FAST AND ACCURATE ANALYSIS OF MOLECULAR RELAXATION PROCESSES ON HIGH-INTENSITY EXCITATION - NONLINEAR-ANALYSIS WITH A CONVOLVED AUTOREGRESSIVE MODEL

A novel method for the analysis of the decay dynamics of densely produ ced, excited and ionic states is proposed, which makes it possible to estimate the rate constants of unimolecular and bimolecular processes from a transient emission or absorption curve. This method is based on a convolved autoregressive model, which is a linear form with respect to unknown model parameters, even for bimolecular excited state annih ilation and ion recombination processes, so that the computation time is much shorter than that of a conventional non-linear least-squares f itting technique. The method can be extended to the analysis of a bimo lecular process during irradiation by excitation light, which cannot b e achieved using conventional techniques. (C) 1997 Elsevier Science S. A.