© Ultrafast Systems LLC /Vernier Software & Technology
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6.2 Kinetic
Analysis
The light-generated species in the suggested experiments are formed on a time scale much
shorter than response time of the Vernier Flash Photolysis Spectrometer (~100 microseconds). Therefore
we are only interested in studying the decay part of kinetic profiles. One important thing to consider when
analyzing the kinetic profiles acquired with Vernier Flash Photolysis Spectrometer is the scattered
excitation light recorded by the photodetector (Figure 8).
-0.2
-0.1
0.0
0.1
0.2
0.3
0.4
0.5
0
5
10
15
I/ mV
Time / ms
Figure 8:
Example of a temporal profile of the scattered excitation light
In Figure 8, it can be seen that the scattered excitation light effect on the kinetic profile diminishes
within the first 150
s. Therefore it is safe to exclude only the first 150
s along with the pre-trigger points
(negative time) from the waveform to be analyzed (Figure 9).
