Software for positron annihilation

This page contains software for positron annihilation spectroscopy developed in the Positron annihilation group at The Charles University in Prague
PLRF code for fitting of positron lifetime spectra


Main features:
  • Description of the PLRF code can be found in the paper
    J. Čížek, Acta Physica Polonica A, 137, 177-187 (2020) .
  • Multiple positron lifetime spectra can be fitted simultaneously.
  • Positronium (Ps) contribution is considered as a double exponential component consisting of short lived para-positronium (p-Ps) and long lived ortho-positronium (o-Ps) component. Ratio of o-Ps and p-Ps contribution can be constrained.
  • Several models were implemented into the PLRF code:
    • independent exponential components
    • simple trapping model
    • diffusion trapping model.
    Physically relevant parameters of the model are varied to get best agreement with experimental positron lifetime spectra.
  • download
cmfit code for Digital Doppler broadening spectroscopy


Main features:
  • analysis of waveforms from HPGe detectors sampled by digitizers.
  • energy calibration
  • elimination of distorted waveforms using digital filters
  • construction of 1D and 2D energy spectra