Analysis of detection-efficiency variation techniques for the implementation of the TDCR method in liquid scintillation counting

Detection efficiency variation is often used in liquid scintillation counting in order to evaluate a parameter in the detection efficiency calculation model. The aim of this paper is to compare the effects of three different detection efficiency variation methods in the activity measurement of three pure-beta radionuclides: 3H, 63Ni and 14C. Some general conclusions concerning the TDCR method are drawn.