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一、引言探测氡及其子体的α粒子的连续测氡仪,能否长期稳定工作的一个关键问题是自动脱氡装置的性能。目前所用的脱氡装置,大体可分为三类:(1)喷嘴型,主要由进水容器、喷嘴和排水容器组成;(2)喷雾型,主要由储水槽、喷雾室、排水容器和抽气泵组成;(3)分离室型,硫化锌闪烁体直接涂于分离室顶部内表面,气体不流动或内循环。二、连续脱氡装置的脱氡原理及主要影响因素各类脱氡装置的结构不同,但其脱氡原理相同。这里仅就喷嘴型脱氡装置加以讨论。如果一密闭容器中存在水相和气相(包括氡气),那么氡就由水相进入气相或由气相进入水相。在一定温度下,当水、气两相氡浓度不变时(不考虑衰变的影响),即单位时间内从水相进入气相的氡量与从气相进入水相的氡量相等时,则达到了溶解平衡。实验表明,此
I. INTRODUCTION Continuous detection of radon and alpha-particle radon progenitors of radon and its progeny is one of the key issues in long-term and stable operation of the auto-radon removal device. Currently used de-radon devices can be divided into three categories: (1) nozzle type, mainly by the water container, nozzle and drainage container composition; (2) spray type, mainly by the storage tank, spray chamber, drainage containers and pumping Air pump composition; (3) separation chamber, zinc sulfide scintillator directly applied to the inner surface of the separation chamber, the gas does not flow or internal circulation. Second, the principle of continuous radon de-radon device and the main factors of de-radon device of various types of different structures, but the same principle of radon off. Only nozzle-type radon removal devices are discussed here. If a water and vapor phase (including radon) is present in a closed container, radon enters the gas phase from the water phase or enters the water phase from the gas phase. At a certain temperature, when the radon concentration of water and gas phases is the same (without considering the effect of decay), that is, the amount of radon entering the gas phase from the water phase per unit time is equal to the amount of radon entering the water phase from the gas phase The balance of dissolution. Experiments show that this