least this is their behavior on the electronically excited potential surface. Studies in the infra-red have not been carried out. Among the well studied systems are p-difluorobenzene—X (Tiller et al., 1989 Hye-Keun et al., 1988 Butz et al., 1986) and stilbene—X dimers, where A is a rare gas (Semmes et al., 1990 Khundkar et al., 1983 DeHaan et al., 1989). 

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