Abstract
The statistical properties of single-photon time-correlated data have been investigated. It appears that the counts per channel (CPC) are not Poisson distributed and are strongly correlated as the total number of counts (TNC) increases. Actually, due to the jitter of the time-measuring device, the probability law of the CPCs is a compound Poisson distribution. Any method of deconvolution should take this fact into account. In this paper, we propose an iterative reconvolution procedure based on a χ 2 test using the covariance matrix. The latter is obtained from a sample of 30 decays. The χ 2 values and the recovered fluorescence lifetimes then depend only slightly on the TNC, thus avoiding the pitfall of artificially multiplying the number of exponential components in order to obtain a good deconvolution fit.
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