Quench Correction by External Standard Source ¹⁵²Eu Exchanged for Originally Equipped ²²⁶Ra

Abstract

The external standard source of liquid scintillation counter, ²²⁶Ra, was exchanged to ¹⁵²Eu. Quench correction curves by irradiating the radiation to quenched standard samples for a single labeled ³H or ¹⁴C, or dual labeled ³H and ¹⁴C, were plotted by the computer software that controls the liquid scintillation counting system. Using the correction curve, the radioactivity of quenched standard sample for making correction curves, was determined again quantitatively. The most of corrected values were within ±5% error of the nominal radioactivity of the standard sample.