Equivalence of computer codes for calculation of coincidence summing correction factors

• Measured and calculated true coincidence corrections differ in recent study.
• We checked for equivalence of computer codes that can perform such calculations.
• Codes compared with each other for a set of well-defined detector and sample models.
• Satisfactory agreement between the codes for a p-type detector model.
• Large differences for an n-type detector model and X-ray emitting radionuclides.

The aim of the study was to check for equivalence of computer codes that can perform calculations of true coincidence summing correction factors. All calculations were performed for a set of well-defined detector and sample parameters, without any reference to empirical data. For a p-type detector model the application of different codes resulted in satisfactory agreement in the calculated correction factors. For high-efficiency geometries in combination with an n-type detector and a radionuclide emitting abundant X-rays the results were scattered.