Abstract
A multi-channel time-scaling (MCTS) technique has been applied for an absolute standardization of a 57 Co solution using a 4π (e −, X) − γ coincidence counting method. Four radioactive samples were prepared and the nominal activities observed in the proportional counter were from 700 to 1400 s −1. The true coincidence rates together with the corresponding electron capture detection efficiencies can be obtained experimentally. The results are compared with those calculated from mathematical formulae.
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