原子能科学技术
原子能科學技術
원자능과학기술
ATOMIC ENERGY SCIENCE AND TECHNOLOGY
2013年
9期
1483-1487
,共5页
郑艳明%汪建清%姚顺和%杨巧玲%姚艳玲
鄭豔明%汪建清%姚順和%楊巧玲%姚豔玲
정염명%왕건청%요순화%양교령%요염령
88 Y%4π(PPC )X-γ%数字符合%效率外推
88 Y%4π(PPC )X-γ%數字符閤%效率外推
88 Y%4π(PPC )X-γ%수자부합%효솔외추
88 Y%4π(PPC)X-γ%digital coincidence counting%efficiency extrapolation
本文介绍了采用4π(PPC )X-γ数字符合测量装置绝对测量88 Y放射性活度的方法。为提高对X射线的探测效率,实验采用高气压正比计数器,测量比较了甲烷和氩甲烷作为其工作气体的坪曲线,后者具有探测效率高、起始坪电压低的优势,因此采用氩甲烷为工作气体。采集原始谱数据后,选择不同的感兴趣γ窗进行离线数字符合计算,并分析了效率外推的结果和测量的不确定度。
本文介紹瞭採用4π(PPC )X-γ數字符閤測量裝置絕對測量88 Y放射性活度的方法。為提高對X射線的探測效率,實驗採用高氣壓正比計數器,測量比較瞭甲烷和氬甲烷作為其工作氣體的坪麯線,後者具有探測效率高、起始坪電壓低的優勢,因此採用氬甲烷為工作氣體。採集原始譜數據後,選擇不同的感興趣γ窗進行離線數字符閤計算,併分析瞭效率外推的結果和測量的不確定度。
본문개소료채용4π(PPC )X-γ수자부합측량장치절대측량88 Y방사성활도적방법。위제고대X사선적탐측효솔,실험채용고기압정비계수기,측량비교료갑완화아갑완작위기공작기체적평곡선,후자구유탐측효솔고、기시평전압저적우세,인차채용아갑완위공작기체。채집원시보수거후,선택불동적감흥취γ창진행리선수자부합계산,병분석료효솔외추적결과화측량적불학정도。
The activity measurement of 88 Y by 4π(PPC)X-γ digital coincidence counting method was introduced in this paper .In order to improve detection efficiency of X ray , high pressure proportional counter was used .It is found that the argon methane gas has the advantage of high detection efficiency and low operating voltage by comparing the plateau curves of methane gas and argon methane gas .T he argon methane gas is chosen as the working gas .After the collection of original spectrum ,different γ windows were selected for the offline digital coincidence counting calculation , and the efficiency extrapolation values and the measurement uncertainty were analyzed .