Complex dynamics variables for molecules and molecular clusters

Abstract

We describe a method to analyse dynamic properties of molecules and molecular clusters. The model involves the change in lifetimes of collective, quasi-stationary excited states of the system under consideration by low energy electron local excitations. Probabilities of desorption-ionisation processes and cluster decomposition are also estimated. The model is based on the quantum multi-particle theory and the exciton or excimol theory for condensed matter and molecules. The energies of excitation have complex values which permit us to take into account the unharmonic character of bond vibrations and the relaxation process. We apply a perturbation theory for excitation analysis describing the possible deviation of molecules or molecular clusters from regular structures. The wave-functions can be taken in their asymptotic form and the dilatation method is used for the complex energy states.