Li H, Zhang L, Guo Q
State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China.
Radiat Prot Dosimetry. 2012 Nov;152(1-3):84-8. doi: 10.1093/rpd/ncs194. Epub 2012 Aug 31.
Passive measuring devices are comprehensively employed in thoron progeny surveys, while the deposition velocity of thoron progeny is the most critical parameter, which varies in different environments. In this study, to analyse the influence of environmental factors on thoron progeny deposition velocity, an improved model was proposed on the basis of Lai's aerosol deposition model and the Jacobi's model, and a series of measurements were carried out to verify the model. According to the calculations, deposition velocity decreases with increasing aerosol diameter and also aerosol concentration, while increases with increasing ventilation rate. In typical indoor environments, a typical value of 1.26 × 10(-5)m s(-1) is recommended, with a range between 7.6 × 10(-7) and 3.2 × 10(-4) m s(-1).
在钍射气子体调查中广泛使用被动测量装置，而钍射气子体的沉积速度是最关键的参数，它在不同环境中有所不同。在本研究中，为了分析环境因素对钍射气子体沉积速度的影响，在赖氏气溶胶沉积模型和雅可比模型的基础上提出了一个改进模型，并进行了一系列测量以验证该模型。根据计算结果，沉积速度随气溶胶直径和气溶胶浓度的增加而降低，随通风率的增加而增加。在典型的室内环境中，建议典型值为1.26×10⁻⁵米/秒，范围在7.6×10⁻⁷至3.2×10⁻⁴米/秒之间。
