一个用于4πβ+4πγ活度测量的小型流气式正比计数器  

A new small column proportional counter for the 4πβ+4πγ counting method

作　　者：李琦[1] 常永福[1] 解峰[1] 连琦[1] 凡金龙[1] 许启初[1] 卢嘉春[1] 王莉[1] 

机构地区：[1]西北核技术研究所

出　　处：《核电子学与探测技术》2005年第2期131-133,共3页Nuclear Electronics & Detection Technology

摘　　要：详细描述了新研制的一个用于4πβ+4πγ活度测量的小型圆柱型4πβ流气式正比计数器的结构,给出了内部电场分布,并测量了对60Co、134Cs、169Yb和241Am四种代表性核素的坪曲线,坪斜都小于1%/100V,对60Co发出的最大能量318.1keVβ射线探测效率为95%。该计数器可应用于短寿命核素和常规的β-γ、α-γ衰变核素测量。The configuration and internal electrical field distribution of a new column 4πβ proportional counter which is used in 4πβ+4πγcounting system are described in detail. The plateau curves of ()^(60)Co,(()^(134)Cs,)()^(169)Yb and ()^(241)Am are measured , and all the slopes of plateau are less than 1%/100V. The detect efficiency of the counter to the E_(max) 318keV β^- ray of ()^(60)Co is 95%. Use of this counter makes it possible to measure short half-life nuclides and also easy to measure usual β-γ,α-γ decay nuclides.

关 键 词：^60CO 核素 Β射线 寿命 常规 描述 能量 活度 衰变 场分布 

分 类 号：TL942.1[核科学技术—辐射防护及环境保护] O571[理学—粒子物理与原子核物理]