Half-Life Calculator

Created by Davide Borchia
Last updated: Jun 08, 2022
This calc assumes exponential decay of fluorescence to determine the half-life and lifetime (which is defined as 1/[decay constant], and corresponds to decay to a level of 1/e (~36.8%). It is not suitable for biexponential or other decay functions. "t=0" should be taken at a point where the excitation source is completely off.
Davide Borchia
Formula for half-life, given the decay constant and the mean lifetime
Initial quantity (N(0))
Half-life time (T)
sec
Total time
sec
Remaining quantity (N(t))
Decay constant (λ)
/
per s
Mean lifetime (τ)
sec
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