Optimization of the thoron progeny compensation system of a thoron calibration chamber

被引：3

作者：

Li, Weiwei ^{[1
]}

Zhou, Qingzhi ^{[1
]}

He, Zhengzhong ^{[1
]}

Li, Guiyuan ^{[1
]}

Liu, Wei ^{[1
]}

机构：

[1] Univ South China, Sch Nucl Sci & Technol, 28 Changshengxi Rd, Hengyang 421001, Hunan, Peoples R China

来源：

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2020年 / 324卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Thoron progeny; Control method; Thoron progeny output rate; SIZE;

D O I：

10.1007/s10967-020-07180-y

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The long-term stability and homogeneity of thoron progeny are key to the performance of a thoron calibration chamber, which is vital to quality assurance in measuring thoron progeny. It is difficult to build a stable and high level of thoron progeny because the half-life of Pb-212 is long. Thus, a stable and efficient compensation system is necessary to compensate for the loss of thoron progeny caused by sampling, decay, and wall deposition. In this paper, a thoron progeny compensation system at the University of South China is optimized, and a suitable ventilation rate regulation method is developed that can effectively improve the activity level and stability of output rate for thoron progeny. The experimental results show that the Pb-212 activity output rate increases by 28% and that the output rate is more stable. Under these conditions, the time for the output rate of ThB activity to reach stability is reduced by 33%, and for ThC, the time to reach stability is reduced by 40%. Furthermore, the concentration ratios of ThC and ThB range from 0 to 0.82.

引用

页码：1255 / 1263

页数：9