Multichannel chemical clusters

K. Takatsuka, Temperature, Geometry, and Variational Stmcture in Microcanonical Ensemble for Stmctural Isomerization Dynamics of Clusters A Multichannel Chemical Reaction Beyond the Transition-State Concept, Adv. Chem. Phys. Part B 130, 25 (2005). 

TEMPERATURE, GEOMETRY, AND VARIATIONAL STRUCTURE IN MICROCANONICAL ENSEMBLE FOR STRUCTURAL ISOMERIZATION DYNAMICS OF CLUSTERS A MULTICHANNEL CHEMICAL REACTION BEYOND THE TRANSITION-STATE CONCEPT... 

For a single-channel problem, only one term in the sum in Eq. (56) is to be considered. On the other hand, it is not unusual for multichannel chemical reactions to have a multiexponential form of reaction probability. Reduction to a single exponential form can depend on individual cases under study. For our cluster system, in which various isotropic properties dominate due to the identical particle composition (see Ref. 39), it is quite likely that there are very many critical points that are topologically equivalent or energetically similar to each other. In these cases, averaging should work. In the two familiar means over variables (X i = 1,2,..., M ... 

Taking M7 cluster as an illustrative example, we have reviewed a novel statistical property of isomerization dynamics in the liquid-like phase, which is a prototype of the high-energy multichannel chemical reaction. We project that studies of chemical reaction will be more and more aiming at such multichannel reactions as dissociation dynamics in electron plasma. 

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