Determination of 226Ra Activity Using Gamma Spectrometry with 226Ra-222Rn Disequilibrium

被引：3
|
作者：
Li, Qi [1 ,2 ]
Wang, Shilian [2 ]
Zhao, Yungang [2 ]
Liu, Shujiang [2 ]
Fan, Yuanqing [2 ]
Shi, Jianfang [2 ]
Jia, Huaimao [2 ]
Yu, Weixiang [1 ]
机构：
[1] China Inst Atom Energy, Sci & Technol Nucl Data Lab, Beijing 102413, Peoples R China
[2] CTBT Beijing Natl Data Ctr & Radionuclide Lab, Beijing 100085, Peoples R China
来源：
HEALTH PHYSICS | 2015年 / 109卷 / 02期
关键词：
SAMPLES;
D O I：
10.1097/HP.0000000000000302
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Radium-226 (Ra-226) activity is normally determined indirectly by gamma spectrometry, in particular by measuring the characteristic gamma-ray emitted from its progeny (Pb-214 and Bi-214) when Ra-226-Rn-222 secular equilibrium is reached. This article describes a measurement method involving the measurement of Pb-214 ingrowth. The activity of Ra-226 determined by this method agrees with that measured after Ra-226-Rn-222 equilibrium. The method of Pb-214 ingrowth allows rapid and sufficiently accurate determination of Ra-226 activity without the need to wait for Ra-226-Rn-222 equilibrium.
引用
收藏
页码：113 / 116
页数：4
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