Lifetimes of collective resonance states (excimols) in polyatomic regular type molecules and clusters

(Received 10 December 1993, accepted 4 February 1994)

Abstract
A model to estimate lifetimes of excited collective resonance states (excimols) for large biomolecules or clusters, which have a regular or close to regular structure, is presented. These collective excited states arise due to resonance excitation of one or a few bonds in the constituents of the system. The model is based on the quantum multi-particle theory and the exciton or the excimol theory for the condensed matter and molecules. The spectral analysis for non-self-adjoined energy operators is used in the model. As an example, lifetimes are calculated for one-dimensional chain-like polyatomic molecules and for clusters formed by such molecules. The resulting lifetimes of the entire excitation are longer than the lifetimes of the initial trigger excitation.