Correlation delay time

Fig. V-37. Autocorrelation function with linearly (a) and logarithmically (b) spaced correlation delay times, xcorr...

The photocount correlation function gPl (t) is given by Eq. (10.30), where t is the correlation delay time. 

Referring to figure BLIP. 7 consider electrons from the event under study as well as from other events all arriving at the two detectors. The electrons from the event under study are correlated in time and result in a peak in the time spectrum centred approximately at the delay time. There is also a background level due to events that bear no fixed time relation to each other. If the average rate of tlie background events in each detector is R and i 2> then the rate that two such events will be recorded within time Ax is given by i g, where... 

The intensity of the sum frequency light /sum at a given delay time r between the probe pulse and the fluorescence beam co( is proportional to the correlation function of the fluorescence intensity with the intensity of the probe pulse co ... 

Figure 8.9. Time-resolved fluorescence spectra of 9,10-diphenylanthracene, recorded wi th time-correlated single photon counting, Aa = 360 nm. Parameters gate width and delay time relative to the intensity maximum of the excitation pulse.

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