【摘要】 为了满足氡室内氡子体辐射场的调控要求,结合蒸发冷凝法的原理,利用电子烟发生器产生的癸二酸二辛酯（DEHS）与雾化器产生的NaCl颗粒结合再冷凝的方法,研制了高浓度单分散的气溶胶发生器。将该发生器应用于中国计量科学研究院20 m³氡室,充胶1分钟后气溶胶浓度最高可达到2.26×10⁵ cm^-3,平均粒径156.8 nm,单分散性1.38,氡室内氡子体平衡因子可调控达到0.65。更多还原

【Abstract】 To meet the requirements of regulating equilibrium factor of radon and its progency,a generator of high concentration and mono-disperse aerosol based on the evaporation-condensation method utilizing diethylhexylsebacate（ DEHS） droplets produced by an electronic cigarette generator and Na Cl particles produced by an atomizer was developed to produce high concentration and mono-disperse aerosol. This developed aerosol generator was used in an 20 m³ radon chamber of the National Institute of Metrology. After one minute injection,the highest concentration of aerosol approached 2. 26 × 10⁵ cm^-3 with an average particle size of 156. 8 nm and a mono-disperse degree of 1. 38. The equilibrium factor of radon and its progeny can approach to 0. 65 with regulating of the developed generator.更多还原