Mostafa A M A, Tamaki K, Moriizumi J, Yamazawa H, Iida T
Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan.
Radiat Prot Dosimetry. 2011 Jul;146(1-3):19-22. doi: 10.1093/rpd/ncr097. Epub 2011 Apr 26.
This study was performed to measure the activity size distribution of aerosol particles associated with short-lived radon decay products in indoor air at Nagoya University, Nagoya, Japan. The measurements were performed using a low pressure Andersen cascade impactor under variable meteorological conditions. The results showed that the greatest activity fraction was associated with aerosol particles in the accumulation size range (100-1000 nm) with a small fraction of nucleation mode (10-100 nm). Regarding the influence of the weather conditions, the decrease in the number of accumulation particles was observed clearly after rainfall without significant change in nucleation particles, which may be due to a washout process for the large particles.
本研究旨在测量日本名古屋市名古屋大学室内空气中与短寿命氡衰变产物相关的气溶胶粒子的活度粒径分布。测量是在可变气象条件下使用低压安德森级联撞击器进行的。结果表明，最大的活度分数与积聚粒径范围（100 - 1000纳米）的气溶胶粒子相关，成核模式（10 - 100纳米）的粒子占比小。关于天气条件的影响，降雨后积聚粒子数量明显减少，而成核粒子没有显著变化，这可能是大粒子的冲刷过程所致。
