Detection sensitivity of time interval analysis for the determination of α-radionuclides with millisecond order lifetimes
Detection sensitivity of time interval analysis for the determination of α-radionuclides with millisecond order lifetimes
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毫秒级寿命α-放射性核素时间间隔分析的检测灵敏度
DOI：
10.1007/bf02102701
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发表时间：
1993
影响因子：
1.6
通讯作者：
H. Washio
中科院分区：
文献类型：
--
作者：
T. Hashimoto;Y. Uezu;F. Ishizuka;H. Washio
从探测灵敏度的角度出发，用时间间隔分析（TIA）方法，从其它随机背景事例中选择性地提取了216Po（145ms）、217At（32.3ms）和215Po（1.78ms）三种短寿命α衰变事例的相关事例。在基于概率和统计的理论处理中，阐明了检测灵敏度按以下顺序随着半衰期的缩短而成比例地增加：215 Po> 217 At> 216 Po。在实验中，使用多重TIA技术分析了液体闪烁体由于α衰变事件产生的脉冲，并得出了锕系中最高灵敏度的219 Rn − 215 Po对。因此，多重TIA方法被应用于天然样品中219Rn −215Po对的实际测定。
A selective extraction of the correlated events due to three kinds of short-lived α-decay events,216Po (145 ms),217At (32.3 ms) and215Po (1.78 ms), from other random background events were examined by using a time interval analysis (TIA) from the viewpoint of detection sensitivity. In the theoretical treatment based on the probability and statistics, it was clarified that the detection sensitivity proportionally increased with shortening half-lives in the following order,215Po>217At>216Po. In the experiments, pulses from a liquid scintillator owing to α-decay events were analyzed using a multiple TIA technique and resulted in the highest sensitivity of219Rn−215Po pairs in the actinium series. Thus, the multiple TIA method was applied to the practical determination of219Rn−215Po pairs in natural samples.