Consistency test of coincidence-summing calculation methods for extended sources.

An internal consistency test of the calculation of coincidence-summing correction factors F C for volume sources is presented. The test is based on exact equations relating the values of F C calculated for three ideal measurement configurations. The test is applied to a number of 33 sets of F C values sent by 21 teams. Most sets passed the test, but not the results obtained using the quasi-point source approximation; in the latter case the test qualitatively indicated the magnitude of the bias of F C. • A self-consistency test of coincidence summing calculations is presented. • It is based on equations relating F C values for 3 ideal volume geometries. • Can be easily applied in any laboratory for checking the quality of F C software. • 33 sets of F C values (various computations) for 60Co, 133Ba, 134Cs, 152Eu evaluated. • Inconsistency and bias of F C based on quasi-point source approximation revealed. [ABSTRACT FROM AUTHOR]