Self-attenuation and coincidence-summing corrections calculated by Monte Carlo simulations for gamma-spectrometric measurements with well-type germanium detectors

A Monte Carlo simulation package for the computation of the full-energy peak efficiency, self-attenuation correction factors and coincidence-summing corrections has been developed to assist in the calibration of well-type germanium detector measurements. Due to the almost 4π solid angle for this measurement geometry, particularly high coincidence-summing effects occur in the case of multi-photon emitting nuclides. Besides pair coincidences, the correction terms required to describe higher order coincidences have been included in the computation of the coincidence-summing effects. A general algorithm for self-attenuation calculations, working accurately as well in the case of high attenuating media, has been implemented. The computed results are in good agreement with the experimental data.