Activity determination of 68Ge/68Ga by means of 4πβ(Č)-γ coincidence counting

The arithmetic mean of two results (from double ND and triple NT coincidences in the β channel) was adopted as the final result for the activity concentration of the solution under study. The overall relative uncertainty was estimated to be 0.82% and the uncertainty consideration as well as details about the measurement and the analysis are discussed. The measurements were carried out within the scope of the international CCRI(II)-K2.Ge-68 comparison.