Fig. 1

Stretched exponentials. a Population and intensity decays for the stretched exponential function with τ_SE = 100 μs and β = 0.7. The blue-red dashed line is exp[−(λt)^β]. If this represents the population decay, then the intensity decay will be given by the blue line. If exp[−(λt)^β] is the intensity decay, then the population decay is shown with the red line. b The corresponding rate distributions