A Monte Carlo simulation program was created which generated realistic positron lifetime spectra. It achieved this by simulating the diffusion, trapping and annihilation of positrons in solids. It was possible to define defect structures (type, size, concentration, spatial distribution), behavior of positrons in each trap state (trapping-rate, lifetime, effective range of interaction) and spectrometer performance (time-resolution, background). The program was shown to be very useful for assessing the accuracy of fitted parameter values (lifetimes, intensities) extracted from photoluminescence spectra. It was also shown to be useful for quantifying the effect that defect spatial distributions had upon the positron trapping fraction.

Simulated Positron Lifetime (SimPL) - a Monte Carlo Simulator for Positron Diffusion, Trapping, and Lifetime Spectra. D.W.Lawther, A.Gaudin, A.Stewart: Physica Status Solidi C, 2007, 4[10], 4007-10