| Abstract: |
A two-dimensional analysis of three coincident gammas in Ag108m decay, detected by two Nal(T1) scintillation detectors, allows a direct measurement of the source activity. A modification of Eldridge-Crowther formulas derived originally for 125I was done recently for the case of two coincident γ-rays in 60Co decay (Volkovitsky and Naudus, 2009). A similar approach is applied to a more complicated case of three coincident gammas in the 108mAg decay. The large number of experimental quantities, measured both in coincidence and anticoincidence modes, allows to determine both detector efficiencies for all three γ-rays protopeaks and to find a source activity. Results are compared with hoses obtained with HPGe detectors |
Click here to retrieve PDF version of paper (2MB)