原子能科学技术
原子能科學技術
원자능과학기술
ATOMIC ENERGY SCIENCE AND TECHNOLOGY
2014年
11期
2133-2136
,共4页
液闪%活度%不确定度
液閃%活度%不確定度
액섬%활도%불학정도
liquid scintillation%activity%uncertainty
介绍了新建液闪活度绝对测量装置,该装置应用液闪三管两管符合比(TDCR)测量原理对β放射性核素活度进行测量。装置由3个光电倍增管及自制的散焦分压线路组成。通过改变光电倍增管的聚焦来改变探测效率,测量了3 H放射源活度并进行了不确定度分析及讨论,TDCR测量结果与标定值在0.9%内符合,合成标准不确定度为0.6%(k=1)。
介紹瞭新建液閃活度絕對測量裝置,該裝置應用液閃三管兩管符閤比(TDCR)測量原理對β放射性覈素活度進行測量。裝置由3箇光電倍增管及自製的散焦分壓線路組成。通過改變光電倍增管的聚焦來改變探測效率,測量瞭3 H放射源活度併進行瞭不確定度分析及討論,TDCR測量結果與標定值在0.9%內符閤,閤成標準不確定度為0.6%(k=1)。
개소료신건액섬활도절대측량장치,해장치응용액섬삼관량관부합비(TDCR)측량원리대β방사성핵소활도진행측량。장치유3개광전배증관급자제적산초분압선로조성。통과개변광전배증관적취초래개변탐측효솔,측량료3 H방사원활도병진행료불학정도분석급토론,TDCR측량결과여표정치재0.9%내부합,합성표준불학정도위0.6%(k=1)。
The liquid scintillation counting system recently constructed for absolute activity measurement was introduced ,and it uses TDCR method to measure activity ofβnuclide .The system is equipped with three PM Ts connected to a de‐focusing voltage divider base developed by ourselves .After varying the efficiency by de‐focusing of the PM tube ,the activity of the 3 H source was determined .The analysis of uncertainty and discussion of measurement result were given .The activity determined with TDCR is in agreement with certified value within the range of 0.9% .The combined uncertainty of results is 0.6% (k=1) .