PALSFIT

PALS fit3 is a computer program for the analysis of positron lifetime spectra (measured by positron annihilation lifetime spectroscopy, PALS). PALS fit3 is based on the previous PATFIT and PALS fit programs, which have been used extensively by the positron annihilation community. PALS fit3 is the most recent update of PALS fit with improved graphics output... PALS fit3 is composed of two modules for fitting of positron lifetime spectra, PositronFit and ResolutionFit. In both fitting modules a model function will be fitted to a measured lifetime spectrum. This model function consists of a function representing the physics of the positron decay convoluted with the experimental time resolution function, plus a constant background. The 'physics function' consists of a sum of decaying exponentials each of which may be broadened by convolution with a log-normal distribution. The time resolution function is described by a sum of Gaussians which may be displaced with respect to each other...