Precise measurement and calculation of coincidence summing corrections for point and linear sources

Point sources of 60Co, 133Ba, 134Cs and 152Eu, calibrated at Physikalisch-Technische Bundesanstalt were measured in 13 positions on the axis of a 50% relative efficiency p-type detector. The peak and total efficiencies were calibrated using single photon emitting nuclides. Precise experimental values of the coincidence summing corrections were evaluated in each geometry. Synthetic linear source data, as well as the corresponding peak and total efficiency curves, were prepared using the dependence of the count rates on the position of the emitting point. The coincidence summing corrections for the linear sources were computed, analyzed with respect to different approximations and compared with simulations carried out with GESPECOR. - Highlights: ► Precise measurement of coincidence summing corrections (CSC) for point sources (PS). ► Precise computations of the CSC for PS of 60Co, 133Ba, 134Cs and 152Eu. ► Evaluation of CSC for linear sources (LS) based on experimental PS measurements. ► Computation of CSC for LS by integration of efficiency dependence on coordinate. ► Comparison with approximate methods and with Monte Carlo simulation using GESPECOR.