4πβ+4πγ计数法测量~(166)Ho~m活度

Determination of Activity of ~(166)Ho~m by 4πβ+4πγ Counting Method

摘要: 描述了4πβ+4πγ活度测量方法的基本原理,以及4πβ+4πγ活度测量装置的构成和性能指标。将原有的166Hom国际比对溶液制成VYNS薄膜源进行比活度测量,计算得到166Hom的总探测效率均大于99.99%,比活度的算术平均值为130.17(1±0.21%)Bq/mg。国际比对推荐结果为130.10(1±0.4%)Bq/mg,二者符合很好。

Abstract: The paper describes the basic principle and equipment of 4πβ+4πγ method for activity measurement. Using this method, 166Hom VYNS film sources were measured. In the experiment, total efficiencies of 166Hom VYNS film sources all exceed 99.99% and the mean specific activity is 130.17(1±0.21%) Bq/mg, which agrees well with the international comparison result,130.10(1±0.4%) Bq/mg.