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What is the meaning of lifetime measurement?

2006/05/04 by Christophe Jouvet, Gilles Grégoire, Jouvet, Christophe +4
Chemistry · Engineering · Physics and Astronomy · #Atomic and Molecular Clusters (physics.atm-clus) #Chemical Thermodynamics and Molecular Structure #FOS: Physical sciences #Molecular Junctions and Nanostructures #Various Chemistry Research Topics #physics.atm-clus

paper · pdf · doi:10.48550/arxiv.physics/0605043

arxiv created 2006/05/04 · openalex publication_date 2006/05/04 · arxiv updated 2016/08/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

The lifetime measurement of molecular excited state has been the subject of many papers and experiments. Very often the experimental data are fitted by single or bi exponential decays which in many case is the best fit that can be done owing the signal to noise ratio. The times constants obtained from these fit are often discussed in term of one species associated with one lifetime: depending on the studied system, the species can be one type of molecule, one isomer from a given molecule or local environment. How justified is this assumption?

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