## Vibrational predissociation and intramolecular vibrational energy redistribution three-dimensional quantum dynamics of ArI[sub 2]

A detailed theoretical study of an empirical potential model for ArI[sub 2]([nu][prime]) [yields] Ar + I[sub 2]([nu]<[nu][prime]), with zero total angular momentum, is presented. With a reasonable choice of parameters for the potential, three-dimensional quantum dynamics calculations yield a nonmonotonic variation in the main resonance decay constant with initial I[sub 2] vibrational excitation [nu][prime]. This behavior is attributed to a few-state intramolecular vibrational energy redistribution (IVR) mechanism. The main resonances contain large contributions from zero-order bright' states with [nu][prime] quanta in I[sub 2] and zero-point energy in the van der Waals modes. They also contain varying degrees of dark' statesmore »