Optimization of the thoron progeny compensation system of a thoron calibration chamber
Optimization of the thoron progeny compensation system of a thoron calibration chamber
复制标题
钍气校准室钍气子体补偿系统的优化
DOI：
10.1007/s10967-020-07180-y
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发表时间：
2020
影响因子：
1.6
通讯作者：
Liu Wei
中科院分区：
文献类型：
--
作者：
Li Weiwei;Zhou Qingzhi;He Zhengzhong;Li Guiyuan;Liu Wei
Thoron子体的长期稳定性和均匀性是Thoron定标室性能的关键，而Thoron定标室的性能对测量Thoron子体的质量保证至关重要。由于~(212)Pb的半衰期较长，很难建立稳定、高水平的~(212)P子体。因此，需要一个稳定而有效的补偿系统来补偿采样、衰变和壁面沉积造成的Thoron子体的损失。本文对南方中国大学的Thoron子代补偿系统进行了优化，提出了一种合适的通风量调节方法，有效地提高了Thoron子代的活跃度和产出率的稳定性。实验结果表明，~(212)Pb活度产出率提高了28%，产出率更加稳定。在此条件下，THB活性产率达到稳定的时间缩短了33%，THC活性达到稳定的时间缩短了40%。此外，THC和THB的浓度比在0到0.82之间。
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 of212Pb 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 the212Pb 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.