¹³³Ba has been standardised by direct measurements for the first time in the laboratory using two counting systems: (i) the 4πβ (plastic scintillator) -γ coincidence, (ii) the 4πβ (proportional counter) -γ coincidence. Furthermore, this standardisation experiment demonstrates the performance and applicability of the recently developed 4πβ (plastic scintillator)-γ coincidence system for radionuclides decaying with complex decay schemes as well as for e, X-γ emitters. Additionally, ¹³³Ba solution standards were prepared to calibrate the pressurized 4π γ ionisation chamber and determination of the calibration coefficient. The E_n score is a statistical indicator of the agreement between two independent estimations. Thus, the performance of the PS system was compared to the result obtained with the PC system using the E_n score as specified in the ISO13528:2015. The results of measurements are acceptable if E_n ≦ 1.0. An E_n score of 0.2 was obtained which indicates that, the ¹³³Ba activity concentration obtained by the 4πβ (plastic scintillator) -γ coincidence and 4πβ (proportional counter) -γ coincidence systems are in agreement. This paper presents the standardisation procedure, the results obtained by the measurements and their comparison.

¹³³ Ba在实验室中首次通过直接测量使用两个计数系统进行了标准化：（i）4πβ（塑料闪烁体）-γ符合，（ii）4πβ（比例计数器）-γ符合。此外，该标准化实验证明了最近开发的4πβ（塑料闪烁体）-γ重合系统的性能和适用性，该系统适用于通过复杂衰变方案衰变的放射性核素以及e，X-γ发射体。另外，准备了¹³³ Ba溶液标准液以校准加压的4πγ电离室并确定校准系数。该Ë _ñ分数是两个独立估计之间一致性的统计指标。因此，将PS系统的性能与PC系统使用ISO 13528：2015中指定的E _n得分获得的结果进行比较。测量的结果是，如果可接受Ë _Ñ  ≦1.0。得到的E _n值为0.2，表明通过4πβ（塑料闪烁体）-γ符合系统和4πβ（比例计数器）-γ符合系统获得的¹³³ Ba活性浓度一致。本文介绍了标准化程序，通过测量获得的结果及其比较。