Van der Waals molecules predissociation

Davis and Gray then successfully extended Davis s analysis to van der Waals molecule predissociation reactions such as... 

Figure 19. A schematic plot of the ideal bottlenecks on the Poincare surface of section for van der Waals molecule predissociation. R is the van der Waals bond length and P is the conjugate momentum. 5i is the intramolecular bottleneck dividing surface and S2 is the intermoleculear bottleneck dividing surface.

All the analyses of van der Waals molecule predissociation begin with the same system Hamiltonian. We will denote the mass-weighted van der Waals coordinates by r. Then, neglecting the influence of rotation on the system dynamics, the Hamiltonian is... 

We now consider some of the successes and some of the failures of the perturbation theory analysis of van der Waals molecule predissociation. 

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