Development of measuring exchange of ultrafine particles using radioactive nuclide as a tracer

气溶胶颗粒的存在对植物和人类的影响仍有待充分阐明。地面上气载物质的去除机制主要包括湿沉积过程和干沉积过程。尽管干沉降的机理比湿沉降要复杂得多，但有关超细气溶胶颗粒干沉降的信息却很少。在这项研究中，我们研制了一种测量超细粒子干沉积通量的装置，该装置使用未附着的氡子体作为示踪剂。

It remains to be fully elucidated how the presence of aerosol particles influences plant and human. Removal mechanisms of airborne substances over the ground consist mainly of wet and dry deposition processes. Although the mechanism of dry deposition is more complicate than wet deposition, little information on dry deposition of ultrafine aerosol particles is available. In this study we developed the implement of measuring the dry deposition flux of ultrafine particles using unattached radon progeny as a tracer.