Realisation of Radionuclides Activity Unit Using the Liquid Scintillation Counting (Lsc)

Abstract

Registration of the effects of interaction of the radiation emitted after radioactive decay enables determination of activity of a given material expressed in becquerels (Bq). Measurements in a frame of international comparisons of 14 C activity using the triple-to-double coincidence ratio (TDCR) method and of 177 Lu activity using the 4(LS)- coincidence and anticoincidence method, where the liquid scintillation technique (LSC) was used, were described. Specificity of short-lived radionuclides activity determination was discussed.