Abstract The activity size distributions of cosmogenic 7Be and the longer living radon progenies 210Pb and 210Po in urban aerosols were measured for summers and winters from, 2014 to the end of 2017. The average seasonal activity median aerosol diameters (AMADs) and mass median aerosol diameters (MMADs) calculated for summer ranged from 0.329 μm to 0.733 μm and were ordered AMADBe-7,

中文翻译：

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城市气溶胶中7Be、210Pb和210Poradionuclides活性大小分布的季节性波动

摘要 测量了 2014 年至 2017 年底的夏季和冬季城市气溶胶中宇宙源 7Be 和寿命更长的氡子体 210Pb 和 210Po 的活动大小分布。平均季节性活动中值气溶胶直径（AMADs）和质量中值气溶胶直径夏季计算的 (MMAD) 范围从 0.329 μm 到 0.733 μm，订购了 AMADBe-7，