Fast and accurate analysis of molecular relaxation processes on high-intensity excitation: Non-linear analysis with a convolved autoregressive model

Keiji Sasaki*, Jun Ichi Hotta, Hiroshi Masuhara

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

A novel method for the analysis of the decay dynamics of densely produced, 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 annihilation and ion recombination processes, so that the computation time is much shorter than that of a conventional non-linear least-squares fitting technique. The method can be extended to the analysis of a bimolecular process during irradiation by excitation light, which cannot be achieved using conventional techniques.

Original languageEnglish
Pages (from-to)21-25
Number of pages5
JournalJournal of Photochemistry and Photobiology A: Chemistry
Volume107
Issue number1-3
DOIs
StatePublished - 15 Jul 1997

Keywords

  • Autoregressive model
  • High-intensity excitation
  • Molecular relaxation process

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